heating a 300sf insulated sealed room

[bearskinner]

I finished off building a 11x24' tool room, workshop inside my big shop. While building it during the winter, I used a Mr Buddy heater to keep warm, but with moisture issues I hear about I want to find a DRY kind of heat for this winter. The walls are 6" thick open cell foam, and ceiling is 8" thick open cell. OSB inside and out, all seams and outlets are caulked, oil base primed and painted. the room is TOTALLY sealed with an exterior door and dual pane window. I have a good sized dehumidifier inside, that I use when Im running the propane heater, but I would like to have a heat source that is dry, fairly inexpensive, and will keep the room above 40 degrees all winter, and warmer when Im inside tinkering. I would like something with a thermostat that can be set to 40-50 while im gone. DRY is the big issue. I keep my tool box in there, and all my power tools etc. I was given a brand new Propane wall heater, blue flame non vented, but think this will add moisture to the room. Looking for some ideas......

 

[DEnd]

I can't vouch for the product but you probably want something like this:

http://www.northerntool.com/shop/tools/product_200649096_200649096

 

[Heiny57]

I would think a small 240 volt electric heater would heat that space with as well as it is insulated. I heat a 21 x 28 garage, 2x4 walls and a non insulated aluminum door just fine with a portable.

Electric dries the air.

 

[theoldwizard1]

.. but I would like to have a heat source that is dry, fairly inexpensive, and will keep the room above 40 degrees all winter, ...

Electric resistance IS dry ! So is a mini-split.

 

[dfiler2]

Any of those ideas will work for you, I have my tool room heated with electric baseboard. If you want to stay with propane just make sure it is a direct vent unit as posted above, those use outside air for combustion and vent the exhaust to the outside.

 

[bearskinner]

Electric resistance IS dry ! So is a mini-split.

ok, what is a mini-split?

 

[DEnd]

ok, what is a mini-split?

a Heat pump. They tend to use inverter driven compressors, which allow them to keep their outdoor coils frost free to colder temps than traditional heat pumps. Some of these are able to produce heat down to --13ºF and below. They probably aren't cost effective for 300 sqft kept at low temps.

 

[Marctrees]

In my view, absolutely no question what I would do, and have done before.
By far best bang for the buck.
Two of these or similar 1500w 120 portable heaters such as below- done!

http://www.northerntool.com/shop/tools/product_200631840_200631840