AC Installation in Norristown, PA
A new air conditioner in Norristown will run from June through September 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.
Four months of real work, every year
Norristown asks for cooling from June through September, with summer afternoons averaging 85°F. That is the stretch your air conditioner has to handle, and it needs to be sized and installed to carry that heat without straining.
The county has also seen its share of hail and wind, 59 hail events and 351 damaging wind events over the past ten years, with hail up to 1.75 inches recorded. An outdoor unit sits exposed to that. If you are installing new, any central air conditioner built since 2023 has to meet a federal minimum of 13.4 SEER2.
- 4 months
- June through September, your air conditioner is on duty
- 85°F
- the average summer afternoon it cools against
- 59 hail events
- in ten years, and hail bends the fins on outdoor coils
- 13.4 SEER2
- the federal minimum any new unit must meet
NOAA nClimDiv, 1991–2020 normals
A higher-efficiency unit would save about $40 a year to run in Montgomery County compared with a new unit at the federal minimum.
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 business on file with the state and nothing more. Nobody tests the contractor's work, and the state does not check it again once the business is listed. Because Pennsylvania registers rather than licenses, and because cities and towns here cannot require their own HVAC license either, there is no state credential standing behind the crew doing your install.
The protection on this job comes from elsewhere. In most cities and counties, installing a new air conditioner needs a permit from the local building office, with an inspection once the work is done. That inspection is what checks the unit was actually put in correctly, since no state exam or license does that here.
Source: Pennsylvania General Assembly
- What size air conditioner does my house need?
- The right size comes from a load calculation, not the square footage of your house. A contractor looks at your insulation, your windows, how many floors you have, and where the sun hits the house before recommending a size. An oversized unit cools the air fast but shuts off before it pulls the humidity out, so the house feels damp even when the thermostat says it's satisfied. Undersized, and it runs the whole afternoon without catching up on a hot day. Get a contractor to run the calculation rather than matching the tonnage of whatever unit is out there now.
- Should I replace the whole system or just the outdoor unit?
- In most cases you want to replace the outdoor unit and the indoor coil together. The two are matched to work as a pair, and pairing a new outdoor unit with an old coil usually means you lose the efficiency gain you're paying for and can shorten the life of the new equipment. New central air conditioners have to meet a 13.4 SEER2 minimum now, which is a higher bar than what your existing coil was likely matched to. A contractor can look at the age and condition of your coil and ductwork and tell you whether either can stay.
- Do HVAC contractors in Norristown need a state license to work on my home?
- Pennsylvania doesn't license HVAC contractors the way some states do, but they do need to register with the state. That registration goes through the Bureau of Consumer Protection. Ask to see proof of registration before signing a contract, and it's worth confirming they carry insurance too since that's separate from the state registration requirement.