Heat Pumps and A/C Service

A Better Way to Heat and Cool Your Home

The essential components of a zoned air conditioning and heating system are the outdoor unit, the indoor unit and the smart comfort controls. The system operates by delivering heat to and from an outdoor unit to one or more indoor units. The units are connected by pipes containing refrigerant, a substance that absorbs heat.

The outdoor unit is equipped with an INVERTER that enables it to quickly change the amount of power it uses and the amount of refrigerant it transfers to and from the indoor units. With the INVERTER, the outdoor unit only uses the precise amount of power needed to reach each zone’s preferred temperature.

Picture of a bedroom with a heat pump installed

Cooling Mode

In cooling mode, the refrigerant absorbs heat inside the home and produces colder air by transferring refrigerant from the indoor units to the outdoor unit, where the heat is expelled.

Heating Mode

In heating mode, the process is reversed and the refrigerant absorbs heat outside of the home and provides warmth by transferring the refrigerant from the outdoor unit to the indoor units. This method of heat transfer even works in freezing weather.

Take Full Control of Your Monthly Bills and Comfort

Room-by-room comfort control, a more efficient way to cool and heat your home or business.

Define Your Comfort Zones


It’s simple to assign each room to different “zones” so each room is always comfortable. Once you decide what temperature you’d like a specific zone to be, the system will quietly maintain that temperature using the least amount of energy needed.

Unmatched Quality,
Uncompromising Control

Mitsubishi Electric is the top selling brand of zoned air conditioning and heating systems. In addition to being quiet, intelligent and efficient, our systems provide extraordinary service life for a lower cost of ownership.

Great Solution for Maine’s Climate

Mitsubishi’s Hyper-heating INVERTER® (H2i®) technology will keep your home and business comfortable with 100% heating capacity at 5º F. H2i plus® takes hyper-heating technology to a new level, providing 100% heating capacity down to -5° F and guaranteed to provide heat down to -13° F outdoor ambient (without wind chill) temperature.

Hyper Heating

Watch How It Works

Tax Credits and Rebates

The Inflation Reduction Act of 2022 provides federal tax credits that are available through 2032 and provide up to $3,200 annually to lower the cost of energy efficient home upgrades by up to 30 percent.

The tax credits and incentives from the State of Maine and the IRS may change from year to year.


Efficiency Maine offers home energy loans to help income-eligible homeowners pay for energy upgrades, all without fees and with low interest rates.