Hello, I recently completed a new barn that's 40'x60' with 12.5' walls and a concrete floor. It also has an open area in the upper level for storage that's about 12'x60'. I recently had the barn insulated with R19 in the walls and open cell foam in the ceiling. Before insulation, it would get to about 109 degrees on the upper level. Now on our hottest day of the summer (93 deg with 107 deg heat index) with insulation, it doesn't get hotter than 85 deg and the main level around 82. I was really impressed by the difference!
In the winter, I'm planning to heat the building with my outdoor wood furnace mainly to keep the building above freezing. As far as A/C, my neighbor who works for an HVAC company said I'd need a 5 ton system. I'm already on the fence about whether I need A/C at all after the insulation, but if I do want to add it, it seems like 5 ton would too large. Does this seem like the correct size or would a smaller unit be more appropriate? Thanks.
In the winter, I'm planning to heat the building with my outdoor wood furnace mainly to keep the building above freezing. As far as A/C, my neighbor who works for an HVAC company said I'd need a 5 ton system. I'm already on the fence about whether I need A/C at all after the insulation, but if I do want to add it, it seems like 5 ton would too large. Does this seem like the correct size or would a smaller unit be more appropriate? Thanks.
