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Looking for thermostat to operate at near 32F - 0C
Looking for a thermostat to control a small heater in a cold room
I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. Colder is. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? |
Looking for thermostat to operate at near 32F - 0C
Attila Iskander wrote: Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. Colder is. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? Hi, Send an email to Honeywell tech support. |
Looking for thermostat to operate at near 32F - 0C
On Sun, 2 Dec 2012 13:58:58 -0600, " Attila Iskander"
wrote: Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. Colder is. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? Never saw one. Most have a minimum of 40. I maintain a large building that is mostly unoccupied but has water for sprinklers and bathrooms and use 40 to 45 as the minimum. That gives me a little margin if the heating systems fail. Remember, their is also some stratification and cold spots along the wall and windows. There can be some variance side to side depending on solar load, air circulation, etc. If freezing is a danger, you want more than 34 degrees at the thermostat. Depending on how often the room is checked and what happens below freezing, you may want to kick up the temperature to give even more time, say 12 to 24 hours of no heat before there is damage. |
Looking for thermostat to operate at near 32F - 0C
On Dec 2, 4:35*pm, Tony Hwang wrote:
* Attila Iskander wrote: Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. * * Colder is. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? Hi, Send an email to Honeywell tech support. - Hide quoted text - - Show quoted text -- Hide quoted text - - Show quoted text - Well, let's see. You want it to maintain a temp just above freezing. That's not a temp range for a house, but it is for a refrigerator. I'd look on Ebay for "refrigerator thermostat". I'm sure you'll find a variety of form factors. Aside from that, if the goal is to keep things from freezing, I'd go with at least 37F. There can be considerable variation in temps in a room. |
Looking for thermostat to operate at near 32F - 0C
On 12/2/12 1:58 PM, Attila Iskander wrote:
Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. Colder is. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? Look for garage or low temperature thermostats. |
Looking for thermostat to operate at near 32F - 0C
"Tony Hwang" wrote in message ... Attila Iskander wrote: Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. Colder is. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? Hi, Send an email to Honeywell tech support. Thanks I'll do that. |
Looking for thermostat to operate at near 32F - 0C
"Ed Pawlowski" wrote in message ... On Sun, 2 Dec 2012 13:58:58 -0600, " Attila Iskander" wrote: Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. Colder is. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? Never saw one. Most have a minimum of 40. I maintain a large building that is mostly unoccupied but has water for sprinklers and bathrooms and use 40 to 45 as the minimum. That gives me a little margin if the heating systems fail. Remember, their is also some stratification and cold spots along the wall and windows. There can be some variance side to side depending on solar load, air circulation, etc. If freezing is a danger, you want more than 34 degrees at the thermostat. Depending on how often the room is checked and what happens below freezing, you may want to kick up the temperature to give even more time, say 12 to 24 hours of no heat before there is damage. This is a semi-underground uninsulated concrete "bunker" under a 3 season porch. It's primary intent is tornado shelter, but it serves as a cold storage room for freezer, spare fridge, and other food items. Temperature never goes above 40F in summer, even with freezer and fridge in it. Because in winter, temperatures can fall way below freezing outside, the temperature inside follows along. The intent is to block it from going below freezing. so that stuff like spare milk and canned/preserved foods don't freeze. |
Looking for thermostat to operate at near 32F - 0C
