A close-up of an ice-glazed tree branch covered in snow and hanging icicles, photographed during an active winter storm with a snow-covered house in the background.

Furnace Installation in New Haven, CT

A new furnace here will run from October through May every year. Tell us about the house, and a licensed contractor who covers New Haven will get in touch.

Tell us about the job

It takes about a minute.

Step 1 of 3: Equipment
A gas furnace and sheet-metal air handler unit installed in an unfinished concrete basement.

New Haven asks a lot of a furnace

Homes here need heat from October through May. That is eight months of the year the burner is doing its job, on nights that average 25°F through the coldest stretch of winter. A new furnace has to hold up to that stretch every year, not just get through one winter.

Most homes in New Haven heat with gas, and any new non-weatherized gas furnace has to reach at least 80 percent AFUE under the federal minimum. That is the floor, not a target, so it is worth knowing where the unit going into your home actually lands.

8 months
October through May, your furnace is on duty
25°F
the average winter night it heats against
80% AFUE
the federal minimum any new unit must meet
Isometric grayscale illustration of a cutaway single-story house showing interior rooms with furniture, plus an exterior furnace unit with a tall flue pipe and ducting running into the attic space.
Your furnace works hardest from November through March.

NOAA 1991–2020 monthly normals

An unfinished concrete basement containing a metal HVAC air handler, exposed wooden ceiling joists with sheet-metal ducts, a hanging bare bulb, copper pipes, and stacked cardboard boxes.

A high-efficiency gas furnace would save about $130 a year to run in New Haven compared with a gas furnace.

  • A high-efficiency gas furnace$610 a year
  • A gas furnace$740 a year

Estimates for a typical New Haven home, from EIA household energy data, Connecticut fuel prices and NOAA climate normals. Your home will differ.

Connecticut requires HVAC contractors to hold a state license.

Connecticut's Department of Consumer Protection tests contractors before it licenses them, and the license belongs to the contractor, not to any one job. That means the contractor standing in your home has already answered to the state once, before this furnace was ever on the schedule.

The license does not cover the installation itself. In most cities and counties, putting in a new furnace needs a permit from the local building office and an inspection once the work is done, and that is likely true in New Haven as well. Almost half of New Haven homes heat with gas, so a gas furnace installation is common work here, not an unusual one.

Sources: Connecticut General Assembly · Connecticut Department of Consumer Protection

What size furnace does my house need?
The right size depends on your home's square footage, insulation, window count and layout, not just a rule of thumb. A furnace that's too big will short cycle and wear out faster. One that's too small will run constantly and still leave rooms cold on a 25°F night. A contractor works this out with a load calculation that looks at your actual house, not a guess based on square footage alone.
How do I know it's time to replace my furnace?
If your furnace is old enough that repairs are getting frequent, or a repair would cost a large share of what a new furnace costs, replacement usually makes more sense. Watch for uneven heat between rooms, a furnace that runs longer than it used to, or a rise in your gas bill without a reason. Since homes here need heat from October through May, a furnace that's struggling has to work hard for most of the year. A contractor can tell you whether what you're seeing is a fixable problem or a sign the unit is done.
Is a high-efficiency furnace worth it?
It depends on how long you plan to stay in the house and what your current furnace costs to run. Furnaces built since November 2015 already have to hit at least 80 percent AFUE, so the real choice is between that baseline and a furnace built to go beyond it. With heat needed here 8 months a year, the difference shows up in every winter bill, not just the coldest ones. A contractor can walk through the numbers for your specific furnace and home.