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 ?

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.

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.

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.

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.

"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.

"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.

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 ?

" 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

"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

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

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.

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.

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

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.

On 12/2/2012 3:52 PM, wrote:
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.


Most household thermostats I've seen go down to 40-45°F which I suppose
is warm enough to keep a whole dwelling above freezing. My digital goes
down to 45°F. Here's a link to a digital thermostat of the type I use on
walk in coolers for food service and it has a very flexible set-point
which makes it very useful for many applications. The type by
different manufacturers is available at any refrigeration/HVAC or any
industrial supplier. ^_^

http://www.etcsupply.com/ranco-etc11...FQY5nAodyzgAYA

http://tinyurl.com/ccu2veo

TDD

"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

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

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.

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

"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

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.

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.

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.

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?

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

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.

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

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

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

Thanks to all who responded

Have my shopping list set.

"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

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

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

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

" 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 ?

wrote in message
...


Very simple. Use a NC relay and control it with the refrig t/stat

Can that be translated into plain English ?

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 ?

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.

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.