Cost to Replace a Full HVAC System in Philadelphia

Based on actual job data from McCorry Comfort, January 2024–February 2026

Replacing an HVAC system is one of the largest single investments a homeowner makes in their property. In Philadelphia and the suburbs, where temperatures swing from the mid-90s in August to the single digits in January, the system you install needs to handle both extremes reliably for 15–20 years.

This guide covers what a full system replacement actually costs in 2026 — not industry-average ranges from a content farm, but actual numbers from our job history.

HVAC Replacement Cost by System Type

System Type	Typical Installed Cost	Notes
Gas furnace only (80% AFUE)	$2,500–$3,800	Standard efficiency, most common replacement
Gas furnace only (96% AFUE)	$3,500–$5,000	High-efficiency, condensing
Central AC only (14 SEER2)	$4,500–$6,500	Standard efficiency minimum
Central AC only (18+ SEER2)	$6,000–$9,000	High efficiency
Furnace + AC (matched system)	$7,000–$13,000	Most common full replacement
Air source heat pump (full system)	$8,000–$16,000	Cold-climate unit recommended for PA
Mini split (single zone)	$3,000–$5,500	No ductwork required
Mini split (multi-zone, 3-4 zones)	$9,000–$16,000	Full home ductless
Boiler replacement (residential)	$6,000–$12,000	Hot-water; steam adds cost

What's Included in a Full System Replacement

A full HVAC system replacement from McCorry Comfort includes:

• Removal and disposal of existing equipment
• New furnace or air handler installation
• New condenser unit installation (AC or heat pump)
• New evaporator coil (matched to condenser)
• Refrigerant line inspection and replacement if corroded
• Electrical connections and disconnect box
• Flue or venting (replaced if transitioning efficiency levels)
• Thermostat upgrade to match new system
• System startup, commissioning, and performance verification
• Permits (required by municipality)
• Equipment registration for full manufacturer warranty

What's NOT included in a standard replacement: ductwork modification (if needed, this is scoped separately), electrical panel upgrades (if needed, this requires an electrician), and structural work to create access.

What Drives Cost Up or Down

Factors that reduce cost

• Simple, accessible installation location (no attic/crawlspace complexity)
• Existing ductwork in good condition
• No electrical upgrades needed
• Standard efficiency equipment
• Straightforward system type (single-stage gas furnace + standard AC)

Factors that increase cost

• High-efficiency or variable-capacity equipment (significantly better performance, higher upfront)
• Ductwork problems that need addressing
• Unusual installation location (wall mount, roof mount, difficult attic)
• Electrical panel upgrade required for new equipment amperage
• Gas line capacity issues (especially for tankless water heaters or high-BTU furnaces)
• Zoning controls and smart thermostats
• Two-stage or variable-speed equipment (more comfortable, more efficient, costs more)

Efficiency Tiers — What the Numbers Mean

Gas Furnaces (AFUE)

• 80% AFUE: Standard efficiency — 80 cents of every dollar in gas becomes heat. Required minimum in most of Pennsylvania. Vents with traditional B-vent.
• 96% AFUE: High efficiency — condensing furnace. Vents with PVC. Costs $600–$1,200 more than 80%, saves $150–$300/year in gas. Payback: 4–8 years.

Air Conditioning (SEER2)

• 13–14 SEER2: Federal minimum efficiency. Lowest upfront, highest operating cost.
• 16–18 SEER2: Mid-range — better operating efficiency, moderate premium. Our most common residential install.
• 20+ SEER2: Premium efficiency. Significant upfront premium, meaningful savings in Philadelphia's humid summers. Variable-capacity units also provide better dehumidification.

Gas vs. Heat Pump: The 2026 Decision

This is the question we get most often on replacement projects right now. Here's the honest breakdown:

Gas Furnace + AC (Traditional)

• Lower upfront cost
• Gas heat is efficient and reliable in PA winters
• Well-understood technology, easy to service
• Fuel cost exposure — if gas prices rise significantly, operating cost goes up

Cold-Climate Heat Pump

• Higher upfront cost ($3,000–$6,000 premium over gas + AC)
• Operates efficiently down to -13°F (Mitsubishi Hyper-Heat)
• Eligible for federal tax credits (30%, up to $2,000)
• Lower operating cost at moderate temperatures (above 25°F — most PA winter days)
• Provides both heating and cooling from one system
• Backup heat strips engage in extreme cold — electric resistance, less efficient but rarely needed

For most Philadelphia-area homeowners replacing both furnace and AC at the same time, a cold-climate heat pump is worth a serious look. The federal incentives and efficiency gains at moderate temperatures make the economics increasingly favorable. We'll run specific numbers for your home on request.

Financing a Replacement

HVAC replacement is a significant expense. Financing options available through McCorry Comfort can spread the cost over 12–60 months. PECO customers may also qualify for on-bill financing programs. Ask us about current options when we come for the quote.

How to Get an Accurate Quote

We don't quote HVAC replacements over the phone. Getting you the right equipment at the right price requires:

• Measuring the home (Manual J load calculation)
• Assessing existing ductwork condition
• Checking electrical service capacity
• Evaluating existing gas line capacity
• Understanding what you want from the system — comfort, efficiency, specific features

The site visit takes about an hour. We'll come with options at multiple price points and let you decide what makes sense. No pressure, no manufactured urgency.

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Ready for a Replacement Quote?

Call us. We'll come out, assess your situation, and give you real numbers on your options.

McCorry Comfort
📞 (215) 399-2056
🌐 mccorrycomfort.com
Serving Philadelphia, Montgomery County, Bucks County, Delaware County, and surrounding suburbs