Electric Heat Replacement Options

SIKSUKR · 02-07-2018, 01:58 PM

Having an ac system already installed with the duct work in place, another option would be to replace your exterior ac unit with a heat pump to get both heat and ac and use the existing ducting. I had about 20 of these at my former mill building.

thinkxingu · 02-07-2018, 02:32 PM

Quote:

Originally Posted by SIKSUKR

Having an ac system already installed with the duct work in place,another option would be to replace your exterior ac unit with a heat pump to get both heat and ac and use the existing ducting.I had about 20 of these at my former mill building.

This was one of the options I was considering. My summer monthly electric bill, with AC, dehumidifier, and electric appliances is around $120, which I don't think is horrible.

The real issue is heating, and I'm trying to weigh the gas, boiler, and baseboard installations (current AC ducts are only in attic) with a heat pump/mini splits.

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SIKSUKR · 02-07-2018, 03:13 PM

FYI. You would actually probably have to replace your heat exchanger also. They are usually matched units for size/output.

FlyingScot · 02-07-2018, 05:05 PM

I disagree that Cobalt's analysis is fair. As he notes, he has not included all the incentives from the government and utilities.

In Massachusetts, solar systems typically have a payback period of 6-7 years and an IRR (this is the return that should be used to compare this to other investments) of over 15%. Those are super numbers--significantly higher than one would expect from the stock market, just for example.

8gv · 02-07-2018, 06:58 PM

NH Solar:

Is there a material that can be installed on the ground to better capture the reflective energy in the summer?

upthesaukee · 02-07-2018, 07:29 PM

Quote:

Originally Posted by 8gv

NH Solar:

Is there a material that can be installed on the ground to better capture the reflective energy in the summer?

Maybe white landscaping rock (gravel)?

Dave

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02-07-2018, 01:58 PM	#1
SIKSUKR Senior Member Join Date: Apr 2004 Posts: 5,075 Thanks: 215 Thanked 903 Times in 509 Posts	Having an ac system already installed with the duct work in place, another option would be to replace your exterior ac unit with a heat pump to get both heat and ac and use the existing ducting. I had about 20 of these at my former mill building. __________________ SIKSUKR

02-07-2018, 03:13 PM	#3
SIKSUKR Senior Member Join Date: Apr 2004 Posts: 5,075 Thanks: 215 Thanked 903 Times in 509 Posts	FYI. You would actually probably have to replace your heat exchanger also. They are usually matched units for size/output. __________________ SIKSUKR

02-07-2018, 05:05 PM	#4
FlyingScot Senior Member Join Date: Jun 2016 Location: Tuftonboro and Sudbury, MA Posts: 2,460 Thanks: 1,347 Thanked 1,047 Times in 651 Posts	I disagree that Cobalt's analysis is fair. As he notes, he has not included all the incentives from the government and utilities. In Massachusetts, solar systems typically have a payback period of 6-7 years and an IRR (this is the return that should be used to compare this to other investments) of over 15%. Those are super numbers--significantly higher than one would expect from the stock market, just for example.

02-07-2018, 06:58 PM	#5
8gv Senior Member Join Date: Jan 2012 Posts: 2,121 Thanks: 64 Thanked 751 Times in 485 Posts	NH Solar: Is there a material that can be installed on the ground to better capture the reflective energy in the summer?