Heating and air conditioning service on the Main Line

SK is based on Montgomery Avenue in Bala Cynwyd, at the start of the Main Line. We repair, maintain and install heating and cooling systems in every Main Line town from Bala Cynwyd to Malvern, including the older stone houses many of them are known for.

Same-day repairs
Next-day installs
Family-owned in Bala Cynwyd for 15+ years

Schedule service

We’ll call you back to set a time.

Emergency? Call (610) 937-5357, 24/7.

4.9 From 300+ Google reviews
Family-ownedLocal and independent, in Bala Cynwyd for 15+ years
Fair pricesHonest service, with repair before replacement
Same dayRepairs, with next-day installs

What the Main Line is

The Main Line takes its name from the Pennsylvania Railroad’s Main Line. In the 1800s the railroad built stations west of Philadelphia and encouraged development around them, and by the early 1900s many wealthy Philadelphia families had moved out to country estates along the line. The traditional stations run Overbrook, Merion, Narberth, Wynnewood, Ardmore, Haverford and Bryn Mawr, and the region now reaches from the city limits out to Paoli, across parts of Montgomery, Delaware and Chester counties.

It isn’t one town. Lower Merion Township and Narberth Borough are in Montgomery County, Radnor and Haverford townships are in Delaware County, and Wayne reaches into Tredyffrin Township in Chester County. Each township sets its own permit rules and licenses its own contractors, which matters when a system is replaced.

What that means for heating and cooling

Many of the houses along the line were built before forced air was common, around a boiler in the basement and radiators in every room. Plenty still run that way, and a well-kept boiler can last decades, so the first question when one acts up is what failed, not what to buy. Adding air conditioning to those houses usually means an air handler in the attic rather than new ductwork through plaster. Larger homes often run several systems at once, one per floor or wing, and each one needs its own tune-up.

What Main Line homeowners should know

Steam or hot water: know which you have

A boiler with radiators runs either steam or hot water, and they behave differently. Steam radiators have an air vent on the side and tend to hiss and knock when something’s off; hot-water systems use a pump called a circulator and are quieter. When a steam boiler is replaced, the new one is sized to the radiators it feeds, not only to the size of the house, so the radiators heat evenly.

Air conditioning without opening the walls

Plaster walls and no ductwork are the usual starting point. Where there’s a usable attic, an air handler up there can cool the top floor through short runs. Some older houses already have a high-velocity system, with small flexible tubes run through closets and wall cavities, and we retrofit those with new equipment.

Historic districts and where the equipment goes

Lower Merion has local historic districts in Gladwyne, Mill Creek, Haverford Station, the Ardmore commercial center, the Merion Friends Meeting area and English Village in Wynnewood. There, the township’s historical review board looks at exterior changes visible from a public street when a building permit is needed, so a condenser placed out of sight usually avoids a review. National Register districts, such as North and South Wayne, place no restrictions on a private owner using private funds.

Twins and narrow lots

Not every Main Line house is an estate. Narberth has late-Victorian twins and singles on narrow lots, and Bryn Mawr has smaller houses along Lancaster Avenue built around 1900 to 1920. On a narrow lot, the condenser’s spot is chosen as much for the neighbor’s bedroom window as for the equipment, and a quieter unit can be worth it.

Moving off oil

If your house still has an oil tank, replacing the heating system is a good time to deal with it. In Lower Merion, an abandoned oil tank has to be removed by DEP-certified people under a township permit, and Haverford Township issues its own tank removal permit.

PECO rebates

PECO supplies gas and electricity across the Montgomery and Delaware County towns we serve. As of September 2026 it offers rebates to electric customers for ENERGY STAR heat pumps and central air, and a smaller rebate for heat pump or air conditioner maintenance. Gas rebate amounts change from October 1st, 2026, so check PECO’s current numbers before you buy.

Heating and air conditioning services on the Main Line

Heating repair

Most Main Line heating calls are about boilers: a cold radiator, banging pipes or no heat on one floor. A well-kept steam or hot-water system can run for decades, so we look for the part that failed, such as a circulator, a valve, an igniter or a vent, before anyone talks about replacing it. Furnaces and heat pumps in newer and renovated houses get the same approach.

Furnace repair
Boiler repair, hot water and steam
Radiator repair
Heat pump repair

See heating repair

AC repair

Central air here often means an air handler in the attic, where a clogged condensate drain can leak into the ceiling below in the middle of summer. We repair those systems and the condensers outside, and we tell you honestly when an old system is still worth fixing.

Central air repair
AC blowing warm air
Emergency AC repair

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Installation

A new system is sized for the house, not copied from the old unit. In a house with radiators that can mean a boiler matched to the radiators it feeds, and an attic air handler that cools the top floor without opening plaster. Replacing a system needs a township or borough permit, and in some historic districts, equipment you can see from the street gets a review.

AC installation and replacement
Furnace installation and replacement
Boiler replacement
Heat pump installation

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Maintenance

Larger Main Line houses often run two or three systems, one per floor or wing, and each needs its own tune-up: cooling in the spring and heating in the fall. Our $54 Seasonal Maintenance visit is the simplest way to keep a boiler, furnace or air conditioner out of trouble.

