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No vent-free means the moisture is not vented to the outside, as the heater is vent free. What you want is a direct vent heater. Heaters will be deeply discounted pretty soon. The big boxes will be looking to rid themselves winter of inventory.
I'm wondering if this will for find for an 8 x 10 shack? Being it says vent free does that mean all the moisture is automatically pushed to the outside by it?http://www.mrheater.com/product.aspx?catid=57&id=174
So if i did install one such as this http://reviews.northerntool.com/0394/177218/procom-vent-free-propane-ice-house-heater-10-000-btu-300-sq-ft-heating-area-reviews/reviews.htm or this http://www.mrheater.com/product.aspx?catid=57&id=174 id have to vent the shack to prevent moisture from building up in the shack?
So in other words with the 2 systems i posted above would work great just make sure shack is properly vented and have a CO detector at all times
Ok. That is great info guys thanks. I guess my next question is is there anything special you have to do to the wall where it will be mounted? We will have standard insulation throughout the shack and some sore of material over that.
A direct vent heater draws fresh air for combustion from outside and vents combustion to the outside through the side of the shack. A heater that isn't direct vent uses air from inside the shack for combustion and gasses plus moisture resulting from combustion are released into the inside of the shack.
Should i also install a small fan on the highest point of the shack and if so what size?