HVAC Service in Easton, PA

What 63 percent pre-1940 looks like block by block

The districts are old in different ways, and the constraint changes with each.

How the districts differ

• Downtown: brick and stone buildings with upper-floor apartments, deep plans and almost no exterior space, inside the historic Downtown District.
• College Hill: larger singles near Lafayette College on original radiator systems, with third floors finished long after the house was built.
• South Side: a separate borough until 1898, with its own dense pattern of twins and rowhomes on tight lots.
• West Ward: closely spaced rowhomes and twins where a full duct system was never part of the design.

The contrast with the shop’s end of the valley is sharp. The page on HVAC service in Macungie is mostly about 1980s houses on electric heat, and our Upper Macungie page is about subdivisions built since 2000. Easton is the far end of that range, and the work follows the building.

Cooling a house that never had ducts

Most of Easton predates forced air, so cooling here is a retrofit into a house with no chase, no plenum and nowhere to hide a trunk line. Three answers are honest, and the house picks one.

Three ways cooling gets into an Easton house

• Ductless mini splits: one outdoor unit, a head per zone, and a small wall penetration instead of a chase.
• High-velocity small duct: flexible tubing run through closets and wall cavities to small outlets, which suits a plaster house where trim and ceiling height matter.
• Conventional ductwork where there is somewhere to put it: a stacked closet, a back stair, a dropped section of basement ceiling.
• A room-by-room load calculation against 91 F summer and 8 F winter design conditions, so the air conditioning matches the house, not its square footage.

Ductless mini split installation in Easton

This is the most asked-for job in the city, and for good reason: most of Easton was finished before anyone ran a duct, and a ductless system adds cooling and real heat with one three-inch hole per room. Here is how I lay one out, because the layout is what separates a mini split that people love from one they curse.

• Heads sized per room from a load calculation, not from the 9,000 or 12,000 BTU menu. A 12,000 BTU head in a twelve-by-twelve College Hill bedroom short-cycles, never dehumidifies, and leaves the room cold and clammy at the same time. Small heads on small rooms is the whole trick.
• Single-zone where the yard allows it, multi-zone where it does not. One outdoor unit per head is more efficient and one failure does not take the whole house down; one outdoor unit feeding three or four heads is the answer in a South Side rear yard measured in feet.
• Line sets on brick. Run in a painted line-hide cover down the rear wall, sleeved and sealed at the penetration, with the condensate to a drain or, on an inside wall, a small pump. Nothing on the street-facing facade, which also keeps the Downtown historic district happy.
• The outdoor unit goes on a pad or a wall bracket a foot and a half off grade, clear of dripping eaves, so snow and defrost water have somewhere to go. In a four-foot gap between houses I measure the clearance to the neighbor’s wall so the unit is not breathing its own discharge air.
• Electrical. A dedicated 240-volt circuit and a disconnect at each outdoor unit. On a knob-and-tube-era service the panel check further down this page comes first.

Cold-climate models are rated down to about −13 °F and hold most of their capacity at Easton’s 8 °F design temperature, so a mini split here is the heating for a finished third floor or a West Ward twin, not only the summer cooling. Permits go through the Easton Bureau of Codes, and because the city is Met-Ed territory rather than PPL, it is Met-Ed’s efficiency program, not PPL’s, that decides whether a rebate applies. I check the current offer before quoting. More on the equipment itself is on the ductless mini split page.

Radiators, boilers and the flue

Steam and hot water systems still heat a large share of the city, and they can be serviced or replaced without touching the cooling question. Boiler work and ductless cooling are two separate projects sharing a house.

Because 58 percent of Easton already burns gas, the flue problem here is usually not an oil conversion. It shows up when an old atmospheric appliance comes off the masonry chimney and a sealed-combustion gas or propane system vents through a sidewall instead. Sitting inside UGI territory is also not the same as having a main on your block; the no-cost service line extension reaches 150 feet from an existing main.

Furnace installation in a city of boilers

About half the calls I get in Easton that start with the word furnace turn out to be boilers. If the house has radiators, it has a boiler, and the section above on radiators and flues is the one that applies. Where the house has ducts, usually a 1940s or later single or a rowhome converted off a gravity system decades ago, a furnace is the right equipment, and in a city that is 58 percent gas the new furnace is almost always a gas furnace.

The first decision is 80 percent or condensing. A 95 percent furnace vents through the sidewall in PVC and drips condensate that needs a drain and a neutralizer. In a rowhome the only wall that is yours is the back one, and the vent has to clear windows, the property line and the walkway by the distances the manufacturer and the code set. Where that does not work, an 80 percent furnace on the masonry chimney with a new liner is the honest alternative. One more thing worth knowing before you buy: federal rules move nearly all new gas furnaces to condensing efficiency at the end of 2028, so an 80 percent unit installed today is legal, but it is the last of its kind.

The 8.6 percent of the city still on oil has a third option when the furnace is due: stay on oil with new equipment, convert to gas if UGI has a main within its 150-foot no-cost extension, or move to a heat pump. Converting a radiator house to forced air is possible and I will price it if you want it, but in a plaster house it usually costs more than a new boiler plus ductless cooling and delivers less.

