Sierra Heating & Air ConditioningSierra Heating & Air ConditioningFurnace replacement in Baltimore generally costs $3,800–$8,500 installed, driven by unit size and efficiency. Maryland Comfort Heating & Air handles removal, install, and haul-away for row-homes and detached houses across Baltimore, from Canton to Roland Park.
| Furnace type / home size | Typical installed cost |
|---|---|
| 80% AFUE gas, small rowhome (40–60k BTU) | $3,800–$5,000 |
| 80% AFUE gas, mid-size home (60–80k BTU) | $4,500–$5,800 |
| 96% AFUE high-efficiency gas (60–80k BTU) | $5,500–$7,200 |
| 96% AFUE, large detached home (80–100k BTU) | $6,800–$8,500 |
| Electric furnace / air handler | $3,200–$5,500 |
| Added ductwork or gas-line modification | +$500–$2,500 |
Baltimore furnace replacement cost by type (installed, 2026 market range)
The two biggest factors in Baltimore furnace replacement cost are unit size (BTU output matched to the home's square footage) and efficiency rating (AFUE). An 80% AFUE furnace converts 80 cents of every fuel dollar to heat and costs the least upfront. A 96% AFUE furnace costs $1,500–$3,000 more but cuts gas bills over its lifespan. Oversizing a furnace wastes money and shortens the unit's life, so a proper heat-load calculation for the specific home is standard before quoting.
Labor is a distinct line item in Baltimore furnace replacement, typically $1,200–$2,500 depending on complexity. Older Baltimore rowhomes with tight basements or attic-mounted units take longer to access. A standard swap where the new furnace matches the existing footprint sits at the low end. Jobs requiring new flue venting, a condensate drain for high-efficiency units, or gas-line resizing push labor higher. A licensed crew handles the disconnect, removal, install, and startup test in one visit.
Baltimore City requires a mechanical permit for furnace replacement, and the permit fee is folded into the installed price on a full-service job. Permitted installs are inspected, which protects resale value and homeowners insurance claims. Skipping the permit risks fines and complications when selling the home. A reputable Baltimore HVAC contractor pulls the permit and schedules the inspection as part of the standard replacement, not as a surprise add-on.
A 90%+ AFUE furnace in Baltimore commonly qualifies for BGE and Maryland EmPOWER energy-efficiency rebates, which can offset several hundred dollars of the higher purchase price. Federal energy tax credits may also apply to qualifying high-efficiency units. These incentives change year to year, so confirmation happens at the on-site visit. Over a Baltimore winter, the fuel savings from a 96% AFUE unit narrow the gap against the cheaper 80% option.
Baltimore's rowhome stock in Canton, Federal Hill, Fells Point, and Locust Point often has furnaces in cramped basements or converted closets, which affects access and labor time. Hampden, Charles Village, and Bolton Hill homes frequently run older gas furnaces near end-of-life given the age of the housing. Larger detached homes in Roland Park and Guilford usually need higher-BTU units and sometimes zoned systems, landing at the top of the range. Baltimore City requires a mechanical permit and inspection for furnace replacement. Local gas service through BGE and cold Chesapeake-region winters make correct sizing important — an undersized unit runs constantly, an oversized one short-cycles. The minimum service charge is $150, and exact furnace pricing is confirmed free on-site.
A well-maintained gas furnace lasts 15–20 years in Baltimore. Units in older rowhomes running hard through Chesapeake winters often reach replacement age around year 15.
Most Baltimore rowhomes need a 40,000–60,000 BTU furnace, but proper sizing requires a heat-load calculation based on square footage, insulation, and window count — not a rule of thumb.
Repair usually makes sense under 12 years old; replacement is often the better value once a furnace passes 15 years or a repair exceeds roughly half the cost of a new unit.
Baltimore furnace repairs commonly run $150–$650 depending on the part, with a $150 minimum service charge; igniter, flame sensor, and blower motor jobs are the most frequent.
Replacing both together in Baltimore often lowers combined labor cost and ensures matched efficiency, especially when both units are 12+ years old.