wrote in message ... Attila Iskander wrote: Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. Colder is. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? # # Well, let's see. You want it to maintain a temp just above # freezing. That's not a temp range for a house, but it is # for a refrigerator. I'd look on Ebay for "refrigerator thermostat". # I'm sure you'll find a variety of form factors. Nope It's an uninsulated, unheated concrete "bunker" under a 3-season porch, that is intended as a tornado shelter, but serves mostly as a storage room. In winter, because it's partically exposed above ground level, the temperature drops to nearly the same temperature as outside. And yes, the idea is to keep it just above freezing, with minimal outlay of energy And no, it's not going to be insulated real soon. # Aside from that, if the goal is to keep things from freezing, # I'd go with at least 37F. There can be considerable variation # in temps in a room. And ? Do you have a suggestion ? |
Looking for thermostat to operate at near 32F - 0C
" Attila Iskander" wrote:
Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. Colder is. Then you need to make it come on *before* 32F. how much before depends on the difference between the heat loss of the room and the BTU/h of the heater. You might get away with a light bulb or two left on. That's what we used in an uninsulated well house and it survived 10 below zero with a 100 watt bulb. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? You might have to cob it to 'plug it in' - but there are line voltage thermostats that do 40F for $25-30. Hmm-- Here's a greenhouse therm- 30F-110F - $50- plug in. http://www.littlegreenhouse.com/acce...controls.shtml Jim |
Looking for thermostat to operate at near 32F - 0C
"Jim Elbrecht" wrote in message ... " Attila Iskander" wrote: Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. Colder is. Then you need to make it come on *before* 32F. how much before depends on the difference between the heat loss of the room and the BTU/h of the heater. You might get away with a light bulb or two left on. That's what we used in an uninsulated well house and it survived 10 below zero with a 100 watt bulb. Tried that, but I would like to reduce wasted electricity as much as possible, so I want to produce as much heat as possible for the current used. Electricity is getting pretty expensive where I am. And it's bound to get higher as more coal power plants shut down Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? You might have to cob it to 'plug it in' - but there are line voltage thermostats that do 40F for $25-30. Hmm-- Here's a greenhouse therm- 30F-110F - $50- plug in. http://www.littlegreenhouse.com/acce...controls.shtml Wow Thermostatic outlet for either heating or cooling That seems to fit the bill even though the upper range is higher than I would like I'll keep this as a fall back, if I can't find something that doesn't go that high Thanks |
Looking for thermostat to operate at near 32F - 0C
Dean Hoffman wrote:
On 12/2/12 1:58 PM, Attila Iskander wrote: Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. Colder is. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? Look for garage or low temperature thermostats. Actually found one. I was looking through my memory. Digital controllers start at $50 and go up in price. Many have relay outputs or fairly heavy loads. in searching Internet found a kit. Don't know what op can do. The other thermostat will require ac transformer and suitable relay. Complete systems usually would cost. Here are the two I found. No specs I found. http://www.bakatronics.com/shop/item.aspx?itemid=736 http://www.amazon.com/Honeywell-CT50.../dp/B002Z7EBCE Greg |
Looking for thermostat to operate at near 32F - 0C
On 12/2/12 7:33 PM, gregz wrote:
Dean Hoffman wrote: On 12/2/12 1:58 PM, Attila Iskander wrote: Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. Colder is. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? Look for garage or low temperature thermostats. Actually found one. I was looking through my memory. Digital controllers start at $50 and go up in price. Many have relay outputs or fairly heavy loads. in searching Internet found a kit. Don't know what op can do. The other thermostat will require ac transformer and suitable relay. Complete systems usually would cost. Here are the two I found. No specs I found. http://www.bakatronics.com/shop/item.aspx?itemid=736 http://www.amazon.com/Honeywell-CT50.../dp/B002Z7EBCE Greg It just dawned on me that livestock buildings might use something like the OP wants. One he http://tinyurl.com/cavslpu This one http://tinyurl.com/bl8cjpt almost installs itself. |
Looking for thermostat to operate at near 32F - 0C
On 12/2/12 7:33 PM, gregz wrote:
