Furnace Installation in Las Vegas, NV
Las Vegas winter design temp is 28°F at the 99% interval, and the typical 1,800 sq ft Summerlin tract home needs 45,000 to 60,000 BTU input from a 96% AFUE furnace, not the 80,000 BTU monster many quick-quote installers default to. CheckedHomePros routes new furnace installs to NSCB C-21 pros who run a Manual J, size the unit correctly, install Trane S9V2, Carrier 59TN6, or Goodman GMVC96 condensing furnaces, pull the Clark County mechanical permit, and verify combustion with a Testo 320.
What furnace installation actually involves
Manual J heat-loss calculation for the actual house, not bedroom count.
Manual S equipment selection: 80% AFUE single-stage, 96% AFUE two-stage, or 97% AFUE modulating.
PVC concentric or two-pipe venting for condensing furnaces, sized per the manufacturer table.
Combustion air calc and termination clearances per IFGC 2018 (Clark County adopted edition).
Condensate neutralizer where the discharge runs to a metal drain or a slab penetration.
Southwest Gas reconnection and leak verification.
Clark County mechanical permit, final inspection, and CO alarm verification.
Las Vegas-specific things to know
- Oversized 80,000 BTU furnaces in 1,800 sq ft Summerlin homes that need 50,000, causing short-cycling and uncomfortable temp swings.
- Single-pipe venting on a condensing furnace where the existing B-vent was reused, violating Clark County code.
- Skipped condensate neutralizer where the line discharges to a steel drain, corroding the drain in 3 to 5 years.
- Combustion air starvation in retrofitted Sun City Summerlin closets where the door undercut is below 144 sq in.
- Missed Southwest Gas reconnect inspection, which leaves the homeowner liable for any subsequent gas-side issue.
Typical furnace installation pricing in Las Vegas
$3,500–$7,800
Las Vegas furnace install. 80% AFUE single-stage Goodman GM9S80 or similar: $3,500-$4,800. 96% AFUE two-stage Goodman GMVC96 or Carrier 59TN6: $4,800-$6,500. 97% AFUE modulating Trane S9V2 or Carrier Infinity 98: $6,200-$7,800.
What to ask each pro you compare
- ✓Did you run a Manual J for my house?
- ✓Are you sizing for 28°F design temp, the published Las Vegas value?
- ✓Are you pulling a Clark County mechanical permit?
- ✓Will you verify combustion with a Testo 320 or Bacharach Fyrite?
- ✓Does the install include a condensate neutralizer if it's a 96% AFUE condensing unit?
- ✓Are you Southwest Gas certified for reconnection?
Our vetting standard for furnace installation pros
- ✓Active NSCB C-21 license on file with the Nevada State Contractors Board.
- ✓Manual J / Manual S printout provided before install.
- ✓Combustion analyzer carried on the truck and used post-install.
- ✓Clark County mechanical permit pulled and inspection passed.
- ✓Southwest Gas reconnection certification.
- ✓$1M general liability plus workers' comp on file.
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