The independent heating and cooling company across Hampton Roads and coastal Virginia

Furnace Replacement in Fairfax, VA

Replacing a furnace is a day of work, and furnace replacement in Fairfax means we plan it before we start. We size the new unit to the actual heat loss of your home, check that the flue and combustion air meet code for the equipment going in, adapt the plenum and confirm the gas line is right for the input rating. Old unit out, new one set, wired, vented and test fired with the static pressure verified. Call us or send the quote form.

Call (888) 381-2953

A real person answers
Open 7 days
Written quote before work starts

Taking calls until 5:00 PM ET

We repair all major brandsCarrier Trane Lennox Goodman Rheem York American Standard Bryant

The symptoms that lead here in Fairfax

We keep paying for repairs and the parts are getting hard to find Aged furnace with discontinued components, replacement usually costs less over time
There is rust and water sitting under the furnace in the crawlspace Condensate or flue corrosion, common where the water table sits high
Upstairs bedrooms never get warm but the hallway is roasting Duct design and airflow distribution, addressed during a replacement

What a Furnace Replacement Actually Involves

We start with a load calculation instead of matching the old nameplate, because additions, new windows and added insulation change what the house needs. Then we shut down and disconnect the old furnace, pull it out, and prepare the space for the new cabinet. Ductwork connections, the flue or venting path, condensate routing and the gas connection all get addressed as part of the install. Crawlspace units in this region often sit above a high water table, so we look hard at platform condition and drainage before setting anything new.

What We Check and Install

Along with the furnace itself, we check the return and supply plenum fit, filter rack size, venting material and slope, combustion air, and the electrical whip and disconnect. Thermostat wiring gets verified and the control replaced if it cannot run the new equipment properly. We check static pressure across the system, because a new furnace pushing against undersized returns will short-cycle and run loud. Then we test the unit through a full heating cycle and confirm airflow and temperature rise at the registers before we pack up.

How We Decide Replacement Is the Right Call

We repair first when a repair makes sense. A single failed part on a furnace with years left is a heating repair, not a replacement. We lean toward replacement when the heat exchanger is cracked, when parts are no longer available, when the unit has had repeated failures across seasons, or when it can no longer heat the house on a cold night. We tell you which one you are looking at and why, and you decide. Nothing gets replaced because it is simply old.

Fairfax coverage

From Fairfax we also cover Vienna, Annandale, Burke, Centreville, Chantilly, Oakton, Falls Church and Springfield.

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Related furnace installation work in Fairfax

All furnace installation in Fairfax → · Furnace Replacement across the region →

What every visit includes

The quote comes first, in writing

Covering 147 cities across Washington DC, Delaware, Maryland and 5 more.

Phones answered by people

Open 7 days, 8:00 AM to 5:00 PM ET.

All major brands serviced

Carrier, Trane, Lennox, Goodman and more. We are not an authorized dealer for any of them.

Furnace Replacement in Fairfax — quick answers

How long does a furnace replacement take?

Most straightforward swaps are a one-day job. If venting, ductwork or the crawlspace platform needs work, or the new cabinet has a different footprint, it can run into a second day. We tell you which before we start.

Should I replace the AC at the same time?

Not always. If the furnace and the outdoor unit share age and the indoor coil sits in the same cabinet, doing both at once saves a second disruption. If your AC is sound, we leave it and match the new furnace to it.

How soon can you get to my house in Fairfax?

Call us and we will give you the first opening we have, and we prioritise no-cooling and no-heat calls during heat waves and cold snaps. Summer afternoons and the first hard freeze of the season are our busiest windows in Fairfax, so a morning call usually gets you seen sooner. If you have a gas smell, leave the house first, call 911 or the gas utility, then call us.

How it works

Step 1
Tell us the symptom
Call or fill in the quote form. We ask what changed, when it started, and what the thermostat reads against the actual room temperature. That short conversation tells us what parts to load on the truck.
Step 2
We diagnose on site
A technician checks the thermostat, the electrical side, airflow through the filter and coil, refrigerant behaviour and the outdoor unit. You get a plain explanation of what failed and why, before any work starts.
Step 3
Repair and verify
We make the repair, then run the system through a full cycle and measure temperatures at the supply and return. If something upstream caused the failure, we tell you so it does not repeat.

Call (888) 381-2953

A real person answers
Open 7 days
Written quote before work starts

Why homeowners call us

We know salt airCoastal homes lose condenser coils to salt corrosion years before inland systems do. We look for fin damage and pitted line sets on every visit, because a clean-looking unit can still be shedding capacity from the outside in.
Humidity is part of the jobHurricane-season air loads a system in ways a temperature reading will not show. If your house feels clammy at 74 degrees, we look at run times, airflow and drainage rather than just adding refrigerant and leaving.
Crawlspace realitiesHigh water tables mean wet ground under ductwork, rusted plenums and condensate lines with nowhere good to drain. We check what is happening under the floor, since that is often where comfort problems actually begin.
Straight answersWe tell you what failed, what it will take to fix, and whether a repair makes sense on an older system. No pressure to replace something that has honest years left in it, and no vague diagnosis.
All major brands, gas & electricIndependent service on Carrier, Trane, Lennox, Goodman, York and the rest.
Straight answersWhen a replacement beats a repair, we tell you, sometimes before we roll a truck.