Air Source Heat Pump Evaluation in Vermont by VT-DPS

VT-Department of Public Service found, after a survey of 77 HPs installed in 65 Vermont buildings:


- The annual energy cost savings were, on average, $200/y, but the annual maintenance, and annual amortizing costs (at 3.5%/y for 15 years) would turn that gain into a loss of at least $200/y.


- On average, the HPs provided 27.6% of the annual space heat, and traditional fuels provided 72.4%. These numbers are directly from the survey data. The small percentage of displaced fossil fuel heat indicates HPs would not be effective CO2 reducers in the cold climate of Vermont, if used in average VT houses.


- Owners started to turn off their HPs at about 28F to 30F, because their past experience showed significant increases in electricity bills, if they had not turned them off.


- Very few owners were using their HPs at 10F and below, as shown by the decreasing kWh consumption totals on figure 14 of URL.

- At those temperatures, the hourly cost of operating HPs exceeded the hourly cost of using a traditional heating system.

- This statement is true for average Vermont houses, which comprise about 90% of the Vermont housing stock.


- On average, an HP consumed 2,085 kWh during the heating season, of which:


1) To outdoor unit (compressor, outdoor fan, controls) + indoor air handling unit (fan and supplemental electric heater, if used), to provide space heat 1,880 kWh;

2) Standby mode 76 kWh, or 100 x 76/2085 = 3.6%;

3) Defrost mode 129 kWh, or 100 x 129/2085 = 6.2%. Defrost starts at about 37F and ends at about 10F.


- Turnkey cost for a one-head HP system is about $4,500; almost all houses had just one HP, which would be insufficient to heat an entire house. See URLs.


On average, these houses were highly unsuitable for HPs, and the owners were losing money.


NOTE: Coefficient of Performance, COP = heat delivered to house/electrical energy to HP

See page 10 of URL


Displaced Fuel Percentage of Vermont Heat Pumps, based on survey


As a result of a few years of complaints by various HP users, mainly about energy cost savings being much less than stated on the RE websites of Efficiency Vermont, GMP, VPIRG, etc., VT-DPS was ordered by the Vermont Legislature to hire a consultant to perform a survey.


CADMUS, the consultant, gathered the operating data of 77 HPs at 65 sites, to determine annual energy cost savings of the heat pumps.


CADMUS calculated:


- Space heat to all sites was 65 x 92 million Btu/site = 5,980 million Btu from all fuels. See URL, page 22

- Heat from HPs was 77 x 21.4 million Btu/HP = 1,648 million Btu. See URL, page 21

- Traditional systems provided 5980 – 1648 = 4,332 million Btu, or 4332/5980 = 72.4% of the total space heat.


This proves ASHPs, in average VT houses, are an expensive, non-solution regarding: 1) reducing CO2, 2) fighting climate change, and 3) saving the world.


Such "non-solutions" are the inevitable result of self-serving, subsidy-seeking, RE businesses working together with career RE bureaucrats, behind closed doors


The energy cost savings were an average of about $200/HP per year, instead of the $1,200/y to $1,800/y bandied about by RE folks and Efficiency Vermont, GMP, VPIRG, VT-DPS, VEIC, etc.


After the CADMUS report, those estimates disappeared from the websites.

All the data in Table 1 are from the CADMUS report. See URLs.

Table 4/Space heat, per CADMUS


Million Btu/site

 Million Btu


Heat to sites




 See URL, page 22


 Million Btu/HP


Heat from HPs






See URL, page 21

Heat from traditional





Million Btu/site


Heat from HPs, on average




Heat from traditional, on average

92.00 – 25.35 = 66.65







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Comment by Willem Post on February 17, 2022 at 6:23am


"no such file"

What file were you looking for?

Which URL were you not able to get?

