Thermostat to turn on fan when it's hot ???
wrote in message ... I just put a fan in the gable of my barn so my indoor farm animals are not overheating on hot days. Rather than buying a commercial barn fan, which is costly and most are too big for my small barn anyhow. I bought a used fan that is intended to be used as an exhaust fan. I already had a vent up there, so I just mounted the fan over tbe vent inside the barn. However, I dont want this fan running all the time. Only when the temperature gets about a specific temperature up there at the roof line. I am assuming it should turn on around 85 degrees. and off at 70 deg. I have been looking for a way to install a thermostat, but as simply as possible. To install a standard heating - cooling thermostat like the types used in a house for furnace and AC, would require a transformer and quite a bit of wiring. Not that it's out of the question, but I am thinking there must be an easier way, where the thing is simply installed in the 120vac line, right next to the fan. I know they make devices like this for portable and baseboard electric heaters. But those will be just the opposite of what I want to do. (it would switch on at the low temp and on at the high - That's backward). But something similar to that is what I am hoping to find. Does anyone have any suggestions? I do have an old air conditioner with a dead compressor. Could something be salvaged from that? I'm always looking to save a buck if I can salvage something from junk. Try these: http://www.littlegreenhouse.com/acce...controls.shtml |
It called an attic fan thermostat-- Graingers has them
http://www.grainger.com/Grainger/sea...ttic+Fan&xi=xi wrote in message ... I just put a fan in the gable of my barn so my indoor farm animals are not overheating on hot days. Rather than buying a commercial barn fan, which is costly and most are too big for my small barn anyhow. I bought a used fan that is intended to be used as an exhaust fan. I already had a vent up there, so I just mounted the fan over tbe vent inside the barn. However, I dont want this fan running all the time. Only when the temperature gets about a specific temperature up there at the roof line. I am assuming it should turn on around 85 degrees. and off at 70 deg. I have been looking for a way to install a thermostat, but as simply as possible. To install a standard heating - cooling thermostat like the types used in a house for furnace and AC, would require a transformer and quite a bit of wiring. Not that it's out of the question, but I am thinking there must be an easier way, where the thing is simply installed in the 120vac line, right next to the fan. I know they make devices like this for portable and baseboard electric heaters. But those will be just the opposite of what I want to do. (it would switch on at the low temp and on at the high - That's backward). But something similar to that is what I am hoping to find. Does anyone have any suggestions? I do have an old air conditioner with a dead compressor. Could something be salvaged from that? I'm always looking to save a buck if I can salvage something from junk. Anyone? Thanks Mark |
I believe the 110V thermostats have either normally closed or open
contacts, so you can choose heating or cooling mode. Just keep in mind the T-stat should be mounted close to the roof. What I would do is also put it in series with a switch down at ground level so you can shut off the fan whenever you don't want it on. |
I think they are commonly called "attic thermostats". They are available in
line voltage. Try Graingers. Or you could get a line voltage cooling thermostat. Same deal. -- Christopher A. Young Learn more about Jesus www.lds.org www.mormons.com wrote in message ... I just put a fan in the gable of my barn so my indoor farm animals are not overheating on hot days. Rather than buying a commercial barn fan, which is costly and most are too big for my small barn anyhow. I bought a used fan that is intended to be used as an exhaust fan. I already had a vent up there, so I just mounted the fan over tbe vent inside the barn. However, I dont want this fan running all the time. Only when the temperature gets about a specific temperature up there at the roof line. I am assuming it should turn on around 85 degrees. and off at 70 deg. I have been looking for a way to install a thermostat, but as simply as possible. To install a standard heating - cooling thermostat like the types used in a house for furnace and AC, would require a transformer and quite a bit of wiring. Not that it's out of the question, but I am thinking there must be an easier way, where the thing is simply installed in the 120vac line, right next to the fan. I know they make devices like this for portable and baseboard electric heaters. But those will be just the opposite of what I want to do. (it would switch on at the low temp and on at the high - That's backward). But something similar to that is what I am hoping to find. Does anyone have any suggestions? I do have an old air conditioner with a dead compressor. Could something be salvaged from that? I'm always looking to save a buck if I can salvage something from junk. Anyone? Thanks Mark |
Another source is the local home center, eg HD, etc. Then should have
replacement ones for attic fans. I'd make sure that fan is properly fire rated for where you're using it too, ie that it has a thermal cut off. |
wrote in message ... I just put a fan in the gable of my barn so my indoor farm animals are not overheating on hot days. Rather than buying a commercial barn fan, which is costly and most are too big for my small barn anyhow. I bought a used fan that is intended to be used as an exhaust fan. I already had a vent up there, so I just mounted the fan over tbe vent inside the barn. However, I dont want this fan running all the time. Only when the temperature gets about a specific temperature up there at the roof line. I am assuming it should turn on around 85 degrees. and off at 70 deg. I have been looking for a way to install a thermostat, but as simply as possible. To install a standard heating - cooling thermostat like the types used in a house for furnace and AC, would require a transformer and quite a bit of wiring. Not that it's out of the question, but I am thinking there must be an easier way, where the thing is simply installed in the 120vac line, right next to the fan. I know they make devices like this for portable and baseboard electric heaters. But those will be just the opposite of what I want to do. (it would switch on at the low temp and on at the high - That's backward). But something similar to that is what I am hoping to find. Does anyone have any suggestions? I do have an old air conditioner with a dead compressor. Could something be salvaged from that? I'm always looking to save a buck if I can salvage something from junk. Anyone? Thanks Mark This is Turtle. most thermostats on window units have a range of 64ºF to 90ºF and would do fine for turning you fan on when you needed it to. so rob the thermostat out of the old window unit and use it to control it. TURTLE |
Rus wrote in
. 204.17: wrote in : I just put a fan in the gable of my barn so my indoor farm animals are not overheating on hot days. Rather than buying a commercial barn fan, which is costly and most are too big for my small barn anyhow. I bought a used fan that is intended to be used as an exhaust fan. I already had a vent up there, so I just mounted the fan over tbe vent inside the barn. However, I dont want this fan running all the time. Only when the temperature gets about a specific temperature up there at the roof line. I am assuming it should turn on around 85 degrees. and off at 70 deg. I have been looking for a way to install a thermostat, but as simply as possible. To install a standard heating - cooling thermostat like the types used in a house for furnace and AC, would require a transformer and quite a bit of wiring. Not that it's out of the question, but I am thinking there must be an easier way, where the thing is simply installed in the 120vac line, right next to the fan. I know they make devices like this for portable and baseboard electric heaters. But those will be just the opposite of what I want to do. (it would switch on at the low temp and on at the high - That's backward). But something similar to that is what I am hoping to find. Does anyone have any suggestions? I do have an old air conditioner with a dead compressor. Could something be salvaged from that? I'm always looking to save a buck if I can salvage something from junk. Anyone? Thanks Mark For my torpedo shaped kerosene heater, I purchased the optional thermostat for about $35 at Home Depot. Has male prongs and female receptacle slots both in one plug. Insert thermostat plug into current outlet. Insert fan plug into thermostat plug, dial in temp from about 40 to 90. If this link works, here's a pictu http://www.tools- plus.com/masha1210.html Uses 110v current. No transformer needed. In the winter, take it off the vent fan and use it on your torpedo heater. (I'm a poor man. I look for multiple functions for everything I buy.) //rus// Forget that. I'm such an idiot. T-stat for a heater works backwards regarding your needs. Heater t-stat will turn off your fan when it gets hot ... that's no good. Sorry. //rus// |
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