Late summer is the right time to make this call. Heating contractors book up fast once temperatures drop, and in 2026 the incentive landscape in New York shifted in ways that change the math homeowners were using even a year ago. At Bell Mechanical, we’ve been installing and servicing heating systems in Westchester and Putnam County homes since 1980, including older properties where the right system choice is rarely obvious from a quick Google search.
What follows is an honest, Westchester-specific comparison. We’ll use local electricity and gas rates, name the incentives that actually exist right now, and tell you when a gas furnace is still the smarter pick. National comparison articles get some of this wrong, and one piece of outdated information can cost you thousands.
What Each System Actually Does & Why It Matters Here
A gas furnace burns fuel to produce heat. Its efficiency is measured by AFUE (Annual Fuel Utilization Efficiency), the percentage of fuel that becomes usable heat. A high-efficiency furnace tops out around 98% AFUE, so it can never deliver more heat energy than the fuel it burns. A heat pump works differently: it moves heat that already exists in outdoor air into your home using electricity. Its efficiency is measured by COP (coefficient of performance), a ratio of heat output to electricity input. A quality cold-climate heat pump delivers a COP between 2.0 and 3.5 or higher depending on outdoor temperature, meaning it produces two to three and a half times more heat energy than the electricity it consumes.
That distinction matters more in some parts of Westchester than others. Putnam County, including the Mahopac area, falls in IECC Climate Zone 5A, a cold-humid classification that requires cold-climate rated equipment for dependable performance when temperatures drop below 20°F. Modern cold-climate models are rated to operate as low as -13°F, so winter performance isn’t the deal-breaker it was a decade ago. Westchester County sits in the less severe Zone 4A, where equipment selection is somewhat more straightforward.
One comparison point that often gets missed: a heat pump replaces both a furnace and a central air conditioner in a single system. When you’re comparing upfront costs, the fair comparison is heat pump versus a furnace-plus-AC combination, not furnace alone.
The 2026 Cost Comparison: Upfront, Monthly & Over Time
Installed cost for a ducted whole-home heat pump in Westchester typically runs $12,000 to $18,000 before incentives. A gas furnace alone runs $5,000 to $9,000 installed, but adding central air conditioning brings that combined total to roughly $9,000 to $17,000. The gap between the two paths is narrower than most homeowners expect once you account for both pieces of equipment.
On operating costs, the picture is honest but not as dramatic as national articles suggest. New York electricity rates average approximately $0.24 per kWh, among the highest in the Northeast. That high rate reduces the heat pump’s efficiency advantage compared to what you’d see modeled for the Midwest or the South. Using 2026 utility rate data, a cold-climate heat pump for combined heating and cooling runs an estimated $800 to $1,400 per year, compared to $1,200 to $2,200 per year for a gas furnace and central AC. The heat pump still tends to cost less to operate annually, but the margin is real, not dramatic. Over a 10-year horizon the savings can accumulate, but your upfront gap and current system’s age matter just as much.
New York Incentives in 2026: What Changed & What’s Still Available
The most important update for anyone comparing costs right now: the federal Section 25C energy efficiency tax credit, which provided up to $2,000 for qualifying heat pump installations, expired December 31, 2025 under the One Big Beautiful Bill Act and isn’t available for 2026 installations. Any comparison article listing it as a current benefit is working from outdated information. Factor it out of your math.
What is available, specifically to Westchester homeowners, is the NYS Clean Heat program administered through NYSERDA and Con Edison. Unlike a tax credit you claim the following April, these rebates are applied directly to your installation invoice at the point of sale through an enrolled Participating Contractor. For a standard single-family household that removes all fossil fuel heating equipment, the Con Edison Clean Heat incentive reaches up to $8,000. Retaining gas as backup qualifies for a smaller amount under a separate option.
There’s also a timing advantage to acting in 2026. Starting March 1, 2028, weatherization standards become a prerequisite for any Clean Heat incentive, meaning your home’s insulation and air sealing will need to meet program requirements before a rebate can be applied. Homeowners who install in 2026 or 2027 aren’t subject to that requirement. The NYS Clean Heat program has been reauthorized through 2030 with $5.36 billion in funding, so the program isn’t going anywhere. The simpler qualification window closes in early 2028.
Bell Mechanical is a Con Edison Participating Contractor, which means we apply the Clean Heat rebate directly on your installation invoice rather than requiring you to submit it separately.
When a Gas Furnace Still Makes Sense in Westchester
We’ve been doing this long enough to know a heat pump isn’t always the right answer. Here are three situations where staying with gas makes more financial sense:
- Your existing furnace is fewer than 10 years old and working well. Replacing functioning equipment before the end of its useful life rarely pencils out, regardless of long-term operating savings. A better path may be adding a heat pump at your next air conditioner replacement, partial electrification without the upfront cost of scrapping a working system.
- Your ductwork was sized for high-temperature furnace airflow. Approximately 68% of Westchester County homes were built before 1980, and many have duct systems designed around the higher supply air temperatures a furnace produces. A heat pump runs at lower supply temperatures, and ductwork that’s too restrictive can reduce efficiency or require modifications that add cost. A proper assessment will flag this before you commit.
- Full electrification isn’t financially or structurally practical right now. A dual-fuel system pairs a heat pump as the primary heating source with your existing gas furnace as cold-weather backup, typically switching over when outdoor temperatures drop to the point where the heat pump’s efficiency advantage diminishes. This captures most of the operating cost savings while preserving gas backup for the coldest nights, and it’s often a lower-cost entry point than a full system replacement.
What to Check Before You Decide: A Westchester Home Walkthrough
Before any equipment is selected, a Manual J load calculation should be performed. This engineering calculation determines how much heating and cooling capacity your home actually requires based on its size, insulation levels, window area, and local climate data. Equipment sized only for cooling load can undersize the heat pump’s heating capacity, which causes electric resistance backup heat strips to run frequently, and those strips are expensive to operate.
Two other variables worth checking early are your electrical panel and duct condition. A whole-home heat pump typically requires a dedicated 240V circuit drawing 30 to 60 amps depending on system size. Homes with 100-amp panels, common in pre-1960 Westchester construction, may need a panel upgrade before installation can proceed. That upgrade adds cost and should be included in any quote you receive so you’re comparing full project prices, not just equipment prices. On the duct side, leaky ducts reduce efficiency for any forced-air system, but a heat pump operating at lower supply temperatures is more sensitive to duct losses than a furnace running at 140°F. A duct leakage test during the assessment gives you a clear picture of whether that’s a factor in your home.
The right answer on heat pump versus gas furnace depends on your specific home, your current equipment age, your electrical panel, and your ductwork, not on a general comparison article. If you’re planning a heating system replacement before fall, reach out to Bell Mechanical at (845) 409-0490 to schedule an assessment while the calendar still has room.