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Furnace Replacement in Henderson, CO
When the furnace quits on a January night in Henderson, you're not just uncomfortable — you're a long way from the nearest supply house. This guide covers 2026 replacement costs, the repair-vs-replace call, and what to expect from the licensed installers we connect you with.
Updated October 2026 · Written from first-hand field experience in the north Denver metro · Prices verified against 2026 Denver-metro quotes
Get a straight answer on your furnace
Talk to a licensed local installer in Henderson. Free second opinions on replacement quotes — no pressure, no obligation.
Typical response time: under 15 minutes, 7am–7pm daily.
Is it the furnace, or something simpler?
Before you price a replacement, rule out the cheap fixes. In our experience these cause most "furnace trouble" calls in Henderson:
- Dead thermostat batteries or a tripped breaker — check these first, seriously.
- Clogged filter choking airflow — a $15 filter fixes the "runs but barely heats" complaint more often than people expect.
- Failed ignitor or flame sensor — a $200–$400 repair, not a $5,000 replacement.
Call now, don't wait: smell of gas, carbon monoxide alarm, or water pooling under the furnace. Those are same-day problems.
Repair or replace? The honest fork
Repair it
Furnace is under 12 years old, the repair is under ~$800, and your heating bills haven't crept up. A good tech gets you 3–5 more years.
Replace it
15+ years old, second major repair in two years, cracked heat exchanger, or rooms that never get warm. At that point you're paying for heat you don't get.
Rule of thumb we stand behind: if the repair costs more than about a third of a new system and the furnace is past 12 years, replacement usually wins on math alone.
What furnace replacement costs in Henderson (2026)
Henderson's rural properties and larger lots mean longer duct runs and older equipment in many homes. A proper load calculation matters more here than in a tight subdivision — square footage alone doesn't size the system.
What moves you up or down inside that range:
- Efficiency rating — 80% AFUE vs 96%+ AFUE is the biggest price jump — and the biggest gas-bill difference.
- Sizing — Most Denver-metro homes land between 60k–100k BTU; oversizing wastes money every month.
- Ductwork condition — Leaky or undersized ducts can add $1,000–$3,000 if they need work.
- Venting and permits — High-efficiency units need PVC venting; permit and inspection are included in reputable quotes.
Henderson homes tend to be one-offs — farmhouses, ranches, and houses that have grown by addition over the decades. That means ductwork is rarely textbook: long runs, mixed materials, returns that were an afterthought. The furnace itself is usually straightforward; what separates a good install from a mediocre one out here is the time spent on airflow and venting. Many older Henderson furnaces are early electronic-ignition 80% units, so moving to 96% condensing equipment changes the venting completely — PVC out the sidewall instead of the old flue.
What happens when you call
- We answer and listen. You tell us the symptoms, the equipment's age, and your address. We confirm a licensed installer serves Henderson.
- A licensed local tech arrives. They diagnose, give you repair and replacement options in writing, and answer questions on the spot.
- You contract directly with the installer. The estimate, the work, and the warranty are between you and the licensed company doing the work — not with this guide.
- The installer warranties the work. Equipment warranty from the manufacturer, labor warranty from the installer, both in writing.
How this site works: Mile High HVAC Guide is an independent publisher. We don't install HVAC equipment. When you request help, we connect you with a licensed local contractor and may receive a referral fee from them. It never changes what you pay.
Questions Henderson homeowners actually ask
How long does a furnace replacement take?
Most straightforward swaps are one day — crew arrives in the morning, you're heating by evening. If ductwork or venting needs changes, plan for two.
What size furnace does my house need?
It depends on square footage, insulation, and windows — not on what was there before. A proper installer runs a Manual J load calculation. "Same size as the old one" without measuring is a red flag.
Do I need a permit for this in Henderson?
Yes — Henderson is unincorporated Adams County, so the county handles mechanical permits and inspections. Reputable installers pull it as part of the job.
We're on a larger lot outside town — does that affect the job?
Mostly scheduling, not price. Confirm the installer serves your address when you call — and expect them to ask about access for equipment delivery, since some rural properties have tight driveways.
Get a straight answer on your furnace
Talk to a licensed local installer in Henderson. Free second opinions on replacement quotes — no pressure, no obligation.
Typical response time: under 15 minutes, 7am–7pm daily.