Dean Hoffman wrote: On 12/2/12 1:58 PM, Attila Iskander wrote: Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. Colder is. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? Look for garage or low temperature thermostats. Actually found one. I was looking through my memory. Digital controllers start at $50 and go up in price. Many have relay outputs or fairly heavy loads. in searching Internet found a kit. Don't know what op can do. The other thermostat will require ac transformer and suitable relay. Complete systems usually would cost. Here are the two I found. No specs I found. http://www.bakatronics.com/shop/item.aspx?itemid=736 http://www.amazon.com/Honeywell-CT50.../dp/B002Z7EBCE Greg It just dawned on me that livestock buildings might use something like the OP wants. One he http://tinyurl.com/cavslpu This one http://tinyurl.com/bl8cjpt almost installs itself. |
Looking for thermostat to operate at near 32F - 0C
gregz wrote:
Dean Hoffman wrote: On 12/2/12 1:58 PM, Attila Iskander wrote: Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. Colder is. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? Look for garage or low temperature thermostats. Actually found one. I was looking through my memory. Digital controllers start at $50 and go up in price. Many have relay outputs or fairly heavy loads. in searching Internet found a kit. Don't know what op can do. The other thermostat will require ac transformer and suitable relay. Complete systems usually would cost. Here are the two I found. No specs I found. http://www.bakatronics.com/shop/item.aspx?itemid=736 http://www.amazon.com/Honeywell-CT50.../dp/B002Z7EBCE Greg Feel like I'm back at work. Ok, found a no brainer. http://www.menards.com/main/heating-...t/p-134238.htm Greg |
Looking for thermostat to operate at near 32F - 0C
On 12/2/12 7:33 PM, gregz wrote:
Dean Hoffman wrote: On 12/2/12 1:58 PM, Attila Iskander wrote: Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. Colder is. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? Look for garage or low temperature thermostats. Actually found one. I was looking through my memory. Digital controllers start at $50 and go up in price. Many have relay outputs or fairly heavy loads. in searching Internet found a kit. Don't know what op can do. The other thermostat will require ac transformer and suitable relay. Complete systems usually would cost. Here are the two I found. No specs I found. http://www.bakatronics.com/shop/item.aspx?itemid=736 http://www.amazon.com/Honeywell-CT50.../dp/B002Z7EBCE Greg It just dawned on me that livestock buildings might use something like the OP wants. One he http://tinyurl.com/cavslpu This one http://tinyurl.com/bl8cjpt almost installs itself. |
Looking for thermostat to operate at near 32F - 0C
"Dean Hoffman" wrote in message ... It just dawned on me that livestock buildings might use something like the OP wants. One he http://tinyurl.com/cavslpu This one http://tinyurl.com/bl8cjpt almost installs itself. That seems to pretty well cover my specs. It will unlike some of the other suggestions do it at pretty low cost and ease of install.. Goes one my eval list Thank you |
Looking for thermostat to operate at near 32F - 0C
On 12-03-2012 21:31, grumpy wrote:
Nope refrigerator Tst. works in opposite direction it must be one that controls heat Like most thermostats, it is either on or off. Swapping the two is trivial. -- Wes Groleau It seems a pity that psychology should have destroyed all our knowledge of human nature. €” G. K. Chesterton |
Quote:
A fridge or freezer thermostat wouldn't work because a fridge or freezer thermostat makes an electrical contact on a RISE in temperature. So, it would work backward to what you want. It would turn the heater on as the room warmed up rather than turning it on as the room cooled down. Contrary to popular belief, you can freeze milk. I still remember watching newsreels in school that showed people buying frozen milk by the pound in Churchill, Manitoba. They would take it home, put it in a pail, let it melt and drink it. |
Looking for thermostat to operate at near 32F - 0C
On 12/2/2012 11:49 PM, Wes Groleau wrote:
On 12-03-2012 21:31, grumpy wrote: Nope refrigerator Tst. works in opposite direction it must be one that controls heat Like most thermostats, it is either on or off. Swapping the two is trivial. Sorry Wes, you're wrong. Thermostats have what's called a "set-point" and commercial thermostats on food service and industrial process control systems have adjustable "cut-in" and "cut-out" set-points for operation of heating or cooling. Even your digital wall thermostat for heating and cooling your home may have an adjustable span which is the temperature band where it will remain quiescent. The older traditional mechanical wall thermostats have an adjustable heat anticipator for that purpose. All control systems have hysteresis built in for them to operate properly. ^_^ TDD |
Looking for thermostat to operate at near 32F - 0C