Furnace replacement: sizing an 1890 house instead of copying the old nameplate

Old Easton heating systems were oversized on purpose, first for coal, then by whoever converted them, and a replacement that copies the nameplate carries that mistake forward for another twenty years. I size a replacement from a room-by-room load calculation on your house: measured wall areas, the actual windows, the infiltration a brick-and-plaster building really has, against the 8 °F winter design temperature. On a pre-1940 house the answer is often considerably smaller than what is coming out, which means longer, quieter runs and even heat instead of blasts.

• The ducts get measured, not assumed. Gravity-era trunks are generous, which is good, but the return side is usually one grille in the hall. Static pressure is read on the running system and a return gets added where the numbers say so.
• Asbestos. Duct wrap, joint tape and boiler jackets from before about 1975 often contain it. That is a licensed abatement item in the quote, not a discovery on installation day.
• Access. Easton basements come with narrow stairs, low beams and Bilco doors, and the cabinet has to fit through them. It changes which equipment I pick.
• The chimney. When the new furnace vents in PVC, whatever is left on the chimney, usually the water heater, is alone on a flue built for two appliances. A liner or a power-vented water heater belongs in the price.

Mechanical permits are issued by the Easton Bureau of Codes on the second floor of City Hall, and Pennsylvania has judged installations against the 2021 IRC and 2021 IECC since 1 January 2026. On a full system replacement where cooling rides on the furnace, the coil and outdoor unit are replaced as a matched pair, because new equipment runs on R-454B or R-32 and will not mix with what is in a 2010 system.

Furnace repair, and when it is time to stop repairing

No-heat calls in Easton split by equipment. On gas furnaces it is usually a flame sensor coated in oxide, a hot surface igniter that has cracked, a pressure switch or inducer motor, a limit switch tripping because a filter or a return is starving airflow, or a control board. On the city’s many boilers it is a circulator pump, an aquastat, a waterlogged expansion tank with a weeping relief valve, an air-bound zone, or on the old standing-pilot units a thermocouple. On oil it is a nozzle, a cad cell, an ignition transformer or a plugged filter after a dirty delivery.

I diagnose before I quote, I carry the parts that actually fail, and I test for carbon monoxide on every call in a house with an atmospheric appliance, because a 1920s chimney and a 2020s furnace do not always agree. The line I use for repair against replacement is simple: a cracked heat exchanger is a replacement, full stop; a repair that costs more than a third of new equipment on a system past fifteen years is a conversation about replacement; and anything else gets fixed. No-heat calls are taken at any hour on (267) 644-9516.

Electrical service is the real limit

Knob-and-tube-era houses were wired for lighting, and many Easton services were sized long before anyone imagined a compressor outside. A heat pump with electric backup draws real current, and if the panel has nothing left after a range, dryer and water heater, a service upgrade becomes part of the project. We look at the panel during the estimate rather than at rough-in, because that finding changes the budget and the schedule.

Stone-foundation basements and newly conditioned third floors change how moisture moves through an old house, which is where indoor air quality work such as dehumidification earns its place.

Heat pump installation in Easton

Three in ten Easton households heat with electricity, much of it baseboard and wall resistance heat in converted apartments and third-floor flats. A heat pump moves two to three units of heat for every unit of electricity those systems burn, which is the largest single bill reduction available in the city, and in a house with no ducts it goes in as the ductless system described above.

On the gas majority the heat pump earns its place differently, as dual fuel: it replaces the air conditioner, carries the mild two-thirds of the heating season on electricity, and hands over to the gas furnace or boiler below a changeover point set for your house rather than a factory default. Either way the installation is sized at the 8 °F design temperature from a load calculation, with capacity read at low outdoor temperature rather than at the 47 °F rating point, and a deliberate decision about backup heat. The electrical service is checked before anything is ordered, for the reasons in the section above, and Met-Ed’s current heat pump incentives, not PPL’s, are the ones that apply at an Easton address.

Frequently asked questions about HVAC work in Easton

My house has radiators and no ducts. How do I get air conditioning?

Two routes cover nearly all of it. Ductless mini splits need one small wall penetration per zone and no chase at all. A high-velocity small-duct system runs flexible tubing through closets and wall cavities. Either way, the radiators stay where they are.

Why does my electrical panel matter before I buy a heat pump?

Because a heat pump and its backup heat draw real current, and many Easton houses still run small services laid in during the knob-and-tube era. If nothing is left in the panel after the range, dryer and water heater, a service upgrade becomes part of the job.

I am replacing an old gas boiler. Will the chimney need work?

Often, and it is worth pricing up front. A sealed-combustion unit vents through a sidewall and leaves the masonry chimney behind. Whatever is still attached to it, usually the water heater, is then on a flue sized for two appliances and may not draft properly.

Do I need a permit for HVAC work in Easton?

Mechanical work in the city is handled by the Easton Bureau of Codes on the second floor of City Hall. Pennsylvania adopted the 2021 IRC and 2021 IECC on January 1, 2026, so installations are judged against that code. Confirm current forms and fees before scheduling.

Book HVAC service in Easton

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.