Comment by Thinklike A. Mountain on February 17, 2022 at 12:27am

MUST SEE: President Trump Releases New Video – “Justice Is Coming for Hillary”

Comment by Kenneth Capron on February 16, 2022 at 11:33pm


No Such File

Did anyone grab a copy of that PDF file?? Its gone now!!

Comment by Willem Post on February 16, 2022 at 9:06pm


All are birds of the same feather.

They claim to be “discussing”, to put on a show.

All has already been decided.

Vermonters have near-zero input; they are sooo screwed!


Comment by Monique Aniel Thurston on February 16, 2022 at 8:23pm

Meanwhile today in Vermont today :" House Energy & Technology will discuss and possibly vote on the Clean Heat Standard, a cap-and-trade scheme to get fossil fuel dealers to fund state programs for non-fossil fuel heating systems. At 3:45 today it also will discuss H518, providing funding for municipalities to transition from fossil-fuel to non-fossil fuel heat in municipal buildings "

Comment by Willem Post on February 16, 2022 at 7:30am



At least 90% of Vermonters live in energy hog houses. Such houses were fine, when low-cost wood and other fuels were cheap.


As a result, COLD CLIMATE heat pumps, in energy hog house, are UNECONOMICAL at about 32F, and colder, compared to efficient oil, gas, propane furnaces, which also produce domestic hot water.




All this is well known to the energy engineers at Efficiency Vermont, VT-DPS, VT-PUC, VELCO, GMP, EAN, VEIC, and folks on the unconstitutional GWSA committee, and legislators on the Environment/Energy Committees. They all hold hands singing the same songs.


They would never publicly admit heat pumps are an economic bust, unless your house is highly sealed and highly insulated, and arranged for passive solar gain


That would significantly reduce the market for HPs to only THOSE houses


That would greatly upset their carefully crafted their HP installation goals


Collectively, they have a big horn to drown out everyone, and spread their version of the truth; a version of oppressive, coercive “Democracy”. Most of the VT-go-with-flow Media is helping out


Maine as Third World Country:

CMP Transmission Rate Skyrockets 19.6% Due to Wind Power


Click here to read how the Maine ratepayer has been sold down the river by the Angus King cabal.

Maine Center For Public Interest Reporting – Three Part Series: A CRITICAL LOOK AT MAINE’S WIND ACT


(excerpts) From Part 1 – On Maine’s Wind Law “Once the committee passed the wind energy bill on to the full House and Senate, lawmakers there didn’t even debate it. They passed it unanimously and with no discussion. House Majority Leader Hannah Pingree, a Democrat from North Haven, says legislators probably didn’t know how many turbines would be constructed in Maine if the law’s goals were met." . – Maine Center for Public Interest Reporting, August 2010 Part 2 – On Wind and Oil Yet using wind energy doesn’t lower dependence on imported foreign oil. That’s because the majority of imported oil in Maine is used for heating and transportation. And switching our dependence from foreign oil to Maine-produced electricity isn’t likely to happen very soon, says Bartlett. “Right now, people can’t switch to electric cars and heating – if they did, we’d be in trouble.” So was one of the fundamental premises of the task force false, or at least misleading?" Part 3 – On Wind-Required New Transmission Lines Finally, the building of enormous, high-voltage transmission lines that the regional electricity system operator says are required to move substantial amounts of wind power to markets south of Maine was never even discussed by the task force – an omission that Mills said will come to haunt the state.“If you try to put 2,500 or 3,000 megawatts in northern or eastern Maine – oh, my god, try to build the transmission!” said Mills. “It’s not just the towers, it’s the lines – that’s when I begin to think that the goal is a little farfetched.”

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Hannah Pingree on the Maine expedited wind law

Hannah Pingree - Director of Maine's Office of Innovation and the Future

"Once the committee passed the wind energy bill on to the full House and Senate, lawmakers there didn’t even debate it. They passed it unanimously and with no discussion. House Majority Leader Hannah Pingree, a Democrat from North Haven, says legislators probably didn’t know how many turbines would be constructed in Maine."

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