"nestork" wrote in message ... Attila Iskander Wrote: The intent is to block it from going below freezing. so that stuff like spare milk and canned/preserved foods don't freeze. Two things: A fridge or freezer thermostat wouldn't work because a fridge or freezer thermostat makes an electrical contact on a RISE in temperature. So, it would work backward to what you want. It would turn the heater on as the room warmed up rather than turning it on as the room cooled down. Had not intention of salvaging a thermostat from a fridge or freezer Nor do I intend to do anything that requires fiddling I'm looking for and off the shelf, plug and play solution. (And a couple have already been shown) Contrary to popular belief, you can freeze milk. I still remember watching newsreels in school that showed people buying frozen milk by the pound in Churchill, Manitoba. They would take it home, put it in a pail, let it melt and drink it. Been there done that. I like having liquid milk when one of the kids goes down to get the next bottle So that's why I intend to keep the room above freezing |
Looking for thermostat to operate at near 32F - 0C
On Dec 2, 6:09*pm, " Attila Iskander"
wrote: wrote in message ... Attila Iskander wrote: Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. Colder is. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? # # Well, let's see. *You want it to maintain a temp just above # freezing. *That's not a temp range for a house, but it is # for a refrigerator. *I'd look on Ebay for "refrigerator thermostat". # I'm sure you'll find a variety of form factors. Nope It's an uninsulated, unheated concrete "bunker" under a 3-season porch, that is intended as a tornado shelter, but serves mostly as a storage room. In winter, because it's partically exposed above ground level, the temperature drops to nearly the same temperature as outside. And yes, the idea is to keep it just above freezing, with minimal outlay of energy * * And no, it's not going to be insulated real soon. # Aside from that, if the goal is to keep things from freezing, # I'd go with at least 37F. *There can be considerable variation # in temps in a room. And ? * * Do you have a suggestion ?- Hide quoted text - - Show quoted text - I just gave you my two suggestions. One was to look on Ebay for REFRIGERATOR THERMOSTATS. The temp range you want is exactly that of refrigerators. And there are a wide variety of refrigerators, from home to walk-in rooms, so I'll bet you can find an appropriate one that you can use. The second was that if the intent was to keep things from freezing, you should set the thermostat at 37F or above, because there is likely considerable variation in temp from one spot in the room to another. How much variation depends on a number of factors that we don't know. Another factor you didn't specify was whether the thermostat has to be 24V or line voltage. |
Looking for thermostat to operate at near 32F - 0C
On Dec 3, 2:40*am, The Daring Dufas the-daring-du...@stinky-
finger.net wrote: On 12/2/2012 11:49 PM, Wes Groleau wrote: On 12-03-2012 21:31, grumpy wrote: Nope refrigerator Tst. works in opposite direction it must be one that controls heat Like most thermostats, it is either on or off. Swapping the two is trivial. Sorry Wes, you're wrong. Thermostats have what's called a "set-point" and commercial thermostats on food service and industrial process control systems have adjustable "cut-in" and "cut-out" set-points for operation of heating or cooling. Even your digital wall thermostat for heating and cooling your home may have an adjustable span which is the temperature band where it will remain quiescent. The older traditional mechanical wall thermostats have an adjustable heat anticipator for that purpose. All control systems have hysteresis built in for them to operate properly. ^_^ TDD OK, I see the point about refrigerator thermostats. The issue I overlooked was that they are obviously designed to close when the temp rises, which is the opposite of what is needed. Most probably can't be changed. However, if you look at the rest of my suggestion, which was to go to Ebay and search for "refrigerator thermostat", it was spot on. Here, for example is a Honeywell refrigerator thermostat that has both NC and NO contacts that will work: http://www.ebay.com/itm/NEW-HONEYWEL...em337e2a e3fc It's item 221160072188 if the above link doesn't work. Looking a few listings down, there is a pic of another thermostat that clearly has 3 terminals, suggesting it too, will support either heating or cooling. |
Looking for thermostat to operate at near 32F - 0C
Would be nice to have some kind of fan, circulating the air within the room.
