Furnace Installation in Rockland, ME
A new furnace here will run from September through May every year. Tell us about the house, and a licensed contractor who covers Knox County will get in touch.
Tell us about the job
It takes about a minute.
Rockland furnaces work nine months a year
From September through May your furnace is what keeps the house livable. Winter nights average 16°F here, and on those nights the burner is cycling on and off for hours at a stretch. More than half the homes in this area heat with fuel oil, so whatever you're replacing has likely been working this hard for years already.
Knox County has seen 45 winter storms and 18 damaging wind events over the past ten years, and across Maine, 54 percent of households lost power for at least a day in 2024. A new furnace here needs to handle both things, the steady cold and the chance the power goes out in the middle of it. If you're looking at a gas furnace, federal rules require non-weatherized models built since November 2015 to reach 80 percent AFUE, so that floor is already set for you.
- 9 months
- September through May, your furnace is on duty
- 16°F
- the average winter night it heats against
- 80% AFUE
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
- What size furnace does my house need?
- It depends on your home's square footage, how well it holds heat, and how many walls and windows face the outside. Two houses the same size can need different sized furnaces if one has more insulation or newer windows. A contractor works this out with a load calculation rather than a rule of thumb, because a furnace that's too big cycles on and off too fast and one that's too small runs constantly and still leaves you cold. With winter lows here averaging 16°F, getting this number right matters more than it would somewhere milder.
- How do I know it's time to replace my furnace?
- Watch for uneven heat between rooms, a furnace that runs longer than it used to, or repairs that keep coming back. An older furnace is more likely to fail on the coldest night than a mild one, simply because it's working hardest then. Since homes here need heat from September through May, nine months of the year, a furnace that's struggling has a lot of hours ahead of it before spring. If yours is aging and giving you trouble, a contractor can tell you whether it's worth repairing again or replacing.
- Is a high-efficiency furnace worth it?
- It depends on how many months your furnace runs and how it's fueled where you live. Here, homes need heat nine months a year, so a furnace that turns more of its fuel into heat is working most of the year, not just a few cold weeks. More than half of homes in this area heat with fuel oil, and a high-efficiency furnace burns less of it for the same warmth. A contractor can walk through the options for your fuel type and tell you what makes sense for your house.