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Sounds like a load calculation needs to be done. Seems like both are an overkill on the cooling side.

In both the heating and cooling mode a heat pump's amperage increases as the temperature increases. the amperage on the fan decreases as the filter or any air restriction increases.

Interior storm windows will perform as well as exterior storm windows (thermally) be careful to seal them well, as there is a chance if condensation forming between the wood window and the storm...

I agree with Redsheanazar

Assuming you have the qualifications to be an HVAC contractor, the only way your new business will go is up. If you are starting out light, get a good service truck (not like what Fred Sanford would...

Steve,
My site, www.johnrwhite.net, has a practice HVAC exam for NC. It will give you an idea of what you're in for. Having read a number of posts about who's state has the toughest exam, this test...

It's your money. If you have the stuff just laying around I bet you,d get a better ROI putting it in an HVAC system. I do not believe you need a dual fuel system though.

Your math is absolutely correct. Infact the average COP would be a little higher than 3 with a 13 seer/ 8 hspf heat pump

According to you description of outdoor temperatures it sounds like you may not even need a furnace or auxillary heat with a heat pump. Find a contractor with enough intelligence to perform a load...

If you'll send me the local electric rates, gas rates with furnace AFUE, a copy of the load calculation and the name of the nearest large city I'll calculate the temperature setting for you. The...