AC tune-ups
Furnace and boiler tune-ups
$54 Seasonal Maintenance
H.A.L.O. smart thermostat

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How a visit works

Call or send a request
Call (610) 937-5357 or use the form. For an emergency, call any time, day or night.
We call you back
Someone from our office calls you back to set a time that suits you.
We find what failed
We troubleshoot first and look for the part that failed before anyone talks about a new system.
You decide
We explain what we found and your options. Nothing gets done without your OK.

Prefer to talk now? Call (610) 937-5357

In our customers’ words

★★★★★
Saki was the best HVAC tech I have ever met. He was easy to schedule with, on time and very quick to diagnose our issue and offered a way to repair our system with an honest assessment. Our whole appointment was less than 30 min with a new part installed (he had it available in his truck). I appreciate that he is a small business and does not try to sell you on a whole new HVAC system like bigger companies have always done with our older system when there is a reasonable fix. I will 100% use SK again for my HVAC needs. If you are interested in maintaining vs replacing call SK.
Lily C., repair on an older system
★★★★★
Found SK Comfort through recommendations in a local Facebook group, and they definitely lived up to the reviews. Saki was easy to work with, showed up on time, and was very knowledgeable. He performed preventative maintenance on both of my HVAC systems, explained what he was doing along the way, and answered all of my questions without ever trying to upsell me. The pricing was very reasonable, and he worked efficiently while still being thorough. Overall, it was a great experience, and he’s earned a repeat customer. I’d definitely recommend SK Comfort if you’re looking for honest, reliable HVAC service.
Alex C., maintenance on two systems
★★★★★
Saki came out and was honestly soo refreshing to experience. He could have easily pushed us toward a brand-new system but instead focused on what actually made sense for our situation (duct problem not HVAC) and was sympathetic he could not do more. He explained everything clearly, was thorough and gave us some next step recommendations. You can absolutely tell he cares more about doing right by his customers than making a quick buck. Very evident how caring and honest he was. We’ll absolutely use him again and for all of our future hvac needs!
Kara D., a duct problem, not a new system

Main Line towns we serve

Each town has its own page: what the houses are like, the systems that heat and cool them and how far we are.

Why choose SK as your Main Line HVAC company?

Emergency HVAC repair, 24/7. No heat on a January night or no cooling in a heat wave? Call (610) 937-5357 and we answer around the clock.
Repair before replacement. We troubleshoot first, find what actually failed and give you the price before we start. When a new system makes more sense, you see both numbers.
Energy-efficient systems, sized for your house. When it’s time for new equipment, we size it for the house rather than the old unit, with 0% financing on approved credit.
Family-owned and independent. Local and family-owned for 15+ years, not private equity or a national chain.
A record you can check. Philadelphia Magazine’s Best HVAC Company 2024, and 4.9 stars from 300+ Google reviews.
About 5 to 50 minutes away. Our shop is on Montgomery Avenue in Bala Cynwyd, at the eastern end of the Main Line, from Merion Station a few minutes away to Wayne about 25 minutes out and Malvern about 45.

FAQs about HVAC services on the Main Line, PA

Which towns are on the Main Line?

The name comes from the Pennsylvania Railroad’s Main Line, and the traditional stations run Overbrook, Merion, Narberth, Wynnewood, Ardmore, Haverford and Bryn Mawr (“Old Maids Never Wed And Have Babies”). Bala Cynwyd, Villanova, Wayne and the towns out to Paoli and Malvern are usually counted too.

Which Main Line towns does SK serve?

We serve Bala Cynwyd, Merion Station, Narberth, Wynnewood, Ardmore, Haverford, Bryn Mawr, Gladwyne, Villanova, Wayne, Paoli and Malvern, plus Overbrook on the Philadelphia side. Each has its own page with drive times and local details. Farther out? Call and ask.

Is the Main Line in Montgomery County or Delaware County?

Both, and a little of Chester County. Lower Merion and Narberth are in Montgomery County, while Radnor and Haverford townships are in Delaware County, so a town like Bryn Mawr or Wayne can straddle county lines. It only matters for permits when a system is replaced.

Our Main Line house has radiators and no ductwork. Can we add central air?

Often, yes. Where there’s attic space, an air handler up there can cool the top floor through short duct runs into the ceilings. Cooling the floors below takes more planning, so we look at where ducts could run before suggesting anything.

Do I need a permit to replace a furnace, boiler or air conditioner on the Main Line?

Yes. Replacing a system needs a permit from your township or borough: Lower Merion, Radnor, Haverford Township or Narberth, or Tredyffrin or Upper Merion in parts of Wayne. Most of them also license the contractor, and Radnor asks the contractor to be at the inspection.

Will a historic district affect where a new condenser can go?

Sometimes. In Lower Merion’s local historic districts, such as Gladwyne, Mill Creek, Haverford Station and English Village in Wynnewood, the township’s historical review board looks at exterior changes visible from the street when a building permit is needed. Equipment out of public view isn’t reviewed, and a National Register listing on its own places no restrictions on a private owner.

Who supplies gas and electric on the Main Line?

PECO supplies both gas and electricity across the Montgomery and Delaware County towns we serve. If you smell gas, leave the house first, then call PECO from outside.

Are there rebates for a new heat pump or air conditioner?

As of September 2026, PECO offers rebates to its electric customers for ENERGY STAR heat pumps and central air conditioners. Its gas rebate amounts change from October 1st, 2026, so check PECO’s current numbers before you buy.

Need us today?

Call now for emergencies, or send a request and we’ll call you back.

Call (610) 937-5357 Schedule service