Furnace Installation in North Plainfield, NJ
A new furnace here will run from October through May every year. Tell us about the house, and a licensed contractor who covers Somerset County will get in touch.
Tell us about the job
It takes about a minute.
Eight months of heat, and winter nights near 24 degrees
Furnaces in North Plainfield work from October through May. That is eight months of the year, longer than most of the country asks of a furnace, and winter nights average 24°F. A new furnace here needs to hold up to that stretch, not just get through a few cold weeks.
Most homes in the area heat with gas, and any non-weatherized gas furnace built since November 2015 has to reach at least 80 percent AFUE by federal rule. Storms are part of the picture too. The area has logged 21 winter storms and 153 damaging wind events over the past ten years, and 11 percent of New Jersey households went at least 24 hours without power in 2024. A furnace installed here should be sized and set up with that in mind.
- 8 months
- October through May, your furnace is on duty
- 24°F
- the average winter night it heats against
- 79%
- of homes here heat with gas, so most furnaces here burn gas
- 80% AFUE
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
A high-efficiency gas furnace would save about $140 a year to run in Somerset County compared with a gas furnace.
Estimates for a typical Somerset County home, from EIA household energy data, New Jersey fuel prices and NOAA climate normals. Your home will differ.
New Jersey requires HVAC contractors to hold a state license.
The state board tested this contractor before handing out the license, and it keeps the record on file. That license belongs to the contractor, not the job, so the same one covers this furnace installation and whatever other work they take on. New Jersey does not let Somerset County or any town add its own HVAC licensing on top. The state board is the one record that applies here no matter the address.
The license speaks to who the contractor is. It does not inspect this particular furnace once it is in. In most cities and counties, a furnace replacement needs a permit from the local building office and an inspection when the work is done, and that is where the finished job gets checked. In Somerset County, close to 8 in 10 homes heat with gas.
Sources: New Jersey Legislature · New Jersey Division of Consumer Affairs
- What size furnace does my house need?
- The right size depends on your square footage, your insulation, your windows, and your ceiling height, so a contractor needs to run a load calculation rather than go by a rule of thumb. A furnace that's too big cycles on and off fast and never runs long enough to heat evenly. One that's too small runs constantly and still can't keep up on a night that hits 24 degrees. With winter nights here averaging in the mid-20s from December through February, getting the size right matters more than in a milder climate, so ask the contractor to walk you through the calculation rather than just quote a number.
- How do I know it's time to replace my furnace?
- Watch for rooms that won't heat evenly, a furnace that cycles more than it used to, or repair calls that are getting more frequent. Age matters too. Most furnaces are built to last a couple decades, and one that's getting close to that is worth having inspected before winter rather than after it fails. Homes here need heat from October through May, eight months of the year, so a furnace that quits partway through that stretch isn't something you can wait out. If yours is old and struggling, get it looked at before the cold sets in rather than after it stops.
- Is a high-efficiency furnace worth it?
- It depends on how many months your furnace runs and what you're replacing. Every new non-weatherized gas furnace sold since November 2015 has to hit at least 80 percent AFUE, so the question is really whether to go higher than that. With heat needed here eight months out of the year, a furnace that's more efficient has a lot more months to make that efficiency count than it would somewhere with a short winter. A contractor can walk you through the actual models and what each one costs installed, since that's specific to the house and the equipment.