EcoRenovator - View Single Post - Home Heat Loss Calculator = Energy Simulation Tool

MN Renovator · 11-30-10, 07:20 PM

Thanks for this.

I calculated as 26746 for everything above grade. Based on the heat output of my furnace and last years therms calculated into CCF using the value of heat from the gas and then calculating run time of the furnace. I'm sitting at 6.55 calculated hours of run time as a daily average for January with an 75000 btu input, 57000 btu output furnace. Either a modular furnace 45000 btu high and 30000 btu low or just a 35000 btu furnace would probably do the trick. I think 35000 btu is about as small as you can buy them.

I figure this tool is probably pretty close to matching my guess of somewhere between 30000-45000 btu from a 95+ efficiency furnace even though I have no clue what insulation is between the walls and the outside.

11-30-10, 07:20 PM	#3
MN Renovator Less usage=Cheaper bills Join Date: Nov 2010 Location: Minneapolis, MN Posts: 939 Thanks: 41 Thanked 116 Times in 90 Posts	Thanks for this. I calculated as 26746 for everything above grade. Based on the heat output of my furnace and last years therms calculated into CCF using the value of heat from the gas and then calculating run time of the furnace. I'm sitting at 6.55 calculated hours of run time as a daily average for January with an 75000 btu input, 57000 btu output furnace. Either a modular furnace 45000 btu high and 30000 btu low or just a 35000 btu furnace would probably do the trick. I think 35000 btu is about as small as you can buy them. I figure this tool is probably pretty close to matching my guess of somewhere between 30000-45000 btu from a 95+ efficiency furnace even though I have no clue what insulation is between the walls and the outside.