I'm a senior in college trying to finish up my senior paper, but I'm stuck on calculating the heating and cooling load of a single family residence. Basically, I am comparing a normal home (natural gas furnace and split system central air) to one with passive solar considerations and a geothermal heat pump. I have used some free online programs and tried to calculated it myself, but the numbers never seem right.
So my question is really are there any free resources to calculate heating and cooling load? And also, what should i expect the heating and cooling load of a 2,400 square foot in New Jersey to be?
Thanks in advance.