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Old 12-29-2008, 06:00 PM   #1
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Big bills with my Infinity 80 Carrier!! Help


New Jersey December posts a 37deg average and I spent $280 to buy 170 therms. I have a small house,,,,,,main floor and finished basement. I am running an Energy Recovery Ventilator and temps at ~ 69deg. My last house had beautiful hydroponic (hot water) heat. In Bklyn.....good ol radiators!
I know forced air is today's way of saving money in building homes. Personally,I hate it but was forced to upgrade $$$ nonetheless. Air GrOUP INSTALLED and I have a call out.
So....is 170 therms reasonable for a smaller home....at least in the ballpark?

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Old 12-29-2008, 06:25 PM   #2
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Big bills with my Infinity 80 Carrier!! Help


170 therms is equivalent to 17.51M btu's. That's equivalent to around 125 gallons of No. 2 heating oil. That doesn't seem out of line for New Jersey in December. You may want to consider some insulation upgrades for your next project if this seems high to you. Can you describe the condition of the house/insulation/windows.
BTW hot water baseboards are "hydronic", "hydroponics" is a totally different discussion...

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Old 12-29-2008, 06:35 PM   #3
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Big bills with my Infinity 80 Carrier!! Help


The house was newly renovated 4 years ago. Had some rooms added on. Air Group guys say it's very "tight". I will say windows pass very little air. Again, the house is small.... kitchen, dining and living room are basically one room. Then I have 2 small baths and 3 small bedrooms. Basement is a low ceiling ~ 1 big room. I thought this new Carrier stuff was the real deal! Man, I wish for the old systems....
And sorry about that hot water heat error!
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Old 12-29-2008, 06:46 PM   #4
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Big bills with my Infinity 80 Carrier!! Help


Not a problem(I like my hydronic system too). There's a couple HVAC guys on here that may be able to give you some advice on how to improve the efficiency.
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Old 12-29-2008, 07:08 PM   #5
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Big bills with my Infinity 80 Carrier!! Help


Air leakage is one issue. Loss of heat thru radiation is another. There are companies that can do an infrared scan to see where you are losing most of your heat from and I would inquire about that. I have a HRV which is similar. Does yours run continuously? If so why? Was it setup and balanced properly? Hydroponics are popular here and not just for growing tomatoes in the Winter.

Last edited by yuri; 12-29-2008 at 07:11 PM.
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Old 12-29-2008, 07:43 PM   #6
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Big bills with my Infinity 80 Carrier!! Help


My ventilator does run continually and I did wonder about its impact. I will ask my installers
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Old 12-30-2008, 06:48 AM   #7
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Big bills with my Infinity 80 Carrier!! Help


Your ERV may be less then 50% efficient.

How many CFM's is it set to bring in.

Its most likely that it is your main cause for the high heating bill.

If its bringing in 150CFM 24/7, and is 50% efficient, it causing an additional 17.5 terms a month to be used.

What you call very little air leakage around the windows, may be a lot more then you think.

Did Air Group guys, do a blower door test on your house?

If not, how do they know how tight it is.

Next, where is the combustion air coming from for the furnace.

Caulk around those windows. Put seals in all receps and switches on outside walls. And you'll start to save dome noney.

Set that ERV, to only run at about 60 to 75 CFM, if your going to run it 24/7

Keep in mind, that its still only an 80% efficient furnace, not 95%.

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