The Future of Heating and Cooling Is Here

The outside units of two air source heat pumps installed by ReVision Energy. Air source heat pumps efficiently heat homes even down to -17 degrees.Let’s leave dirty fossil fuel heating in the past and look to a clean and renewable heating future with ductless Air Source Heat Pumps (ASHPs). Why choose heat pumps over traditional heating and cooling solutions? Because with heat pumps you can “lock-in” a rate that is equivalent to paying around $1/gallon of heating oil.

Heat pumps are preferable as a heating and cooling source not just because they are a responsible way to do heating and cooling, modern heat pumps are also fundamentally more efficient than older technologies like baseboard heating and air conditioning – making them the most cost-effective form of heating and cooling, all in one system.

How Do Heat Pumps Work?

An air source heat pump, hung inside a ReVision Energy customer's home in Maine.Heat pumps extract heat from the outside air using a reverse refrigeration cycle, hence the “air source.” They take the heat and move it into your space, rather than directly heating the indoor air. By moving heat, instead of making it, the heat pump can heat or cool a space up to 2-3x more efficiently than other electric heating/cooling equipment.

Heat pumps were once mainly seen in the milder regions of the United States, but thanks to Mitsubishi Electric’s dramatic improvements in the low-temperature performance of their extensive line of heat pump systems, they are being rapidly adopted in the Northeast. The latest generation of heat pumps can provide heating to temps as low as -17 Fahrenheit, making them quite capable of handling most of the coldest days and nights in New England.

Heat Pumps + Solar = Ultimate Flexibility and Savings

Heat Pumps convert outside air into heat or cooling using electricity, which ranges in price in our region from 14-17 cents per kilowatt-hour, depending on your utility. That’s the equivalent of paying roughly $1.50/gallon of heating oil – an improvement versus the status quo for sure – but when combining that heat pump with the locked-in lower rates of solar electricity, that price comes down to 9 cents per kilowatt-hour or roughly $1/gallon of heating oil. That’s an idea we can all warm up to!

Fuel Source Cost per Unit Cost per Million BTUs Cost to Heat Typical Home
Resistive Electric Powered by Grid $0.14 / kWh $44 $4,489
Heating Oil (2010 prices) $3.70 / gallon $41 $3,938
Heating Oil (2016 prices) $2.70 / gallon $30 $2,790
Propane $2.50 / gallon $35 $3,404
Natural Gas $2.00 / therm $26 $2,587
Resistive Electric Powered by Solar $0.09 / kWh $26 $2,418
Heat Pump Powered by Grid $0.14 / kWh $18 $1,706
Heat Pump Powered by Solar $0.09 / kWh $11 $1,023

Based on fuel data and pricing from Maine Energy Office. Assumes typical oil boiler operating at 65% efficiency, propane, and natural gas at 85% efficiency, resistive electric at 95% efficiency and heat pump at 250% efficiency (COP of 2.5). Solar PV kilowatt-hour cost of 9 cents per kilowatt-hour over 25-year timeframe based on typical pricing economics of a 4kw + system. Economics are roughly the same in New Hampshire or Massachusetts, subject to the local cost of oil, propane, and electricity.

A home powered by solar and heated by an air source heat pump, both installed by ReVision EnergyA grid-tied solar electric array is an ideal partner for a heat pump. State law allows you to bank excess solar power in the summertime to earn you bill credits, which can be cashed in for electricity in the wintertime to run your heat pumps. Think of it like a woodshed that stacks itself – you’re harnessing clean power from the sun and storing it for later, and in the meantime helping reduce peak demand on the grid by producing excess power in the summertime.

Heat Pumps are Great for Supplemental Heat for New and Existing Homes

The most popular application for heat pumps are in supplemental heating applications, similar to the way wood or pellet stoves are – we review house floor configurations and recommendation installation of one or more heat pumps in common areas of the home that area to a comfortable temperature. In this situation, you would keep an existing oil or propane equipment for backup, but for most of the heating season rely on the heat pump to do the heavy lifting.

The outdoor unit to an air source heat pump.The simplicity and reliability of heat pumps also make them a great choice for new homes, where the savings garnered by installing heat pumps instead of a traditional heating system can be used to install solar electricity for the home. By heating and cooling with electricity, and then using solar panels to generate electricity, you end up with a home that fully meets its own energy needs that costs less to operate than a conventional home.


State incentives are periodically offered for air source heat pumps, currently:

Why Choose ReVision Energy As Your Installer?

ReVision Energy is an Elite Diamond Contractor for Mitsubishi ElectricWe’ve been installing and servicing Mitsubishi Electric Air Source Heat Pumps since 2011 when advances in solar energy and heating technology made it clear that banking solar electric generation in the summertime and using stored solar energy via heat pumps in the winter was the best approach to solar-powered heating.

Since then we’ve installed hundreds of heat pumps across Maine, New Hampshire, and Massachusetts, earning Mitsubishi Electric’s Elite Diamond Contractor designation that is awarded to installers with the highest level of training and experience.

We know Mitsubishi Electric’s products inside and out and we are certain of their ability to reliably provide comfort through all of the highs and lows that New England throws their way. Their heat pumps come with an industry-leading 12-year parts and compressor warranty on single-family, residential installations, and a 5-year parts and 7-year compressor warranty on multi-family and commercial installations.

Between Mitsubishi Electric’s high-performance technology and our technical excellence and legendary customer service, ReVision Energy offers the best solar-powered heating and cooling solutions in the region.