Heat Pumps and Electric Heating - Heat Pump
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Nouni
04-25-08, 08:38 AM
I am in the way to buy a heat pump.
I am looking for Amana 16SEER (and 9.5 HSPF most important for me because I use more heating than cooling)
1) How to calculate the heat pump size for a split level (3 levels) with 2000 sq feet to be heated. ? Some tall me 2T others 3T. I understood that 2T not enough to heat, and 3T will freeze
2) for 2 stages scroll compressor is it necessary to have a motor furnace with 2 speeds ?
I am looking for Amana 16SEER (and 9.5 HSPF most important for me because I use more heating than cooling)
Thanks for your advices.
Regards
I am looking for Amana 16SEER (and 9.5 HSPF most important for me because I use more heating than cooling)
1) How to calculate the heat pump size for a split level (3 levels) with 2000 sq feet to be heated. ? Some tall me 2T others 3T. I understood that 2T not enough to heat, and 3T will freeze
2) for 2 stages scroll compressor is it necessary to have a motor furnace with 2 speeds ?
I am looking for Amana 16SEER (and 9.5 HSPF most important for me because I use more heating than cooling)
Thanks for your advices.
Regards
Matt Gruber
04-25-08, 10:41 AM
how many btu is your current heater? is it good enough? is it oil? gas/ el? wood?
to keep from freezing with a biggie ac u need a crafty device called a thermostat(commercial adj. swing type).
to keep from freezing with a biggie ac u need a crafty device called a thermostat(commercial adj. swing type).
Nouni
04-25-08, 11:00 AM
My actual heating is a oil furnace 117 000 Btu.
But it is seems to big for my house with a 2000 sf heated surface.
With the oil price I decided to install a HP with a high HSPF minimum 9.
But it is seems to big for my house with a 2000 sf heated surface.
With the oil price I decided to install a HP with a high HSPF minimum 9.
Matt Gruber
04-25-08, 12:03 PM
My actual heating is a oil furnace 117 000 Btu.
But it is seems to big for my house with a 2000 sf heated surface.
With the oil price I decided to install a HP with a high HSPF minimum 9.
do u want to supplement the oil heat with cheap to operate electric heat pump on 40-60F days?(great idea)
or do u want to totally eliminate the oil(bad idea imo)
But it is seems to big for my house with a 2000 sf heated surface.
With the oil price I decided to install a HP with a high HSPF minimum 9.
do u want to supplement the oil heat with cheap to operate electric heat pump on 40-60F days?(great idea)
or do u want to totally eliminate the oil(bad idea imo)
Nouni
04-25-08, 02:59 PM
I want the first solution : to use heat pump to supplement the oil heat by operating the HP on 40-60F days
Ed Imeduc
04-25-08, 03:17 PM
Lets look at this another way first.Go to http://www.warmair.net Compare the fuel cost for where you are.Get 3 bids for the job. Make sure they run a J manual
so they come up with what the heat loss and AC load is in the home. We do have a 2.5 ton heatpump. If thats what you need there. I sure cant see a 117K in on a oil burner for a 200sq ft home. If you go this way with oil and H/P be sure they have a good dual H/P control kit on the system
so they come up with what the heat loss and AC load is in the home. We do have a 2.5 ton heatpump. If thats what you need there. I sure cant see a 117K in on a oil burner for a 200sq ft home. If you go this way with oil and H/P be sure they have a good dual H/P control kit on the system
Matt Gruber
04-25-08, 04:27 PM
I want the first solution : to use heat pump to supplement the oil heat by operating the HP on 40-60F days
like ed says, do your research.
look carefully at what you will pay, and the btu output.
The standard J is the MINIMUM; a good base, then look at the additional cost and figure is more btu worth the expense. The reward will be decent heat at slightly lower temps(like 35F vs. 40-45). In my case going from 2 ton to 3 ton was only ~$300 more for 50% more output. The new 2 speed HP can run on low for excellent ac w/ larger size.
like ed says, do your research.
look carefully at what you will pay, and the btu output.
The standard J is the MINIMUM; a good base, then look at the additional cost and figure is more btu worth the expense. The reward will be decent heat at slightly lower temps(like 35F vs. 40-45). In my case going from 2 ton to 3 ton was only ~$300 more for 50% more output. The new 2 speed HP can run on low for excellent ac w/ larger size.
Nouni
04-25-08, 06:39 PM
What is J manual ?
I met 2 contractors no one said the same thing.
For one, 36000 Btu is a must, size are more important than HSPF (8 is enough), i
For the other one, more the HSPF is better (mini 9), the size less important 2 tonnes is enough. He told that you do not calculate the basement (600SF) in the size of the house, only the main floor (1400 SF).
Also the 1st told me I dont need a 2 stages compressor because my furnace blower is not à 2 speeds.
The 2ed toll me I 2 stage compressor is better I save money and I dont need 2 speeds furnace blower.
I visited a lot of web sites to learn more.
A lot of thanks.
I met 2 contractors no one said the same thing.
For one, 36000 Btu is a must, size are more important than HSPF (8 is enough), i
For the other one, more the HSPF is better (mini 9), the size less important 2 tonnes is enough. He told that you do not calculate the basement (600SF) in the size of the house, only the main floor (1400 SF).
Also the 1st told me I dont need a 2 stages compressor because my furnace blower is not à 2 speeds.
The 2ed toll me I 2 stage compressor is better I save money and I dont need 2 speeds furnace blower.
I visited a lot of web sites to learn more.
A lot of thanks.