HVAC Service in Ancient Oaks, PA

What the work here actually looks like

Ancient Oaks was the Lehigh Valley’s first large tract of dense middle-class housing, opened in the 1960s, and it has kept growing since. That history shows up on every service call.

• Original 1960s and 70s ranches and split-levels, 24 percent of the housing, now on their second or third furnace. The ducts are original, drawn for a furnace and not for a cooling coil, and the return is usually the limiting factor for central air.
• 1990s and 2000s colonials, 56 percent of the housing, with the first-generation equipment from the build-out. A 2001 gas furnace and its condenser are due together, which puts full system replacement on the table more often than a repair.
• Gas furnace repairs. Igniters, inducers, flame sensors, control boards and, on a cleaning, the heat exchanger check that decides whether a 25-year-old furnace stays in service.
• Cleanings and tune-ups on gas equipment, with combustion set by analyzer, every time.

80 percent or 96 percent, and what changes when you go condensing

A standard 80 percent furnace vents up the chimney or a metal flue. A 95 or 96 percent condensing furnace vents in PVC through the sidewall or the roof and drips condensate that has to reach a drain through a neutralizer. That is the whole difference in the install, and it is where a cheap job goes wrong: vent terminations too close to a window or a meter, condensate run uphill to a laundry sink, no trap, no neutralizer, and a furnace that locks out on the first cold night.

Going condensing also raises the chimney question. Once the furnace leaves the masonry chimney, the water heater is usually alone on a flue sized for two appliances, and it may not draft. A liner belongs in the quote. Sizing comes from a load calculation against a winter design temperature near 8 °F and a summer design temperature near 91 °F, not from the nameplate of the unit coming out — 1960s furnaces were routinely two sizes too large for the house.

Central air on 1960s ducts

The original Ancient Oaks sections were built for heat only, and many still run window units. Adding a cooling coil to a duct system drawn for warm air raises static pressure and cuts airflow, so the far bedrooms never cool. The fix is measured, not guessed: static pressure on the running system, then a dedicated return, a resized trunk or a duct rebuild where the house needs it. Where the ducts cannot be fixed cheaply, ductless heads for the upstairs are the honest alternative.

On a gas house a heat pump is not automatically a saving, because gas is the cheapest heating fuel per BTU here. Where it earns its place is dual fuel: the heat pump replaces the air conditioner, carries the shoulder seasons, and hands over to the furnace in the coldest weeks. PPL rebates apply to the heat pump.

Common questions about HVAC work in Ancient Oaks

My furnace is from 1998 and works fine. Should I do anything?

Have it cleaned and the heat exchanger inspected every fall. A furnace that age can run for years, but a cracked exchanger is a carbon monoxide risk, and finding it on a cleaning is a lot better than finding it in January.

Is a 96 percent furnace worth the extra cost over an 80?

On gas at Lehigh Valley heating loads the fuel saving is real but not enormous. What tips it is the install: if the chimney needs a liner anyway, or the furnace room has a clean path for PVC and a drain, condensing is usually the right call. We price both.

Can I add central air to a house that never had it?

Usually yes. The question is whether the existing ducts can move the air. That gets measured before a quote, and the answer sometimes includes duct changes or a ductless head for the upstairs.

Who issues the permit?

Ancient Oaks is in Lower Macungie Township, 3400 Brookside Road, Macungie, (610) 966-4343. Pennsylvania moved to the 2021 IRC and 2021 IECC on 1 January 2026, so the work is judged against that code.

Book HVAC service in Ancient Oaks

Call Unity Heating & Air Conditioning at (267) 644-9516 to get on the schedule, or send details through the contact page. Repairs, cleanings, installations and replacements run out of Macungie. Emergency calls are taken at any hour.