That would help keep the temps even, so you don't freeze stuff at floor level. I realize the OP only has electric to work with. I think it's a good idea to look at running in natural gas, or some other energy source. Might be cheaper in the long run. Christopher A. Young Learn more about Jesus www.lds.org .. wrote in message ... The second was that if the intent was to keep things from freezing, you should set the thermostat at 37F or above, because there is likely considerable variation in temp from one spot in the room to another. How much variation depends on a number of factors that we don't know. Another factor you didn't specify was whether the thermostat has to be 24V or line voltage. |
Looking for thermostat to operate at near 32F - 0C
On Dec 3, 6:34*am, " Attila Iskander"
wrote: "nestork" wrote in message ... Attila Iskander Wrote: The intent is to block it from going below freezing. so that stuff like spare milk and canned/preserved foods don't freeze. Two things: A fridge or freezer thermostat wouldn't work because a fridge or freezer thermostat makes an electrical contact on a RISE in temperature. *So, it would work backward to what you want. *It would turn the heater on as the room warmed up rather than turning it on as the room cooled down. Look at my recent post near the top of the thread. There are refrigerator thermostats that have both sets of contacts, can be used for heating or cooling. Had not intention of salvaging a thermostat from a fridge or freezer Nor do I intend to do anything that requires fiddling I'm looking for and off the shelf, plug and play solution. What exactly does that mean? You haven't specified if the thermostat you need is even 24V or 120V? |
Looking for thermostat to operate at near 32F - 0C
wrote in message ... On Dec 2, 6:09 pm, " Attila Iskander" wrote: Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. Colder is. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? Here's one that fits the range that you want: http://www.grainger.com/Grainger/COL...817?Pid=search Some of the thermostats designed for home electric (baseboard) heating and which have a minimum setting of 40 degress F. will also work because they will actually hold a setting below the 40 mark. You would, however, have to mount the thermostat in a box with a cord and plug. Tomsic |
Looking for thermostat to operate at near 32F - 0C
Attila Iskander wrote: "nestork" wrote in message ... Attila Iskander Wrote: The intent is to block it from going below freezing. so that stuff like spare milk and canned/preserved foods don't freeze. Two things: A fridge or freezer thermostat wouldn't work because a fridge or freezer thermostat makes an electrical contact on a RISE in temperature. So, it would work backward to what you want. It would turn the heater on as the room warmed up rather than turning it on as the room cooled down. Had not intention of salvaging a thermostat from a fridge or freezer Nor do I intend to do anything that requires fiddling I'm looking for and off the shelf, plug and play solution. (And a couple have already been shown) Contrary to popular belief, you can freeze milk. I still remember watching newsreels in school that showed people buying frozen milk by the pound in Churchill, Manitoba. They would take it home, put it in a pail, let it melt and drink it. Been there done that. I like having liquid milk when one of the kids goes down to get the next bottle So that's why I intend to keep the room above freezing Once again the answer is http://mcmaster.com just search on thermostat and you will find plenty of choices from ordinary ones that go down to 40F, to "freeze protection" ones that go down to 14F. I see some with a range of -30F to +130F. |
Looking for thermostat to operate at near 32F - 0C
On 12/2/2012 9:33 PM, Attila Iskander wrote:
"Dean Hoffman" wrote in message ... It just dawned on me that livestock buildings might use something like the OP wants. One he http://tinyurl.com/cavslpu This one http://tinyurl.com/bl8cjpt almost installs itself. That seems to pretty well cover my specs. It will unlike some of the other suggestions do it at pretty low cost and ease of install.. Goes one my eval list Thank you Take a look at this one. Farm Innovators Thermo Cube Thermostatically Controlled Outlet by Farm Innovators Price: $12.72 Plugs into a standard 15 amp electrical outlet and turns power on automatically according to outside air temperature Saves money by using power only when temperatures require heating Two receptacles for use with more than one electrical device Turns on at 35°F, off at 45°F Ideal for home and farm applications such as pond de-icers, unheated rooms, pump houses, greenhouses, boats and RV's http://www.amazon.com/Farm-Innovator...upplies_text_y |
