Furnace Installation in Norristown, PA
A new furnace here will run from October through April every year. Tell us about the house, and a licensed contractor who covers Montgomery County will get in touch.
Tell us about the job
It takes about a minute.
Seven months of heat, and nights near freezing
Norristown needs a furnace from October through April. That is seven months of the year, with winter nights averaging 25°F. A new furnace has to hold up to that whole stretch, not just the coldest week in it.
51.8% of homes here heat with gas, and any non-weatherized gas furnace built since November 2015 has to reach at least 80 percent AFUE by federal rule. Power is worth planning around too. Pennsylvania saw 15 percent of households lose power for 24 hours or more in 2024, and the area has had 35 winter storms and 351 damaging wind events over the past ten years. A furnace that comes back on by itself once power is restored is one less thing to deal with when a storm knocks the lights out.
- 7 months
- October through April, your furnace is on duty
- 25°F
- the average winter night it heats against
- 52%
- 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 $120 a year to run in Montgomery County compared with a gas furnace.
Estimates for a typical Montgomery County home, from EIA household energy data, Pennsylvania fuel prices and NOAA climate normals. Your home will differ.
Pennsylvania requires contractors to register with the state.
That registration puts the contractor's business on file with the state and nothing more. There is no trade exam behind it and no license number tied to tested skill, just a record that the business exists. Montgomery County cannot layer its own HVAC license on top of that, since Pennsylvania does not let cities and towns do that.
What stands between you and bad work on this job is the permit. A furnace installation needs a permit from the local building office, and an inspector checks the work when it is done, including the gas connection, which is the part that matters most if it is wrong. In Montgomery County, where 51.8 percent of homes heat with gas, that inspection is the real backstop here, not a license.
Source: Pennsylvania General Assembly
- What size furnace does my house need?
- It depends on your home's square footage, ceiling height, insulation, window count, and layout, so there's no single number that works for every house. A contractor works this out with a load calculation, not a rule of thumb based on square footage alone. Since winter nights here average 25°F, getting the size right matters more than in a mild climate. Too big and it short cycles, wearing out parts faster. Too small and it runs constantly through the cold months and still can't keep up.
- How do I know it's time to replace my furnace?
- Age is one thing to check, along with how the furnace has been running. Homes here need heat seven months of the year, October through April, so a furnace gets worked hard over its life. If yours is cycling more than it used to, needs a repair every season, or leaves rooms colder than others, those are signs it's wearing out. A furnace that can't hold up through a stretch of 25°F nights is one you don't want to gamble on.
- Is a high-efficiency furnace worth it?
- It depends on how long you plan to stay in the house and how much you run the furnace. With heat needed seven months a year here, a high-efficiency model has more months to make up the difference in fuel use than it would in a place with a short winter. Every furnace made since November 2015 has to hit at least 80 percent AFUE, so the real choice is between that baseline and a high-efficiency unit rated higher. A contractor can walk through the numbers for your specific home and usage.