How Much Does Furnace Installation Cost in Coeur d'Alene? (2026)

Furnace installation in Coeur d'Alene ranges $3,500 to $8,000 for most residential gas systems. High-efficiency condensing furnaces (90%+ AFUE), crawl space installations, or work requiring venting conversion or gas line upgrades push cost toward the high end or above it.

What Drives the

Price

The furnace itself. Standard 80% AFUE units cost less upfront. High-efficiency 96-98% AFUE units run $500-$1,500 more but recover that gap in reduced gas bills over CdA's six-month heating season.

Sizing accuracy. A proper Manual J load calculation ensures correct system size. Oversized furnaces short-cycle and wear faster; undersized systems run constantly without reaching setpoint. Expect $300-$500 for this step -- it is worth it.

Installation complexity. Accessible basement replacement with existing gas line is the base scenario. Crawl space access, gas line upsizing, or fuel conversion adds $500-$2,000.

High-efficiency venting conversion. Condensing furnaces use PVC exhaust/intake through an exterior wall, not a chimney flue. Converting from 80% to 96%+ adds $200-$600 for venting work.

Rebates Available

Idaho Power and Avista Utilities offer rebates for high-efficiency furnace replacements. As of 2026, rebates can offset $100-$400 of total cost. Ask about current availability.

Frequently Asked

Questions

How long does installation take?
4-8 hours for a standard basement replacement. Crawl space or complex venting work extends to a full day.

80% vs. 96% AFUE -- which should I get in CdA?
In a climate where furnaces run October through April, the higher efficiency typically pays back within 3-5 years through reduced gas bills.

Should I replace before failure?
If your system is 15+ years old with recurring issues, planned replacement gives you sizing control, financing options, and avoids emergency scheduling in January.

Call (208) 555-0194. See also: Furnace Installation | Heat Pump Service