HVAC Installation in Allentown, PA
A new system here will heat from October through May and cool from June through August every year. Tell us about the house, and a licensed contractor who covers Lehigh County will get in touch.
Tell us about the job
It takes about a minute.
Eleven months of work a year for your system
Lehigh County only gives your heating and cooling system one real month off. Furnaces and heat pumps run October through May, eight months, with winter nights averaging 22°F. Then the air conditioner takes over for June through August, working against afternoons that average 83°F. Whatever you install has to handle both ends of that range and hold up doing it.
A lot of homes here heat with electricity, so the power itself matters as much as the equipment. Pennsylvania saw 15% of households lose power for 24 hours or more in 2024, and this area has logged 22 winter storms and 211 damaging wind events over the past ten years. A new system installed here should be sized and set up with that in mind, not just the temperature swings but the outages that come with them.
- 8 months
- October through May, your system heats
- 3 months
- June through August, it cools
- 22°F
- the average winter night it heats against
- 83°F
- the average summer afternoon it cools against
NOAA nClimDiv, 1991–2020 normals
Pennsylvania requires contractors to register with the state.
That registration puts the business on file with the state. It doesn't mean anyone tested the contractor's work or the people doing it, because Pennsylvania doesn't run a trade exam for this kind of job. Cities and towns here can't set up their own HVAC license either, so the registration is the same wherever in the state you are.
For a job like this, the protection comes from the permit process most local building offices require. In most cities and counties, installing a new furnace, air conditioner or heat pump needs a permit, and the work gets inspected once it's done. That inspection is what checks the gas connections, the wiring, the venting, the parts of the job that can hurt someone if they're done wrong.
Source: Pennsylvania General Assembly
- When should I replace my HVAC system?
- Replace it when repairs keep adding up or when the system can't keep the house comfortable anymore. An aging furnace or air conditioner works harder to do the same job, and it's the one most likely to fail on the coldest night. Rising energy bills with no other explanation are another sign the equipment is losing efficiency. If a contractor is quoting a major repair, ask what a new system would run instead, since homes here need heat from October through May and a furnace can't be down for long in that stretch.
- Should I replace my furnace and air conditioner at the same time?
- If both are old, yes, it usually makes sense to replace them together. A furnace and air conditioner installed at different times often don't match well, and mismatched equipment can run less efficiently or wear out sooner than it should. Replacing them together also means one installation instead of two, with the ductwork and airflow set up for both pieces at once. If one unit is much newer than the other, a contractor can tell you whether it's worth keeping for now.
- What happens during an HVAC installation?
- A contractor removes the old furnace, air conditioner, or both, and sets the new equipment in place, connecting it to the ductwork, gas line or electrical circuit, refrigerant lines, and the venting it needs to run. They'll check that the ducts are sized right for the new equipment, since a furnace or air conditioner moving too much or too little air for the ductwork won't heat or cool evenly. Once it's connected, they test the system, check refrigerant charge and airflow, and set the thermostat. A contractor can walk through the specific steps for your home and equipment before the work starts.