Furnace Replacement Cost in the DMV

A new furnace in the DMV doesn't have a single sticker price — what you pay depends on the heating capacity your home needs, the efficiency you choose, and the venting and code work the install requires. The honest bottom line is that the only accurate number comes from a free in-home estimate, and rebates plus tax credits shape what you actually spend.

What drives furnace replacement cost?

Replacing a furnace is a code-regulated mechanical install, not a like-for-like part swap, so the price reflects your specific home. The real drivers across Maryland, D.C., and Virginia:

• Heating capacity. A furnace is rated in BTU output, and the correct size comes from a Manual J load calculation — an oversized furnace cycles hard and wastes fuel.
• Efficiency tier. A higher AFUE rating turns more of every fuel dollar into heat. A 96%+ condensing furnace costs more than an 80% model and burns less gas all winter.
• Venting and code. High-efficiency condensing furnaces vent through PVC and need a condensate drain, so switching up from an older metal-flue setup can mean new venting and a permit.
• Gas, electrical, and access. Gas-line sizing, a new flue liner, or a furnace buried in a tight attic or crawlspace all add labor.
• Removing the old furnace and any safety items — like a fresh carbon-monoxide check — that a responsible install includes.

Industry pricing for a furnace replacement varies widely with all of the above, so treat any online "average" as background, not a quote. Our cost breakdown explains the ranges in plain terms before you book an in-home estimate.

Should you replace the furnace — or switch to a heat pump?

Furnace replacement is the right call when an aging or unsafe unit is past the point of another repair — generally around 15–20+ years, after a cracked heat exchanger, or when repair costs start rivaling a new system. Use our repair-or-replace guide to weigh age, safety, and cost. It's also the moment to ask a bigger question: a furnace vs. heat pump comparison may show that an all-electric heat pump — or a dual-fuel pairing — fits your home and unlocks larger rebates, which can change the budget entirely (see heat pump cost in the DMV).

Where furnace projects go sideways

The avoidable problems that cost homeowners more than the furnace itself:

• Oversizing off the old nameplate instead of a load calc — noisy, short-cycling, less efficient.
• Cutting corners on venting on a high-efficiency unit, which is a safety and warranty risk.
• Skipping the gas and CO safety checks a proper install requires.
• Choosing on price alone and missing the efficiency tier that qualifies for rebates.

How rebates and tax credits factor in

A qualifying high-efficiency gas furnace can earn the federal Energy Efficient Home Improvement Credit (25C) — up to several hundred dollars — while the larger 25C credit (up to $2,000) is reserved for a qualifying heat pump, which is part of why switching is worth pricing. DMV utility programs — EmPOWER Maryland, the DCSEU, and Dominion Energy — also offer incentives on efficient heating equipment. Caps and eligibility change year to year, so confirm current amounts; our rebates and tax-credit guide shows how they combine.

How Logan prices a furnace replacement

Our union-trained (UA Local 602) techs size your furnace with a real Manual J calculation, vent it to code, run the safety checks, and put honest numbers — rebates included — in writing first. See what's covered on our heating & furnace services page. When you're ready, request a free in-home estimate and we'll show you every rebate and tax-credit option for your home.