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TimJFowler · 02-16-12, 02:50 PM

We just received our Jan/Feb Natural Gas Bill and I was able to calculate how much of a difference the new programmable thermostat made.

'Dumb' Thermostat Natural Gas Usage

Jan 12 - Feb 9, 2011 (28 days)
Natural Gas used = 60.8 Therms @ $58.37
Heating Degree Days = 1029
Therms per Heating Degree Day = 0.0590

Programmable Thermostat Natural Gas Usage

Jan 10 - Feb 8, 2012 (29 days)
Natural Gas used = 51 Therms @ $47.03
Heating Degree Days = 911
Therms per Heating Degree Day = 0.0559
5.1% Reduction in Natural Gas Used

While a 5% reduction may not seem like much, I work from home and don't set the heat back during the day. The payback period on the programmable thermostat ($25 +tax) should be about 1.5 years.

All told, we have cut our Natural Gas used for space heating by 49%. Not bad for a few insulation and air-sealing projects on our 'normal' suburban home. I've gone into more detail on the results here: A Thermostat That's Smarter by Half | EcoDaddyo.com

Step by step,
Tim

02-16-12, 02:50 PM	#9
TimJFowler Apprentice EcoRenovator Join Date: Dec 2008 Location: Santa Fe, NM Posts: 184 Thanks: 9 Thanked 12 Times in 11 Posts	Results = 5% Less Natural Gas Used We just received our Jan/Feb Natural Gas Bill and I was able to calculate how much of a difference the new programmable thermostat made. 'Dumb' Thermostat Natural Gas Usage Jan 12 - Feb 9, 2011 (28 days) Natural Gas used = 60.8 Therms @ $58.37 Heating Degree Days = 1029 Therms per Heating Degree Day = 0.0590 Programmable Thermostat Natural Gas Usage Jan 10 - Feb 8, 2012 (29 days) Natural Gas used = 51 Therms @ $47.03 Heating Degree Days = 911 Therms per Heating Degree Day = 0.0559 5.1% Reduction in Natural Gas Used While a 5% reduction may not seem like much, I work from home and don't set the heat back during the day. The payback period on the programmable thermostat ($25 +tax) should be about 1.5 years. All told, we have cut our Natural Gas used for space heating by 49%. Not bad for a few insulation and air-sealing projects on our 'normal' suburban home. I've gone into more detail on the results here: A Thermostat That's Smarter by Half \| EcoDaddyo.com Step by step, Tim __________________ - DIY Adventures in Applied Sustainability - To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.