Looking for thermostat to operate at near 32F - 0C
On 12/2/2012 9:33 PM, Attila Iskander wrote:
"Dean Hoffman" wrote in message ... It just dawned on me that livestock buildings might use something like the OP wants. One he http://tinyurl.com/cavslpu This one http://tinyurl.com/bl8cjpt almost installs itself. That seems to pretty well cover my specs. It will unlike some of the other suggestions do it at pretty low cost and ease of install.. Goes one my eval list Thank you Take a look at this one. Farm Innovators Thermo Cube Thermostatically Controlled Outlet by Farm Innovators Price: $12.72 Plugs into a standard 15 amp electrical outlet and turns power on automatically according to outside air temperature Saves money by using power only when temperatures require heating Two receptacles for use with more than one electrical device Turns on at 35°F, off at 45°F Ideal for home and farm applications such as pond de-icers, unheated rooms, pump houses, greenhouses, boats and RV's http://www.amazon.com/Farm-Innovator...upplies_text_y |
Looking for thermostat to operate at near 32F - 0C
On Dec 2, 7:58*pm, " Attila Iskander"
wrote: Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. * * Colder is. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? Google "Frost stat" eg:- http://www.uk-plumbing.com/frost-the...Fe7MtAodylcAUA |
Looking for thermostat - thanks to all the responders
Thanks to all who responded Have my shopping list set. |
Looking for thermostat to operate at near 32F - 0C
"Stormin Mormon" wrote in message ... Would be nice to have some kind of fan, circulating the air within the room. That would help keep the temps even, so you don't freeze stuff at floor level. I realize the OP only has electric to work with. I think it's a good idea to look at running in natural gas, or some other energy source. Might be cheaper in the long run. Christopher A. Young Learn more about Jesus www.lds.org Intend to use small ceramic heater/fan Should take care of moving the air around to keep things balanced Space is only 10'x10'x'8'. So not much is required And I'm not willing to install a NG heater for this |
Looking for thermostat to operate at near 32F - 0C
Ceramic heater at floor level should do it.
Please let us know how it works out. Christopher A. Young Learn more about Jesus www.lds.org .. " Attila Iskander" wrote in message ... Intend to use small ceramic heater/fan Should take care of moving the air around to keep things balanced Space is only 10'x10'x'8'. So not much is required And I'm not willing to install a NG heater for this |
Looking for thermostat to operate at near 32F - 0C
On Mon, 3 Dec 2012 06:08:17 +0000, nestork
wrote: Attila Iskander Wrote: The intent is to block it from going below freezing. so that stuff like spare milk and canned/preserved foods don't freeze. Two things: A fridge or freezer thermostat wouldn't work because a fridge or freezer thermostat makes an electrical contact on a RISE in temperature. So, it would work backward to what you want. It would turn the heater on as the room warmed up rather than turning it on as the room cooled down. Contrary to popular belief, you can freeze milk. I still remember watching newsreels in school that showed people buying frozen milk by the pound in Churchill, Manitoba. They would take it home, put it in a pail, let it melt and drink it. Very simple. Use a NC relay and control it with the refrig t/stat |
Looking for thermostat to operate at near 32F - 0C
On 12/3/2012 6:54 AM, wrote:
On Dec 3, 2:40 am, The Daring Dufas the-daring-du...@stinky- finger.net wrote: On 12/2/2012 11:49 PM, Wes Groleau wrote: On 12-03-2012 21:31, grumpy wrote: Nope refrigerator Tst. works in opposite direction it must be one that controls heat Like most thermostats, it is either on or off. Swapping the two is trivial. Sorry Wes, you're wrong. Thermostats have what's called a "set-point" and commercial thermostats on food service and industrial process control systems have adjustable "cut-in" and "cut-out" set-points for operation of heating or cooling. Even your digital wall thermostat for heating and cooling your home may have an adjustable span which is the temperature band where it will remain quiescent. The older traditional mechanical wall thermostats have an adjustable heat anticipator for that purpose. All control systems have hysteresis