Heat Pump Installation | Portland, ME
Portland's housing ranges from West End Victorians without ductwork to Munjoy Hill triple-deckers where each unit needs its own system. Ductless mini-splits handle all of them. Portland sits in climate zone 6A with coldest-day lows around 0 to -5 degrees Fahrenheit. Modern cold-climate heat pumps handle those temperatures without backup heat in most Portland homes. We handle city permits and size every system to the specific heating load of your home or unit.
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No ductwork, historic plaster walls, high ceilings. Ductless mini-splits mount on walls or ceilings and connect to an outdoor unit through a small hole in the wall. For multi-zone systems we run line sets through closets and utility chases to reach every floor. No ductwork needed, no historic fabric disturbed.
Each unit gets its own outdoor unit and indoor heads sized to that unit's specific load. We coordinate with landlords and condo associations on outdoor unit placement, typically on the rear of the building or a side yard. We pull City of Portland electrical and mechanical permits for every installation.
1920s-1950s Capes and bungalows often have oil boilers and baseboard heat. Most Portland homeowners in these neighborhoods keep the boiler for the coldest nights as a backup and use the heat pump as primary heat the rest of the year, cutting fuel consumption 50-70% in the first season.
Portland averages coldest-day lows of 0°F to -5°F. Here's why modern equipment handles that.
Mitsubishi Hyper Heat units operate at full rated capacity down to -13°F and continue producing heat at -20°F. Portland winters rarely sustain temperatures below -10°F. For the coldest 1-2% of hours per year, most Portland homeowners keep an oil boiler as backup, which we evaluate at the free assessment.
A heat pump sized for Portland's climate zone 6A heating load, not just the square footage, operates efficiently all winter. We perform a Manual J load calculation for every Portland home to ensure the right number and size of indoor heads for complete coverage.
For older Portland homes with significant air leakage or missing insulation, we recommend air sealing and insulation first. A tighter home means a smaller, less expensive heat pump handles the load, and your winter savings are significantly larger.
"Horizon Homes is excellent. They have supported us for a number of projects across insulation and heat pumps and I can't recommend them enough. Cody is extremely thoughtful and answered questions over hours on the phone."
"No more cold floors, no more drafts in the living room. The difference after installing the heat pump and doing the air sealing was immediate and dramatic. Horizon handled the Efficiency Maine rebate. I didn't have to do a thing."
"Our oil consumption dropped from 1,100 gallons to about 300 gallons after the heat pump install and insulation. The heat pump handles everything down to -5 and we've only switched to oil a handful of times all winter."
Heat pumps work best in tight, well-insulated homes. Consider these services together:
