Furnace Installation in Stamford, CT
A new furnace here will run from October through May every year. Tell us about the house, and a licensed contractor who covers Stamford will get in touch.
Tell us about the job
It takes about a minute.
Eight months of heat, most nights near freezing
Stamford needs a working furnace from October through May. That's eight months of the year, and winter nights average 22°F from December through February. A furnace here does not get much of a break.
More than a third of homes in the area heat with fuel oil, so an oil furnace replacement is a common job, not an unusual one. Whatever fuel it runs on, a new non-weatherized gas furnace has to meet the federal minimum of 80.0 percent AFUE. Connecticut also sees real power outages. In 2024, 20% of households in the state went at least 24 hours without power, worth keeping in mind if you are weighing how your heat runs when the grid does not.
- 8 months
- October through May, your furnace is on duty
- 22°F
- the average winter night it heats against
- 80% AFUE
- the federal minimum any new unit must meet
NOAA 1991–2020 monthly normals
Connecticut requires HVAC contractors to hold a state license.
The license is issued to the contractor, not to a single job. It covers this installation the same way it covers any other work that contractor takes on. Connecticut's Department of Consumer Protection is the body that tested and records that contractor, and that record is what stands behind the work on your furnace.
In most cities and counties, a furnace installation also needs a permit from the local building office, with an inspection once the work is done. That inspection checks the installation itself, including the gas connection, which is the part of this job where a mistake is dangerous. The license accounts for the contractor. The permit and inspection account for the work done in your home.
Sources: Connecticut General Assembly · Connecticut Department of Consumer Protection
- What size furnace does my house need?
- The right size comes from a load calculation, not a chart based on square footage. A contractor measures your walls, windows, ceiling height and insulation, then figures how much heat escapes on the coldest night to size the furnace to match. Too big and it short cycles, wearing out parts faster and leaving rooms uneven. Too small and it runs constantly through the winter and still can't keep up when it's 22 degrees outside. With eight months of heating season here, getting this number right matters more than it would somewhere milder.
- How do I know it's time to replace my furnace?
- Watch for heat that's uneven room to room, a furnace that cycles on and off more than it used to, or bills that climb while it works harder for the same warmth. Age matters too. An older furnace has likely lost efficiency even if it hasn't broken down yet. If you're calling a repair tech more than once a season, or the repair quote is creeping up toward what a new unit would cost, that's usually the sign. Since homes here need heat from October through May, a furnace that's struggling has almost no season to rest and recover.
- Is a high-efficiency furnace worth it?
- It depends on how long you plan to stay in the house and what you're replacing. Every non-weatherized gas furnace built since November 2015 has to hit at least 80 percent AFUE, so even a standard model today wastes less fuel than an old one might. A high-efficiency furnace pulls more heat out of the same gas, which matters more in a place where the furnace runs eight months a year. About a third of homes here heat with fuel oil rather than gas, so the efficiency math looks different depending on which fuel you're using. A contractor can walk through the actual numbers for your furnace and your house.