Furnace Installation
Properly sized 80% or 95%+ AFUE gas furnaces installed by combustion-certified techs. Manual J load calc, written quote, every install combustion-tested at commissioning. Lebanon, Zionsville, and all of Boone County.
Oversizing Is the #1 Install Mistake
Half the Indiana furnaces we replace are oversized by 20-40%. They short-cycle, blow the heat exchanger, and die at year 12 instead of year 22. We do an ACCA Manual J load calc on every install — not just match-and-replace whatever's there now.
Manual J Load Calc
Whole-home heat-loss calculation. We size to actual demand, not "what was here before."
Gas Line + Vent Check
We verify gas line CFH and B-vent/PVC vent sizing matches the new furnace before we quote.
Written Quote
Furnace, install labor, gas piping, venting, condensate kit, permit, tax — every line itemized.
80% vs 95%+ AFUE — Which Is Right
For Indiana climate the answer is usually 95%+ AFUE. The 15-year fuel savings outpace the upfront cost. But if your existing chimney is shared with a water heater, switching to PVC venting needs a chimney liner — that's a budget conversation.
80% AFUE (Single-Stage)
Vents into chimney. Lower install cost, no condensate. Reasonable choice if budget is tight or the chimney is dedicated to the furnace only.
$4,500-$6,500 installed
95%+ AFUE (Two-Stage / Variable)
PVC sidewall vent, condensate drain, quieter, much lower gas bills. 10-15% better real-world efficiency. The right choice for most homes.
$6,500-$10,500 installed
Includes Manual J, permit, gas line and venting, condensate, equipment, install, and tax. Financing available.
Brands We Install
Carrier
Authorized dealer. Performance and Infinity gas furnaces.
Trane
S9V2 and XC95m variable-speed lines.
Lennox
SLP99V and EL296V for premium efficiency.
Goodman
GMVC96 and GMSS96 — budget tier with solid parts availability in Indiana.
Every Furnace Install Includes
The Work
- Manual J load calc
- Gas line + venting (B-vent or PVC)
- Condensate management (95%)
- New high-limit / inducer wiring
- Thermostat (if needed)
- Combustion analyzer commissioning
The Paperwork
- Mechanical permit (Boone County / city)
- Gas piping permit (if modified)
- Manual J written report
- Combustion analysis report
- Manufacturer warranty registration
The Warranty
- 10-yr parts + 20-yr heat exchanger
- 2-yr labor (our shop)
- 1-yr satisfaction return
- Plan-member lifetime repair lock
Furnace Installation FAQ
How long does a furnace install take?
Same-flue swap with no venting changes: one day, 5-7 hours. 80% to 95% conversion with new PVC venting and condensate routing: 1.5-2 days.
Do you replace the AC at the same time?
If the AC is over 12 years old, usually yes — the labor overlap saves you $1,500+ vs. doing them separately. We'll quote both ways so you can decide.
What's the difference between single-stage and two-stage?
Single-stage runs full blast or off. Two-stage runs at ~67% most of the time and kicks to 100% only on the coldest days — quieter, more even heat, longer equipment life. Worth the upgrade if budget allows.
Do I need a permit?
Yes. Boone County and most local municipalities require a mechanical permit for new furnace installs. We pull it; the inspection is part of our process.
What about federal tax credits?
The 25C credit for high-efficiency gas furnaces is still active in 2026 (up to $600). Heat pumps get a larger credit. We provide the AHRI certificate for your tax filing.
Should I get financing or pay cash?
If you qualify for the 0% intro promotional terms, financing is essentially free money. If you'd otherwise pull from a 401k or HELOC, financing usually wins. Current terms here.
Get a Real Furnace Quote
Free in-home estimate. Manual J load calc. Written itemized quote. No high-pressure sales.