Looking for an HVAC contractor in Madison, NJ who knows the borough’s older houses? Stashluk Plumbing, Heating, Air Conditioning and Generators has repaired, replaced and maintained heating and cooling systems for Madison (07940) homeowners since 1948, working out of our shop at 31 Chatham Road in Summit. Call 908-277-6200 or request service online.
Heating and cooling for Madison’s older homes
Madison’s housing is old by New Jersey standards. Madison’s Amended 4th Round Housing Element (2026), citing 2023 American Community Survey data, reports that 51.8% of the borough’s housing structures were built before 1960. Houses from that era were usually built around a boiler and radiators, not ductwork, and many have since picked up a mix of add-ons: a furnace in a finished attic, a condenser out back, a ductless head in a sunroom. Our job is to make that mix work together, not to sell the same box to every house.
We see the full range here: large Victorian and Colonial Revival houses near the Bottle Hill Historic District and James Park, two-family and smaller homes on the older blocks off Main Street and Waverly Place, and the 1950s and 1960s neighborhoods such as Knollwood, Dellwood and Cross Gates, where original forced-air systems are now on their second or third furnace. Each brings different problems, from steam mains in a stone basement to an attic air handler that was never sized for a finished third floor.
Madison also runs its own electric utility, Madison Electric, which matters when you are weighing a heat pump (see rebates below). We confirm which electric and gas companies serve your address before we recommend equipment.
Boilers, steam heat and cast-iron radiators
Hot-water and steam boilers still heat a lot of Madison homes. We service both, including the older cast-iron radiators and baseboard they feed. Typical calls we handle:
- Steam systems: banging or hissing pipes, cold radiators, sticking air vents, low-water cutoff problems and pressure set too high.
- Hot-water (hydronic) systems: air in the lines, failed circulator pumps, leaking zone valves and expansion tanks.
- Radiators: bleeding, re-pitching, valve replacement, and advice on keeping cast iron when you remodel.
- Replacement: when a boiler is near the end of its life, we size the new one to the house’s actual heat loss rather than the old nameplate, and look at high-efficiency or combination boilers that also make hot water.
Details are on our boiler repair, boiler installation and boiler replacement in Madison pages.
Furnace repair and replacement
Forced-air homes in Madison range from post-war houses with their original duct layouts to newer builds and additions. When a furnace stops heating, short-cycles or trips its safety switches, we diagnose the cause, explain the options and fix it. We also check the flue, filter, blower and ductwork on the same visit, because in older houses the duct system is often the real cause of cold rooms.
If replacement makes more sense, see furnace installation in Madison, NJ. For repairs and tune-ups, see furnace repair and furnace maintenance.
Central air conditioning repair and replacement
We repair and replace central AC systems: warm air from the vents, frozen coils, refrigerant leaks, failed capacitors and condensers that won’t start. In older Madison homes the hard part is often the ducts, not the condenser. Attic runs added years after the house was built can be undersized or poorly sealed, so we check airflow before recommending a bigger unit. See AC repair in Madison, AC installation and AC maintenance.
Ductless mini-splits and heat pumps
A ductless mini-split is often the cleanest way to cool a boiler-heated house: a small outdoor unit, a refrigerant line through the wall and quiet wall or ceiling units in the rooms you use. No ducts, no lost closets. Modern cold-climate heat pumps can also carry much of the heating load, so many homeowners keep the boiler for the coldest days and let the heat pump handle spring and fall. We size each system room by room.
24/7 emergency heating & AC service
No heat on a January night, or no cooling in a July heat wave? We offer 24/7 emergency heating & AC service for Madison homes, and our phones are answered 24/7 at 908-277-6200.
Heat pump rebates for Madison homeowners
If your electricity comes from Madison Electric Utility: The Borough of Madison offers its electric customers rebates for replacing gas, oil or propane heating and hot water systems with heat pumps ($600 to $1,000), ductless mini-splits ($400) and heat pump water heaters ($750), up to $2,000 per customer. The borough recommends applying before the work begins.
On PSE&G: Instant rebates through participating contractors on qualifying gas furnaces ($540), gas boilers ($540 to $600), gas combination boilers ($780 to $1,050) and tankless water heaters ($300 to $450). Gas furnace and boiler rebates require replacing a non-condensing unit.
See current rebates or our 2026 NJ heat pump rebate guide. We will tell you which programs apply to your address.
Maintenance that suits the system you have
Boilers and furnaces get a fall check (burner, flue and safety controls, plus water level and vents on steam systems); air conditioners and heat pumps get a spring check (coils, refrigerant, drain and electrical). Ask about our inspection plans if you would rather not track the schedule yourself.
Plumbing and generators from the same team
Because we also do plumbing, one visit can cover a boiler and the water heater or piping next to it. For leaks, drains and water heaters, see our plumber in Madison, NJ page. We also install and maintain whole-home standby generators, which keep a boiler or furnace running when the power goes out.
Madison HVAC FAQ
Do you work on steam heat and cast-iron radiators in Madison?
Yes. Steam and hot-water boilers are a big part of our work in Madison, including radiators, vents, valves and controls. We repair what can be repaired and replace a boiler only when it makes sense.
Can I add central air to a house with radiators and no ducts?
Usually, yes. Ductless mini-splits need only a small wall opening per indoor unit. In some homes, a small-duct system or an attic air handler is an option too. We look at the house and lay out the options.
Does Madison Electric change which heat pump rebates I can get?
It can. Madison Electric customers use the borough’s own heat pump rebate program rather than JCP&L’s or PSE&G’s electric programs. Gas rebates depend on your gas company. We check your utilities before quoting.
Should I repair or replace an old boiler or furnace?
It depends on age, condition, safety and repair cost. We give you the facts on your specific system, including whether a repair is likely to last, and you decide.
Do you offer financing?
Yes. See financing for current options.
Contact Stashluk for HVAC service in Madison, NJ
Stashluk Plumbing, Heating, Air Conditioning and Generators
31 Chatham Road, Summit, NJ 07901 · Serving Madison and Morris County since 1948
Phone: 908-277-6200 (answered 24/7)
NJ HVAC-R license 250 · Master Plumber licenses 8464 and 10381 · HIC 13VH01438800
Call 908-277-6200 or request service online for heating, cooling or heat pump work in Madison, NJ.