built in for them to operate properly. ^_^ TDD OK, I see the point about refrigerator thermostats. The issue I overlooked was that they are obviously designed to close when the temp rises, which is the opposite of what is needed. Most probably can't be changed. However, if you look at the rest of my suggestion, which was to go to Ebay and search for "refrigerator thermostat", it was spot on. Here, for example is a Honeywell refrigerator thermostat that has both NC and NO contacts that will work: http://www.ebay.com/itm/NEW-HONEYWEL...em337e2a e3fc It's item 221160072188 if the above link doesn't work. Looking a few listings down, there is a pic of another thermostat that clearly has 3 terminals, suggesting it too, will support either heating or cooling. That's a mechanical version of the one in the link I posted elsewhere. I use thermostats of this type all the time because they are so versatile and easy to adjust via the keypad. ^_^ http://tinyurl.com/ccu2veo TDD |
Looking for thermostat to operate at near 32F - 0C
" Attila Iskander" wrote in message ... wrote in message ... Attila Iskander wrote: Looking for a thermostat to control a small heater in a cold room I have electricity and nothing else So the heater will be electric Need thermostat that will turn on at and below 32F, off above that The objective is to keep the room hovering just above freezing, about 32F-34F Warmer is not a problem. Colder is. Does anyone know of an off-the shelf plug-in thermostat that can be set for that range ? # # Well, let's see. You want it to maintain a temp just above # freezing. That's not a temp range for a house, but it is # for a refrigerator. I'd look on Ebay for "refrigerator thermostat". Nope refrigerator Tst. works in opposite direction it must be one that controls heat # I'm sure you'll find a variety of form factors. Nope It's an uninsulated, unheated concrete "bunker" under a 3-season porch, that is intended as a tornado shelter, but serves mostly as a storage room. In winter, because it's partically exposed above ground level, the temperature drops to nearly the same temperature as outside. And yes, the idea is to keep it just above freezing, with minimal outlay of energy And no, it's not going to be insulated real soon. # Aside from that, if the goal is to keep things from freezing, # I'd go with at least 37F. There can be considerable variation # in temps in a room. And ? Do you have a suggestion ? |
Looking for thermostat to operate at near 32F - 0C
wrote in message ... Very simple. Use a NC relay and control it with the refrig t/stat Can that be translated into plain English ? |
Looking for thermostat to operate at near 32F - 0C
Made perfect sense, to me. Use the Tstat, to signal the relay primary. When
the refrig stat is calling, that will invert the binary output, so as to make a NC signal for the secondary, instead of the NO (close on rise) signal from the Tstat. Really very simple. Scooter, try to stay awake. This is on the test, and yes, I can see you in the back row. Christopher A. Young Learn more about Jesus www.lds.org .. " Attila Iskander" wrote in message ... wrote in message ... Very simple. Use a NC relay and control it with the refrig t/stat Can that be translated into plain English ? |
Looking for thermostat to operate at near 32F - 0C
On Mon, 3 Dec 2012 20:34:25 -0600, " Attila Iskander"
wrote: wrote in message .. . Very simple. Use a NC relay and control it with the refrig t/stat Can that be translated into plain English ? Normally closed relay - then the thermostat energizes the coil and opens the contacts. |
Looking for thermostat to operate at near 32F - 0C
On 12/3/12 8:34 PM, Attila Iskander wrote:
wrote in message ... Very simple. Use a NC relay and control it with the refrig t/stat Can that be translated into plain English ? NC is normally closed. The normal position of relay and switch contacts is their position when no outside force is acting on the device. The refrigerator thermostat normally kicks the fridge on when the temp gets too high by closing a set of contacts. The thermostat would energize your relay to open the relay contacts if the temp was above your set point. They, in turn, would shut your heater off. The thermostat's contacts would open if the temperature gets below your set point. That would denergize the relay. The normally closed contacts of the relay would close. That would allow power through them to your heater. It would work fine but there are off the shelf products to do the same thing. |
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