Natural gas is the most common heating fuel in Pittsburgh, and the standard 80% AFUE gas furnace is the most common furnace we install. It is the workhorse of Western Pennsylvania heating. Eighty percent of the gas you burn becomes heat in your home, twenty percent leaves through the flue. The technology is mature, the parts are widely available, and a properly sized unit will run reliably for fifteen to twenty winters.

Wahl installs Rheem 80% AFUE gas furnaces as our primary line (Rheem Pro Partner, top dealer tier) and we also install Trane and Ameristar where the application makes sense. Every install includes Manual J sizing, full ductwork inspection, new flue connection where required, and commissioning before we leave.

When a standard 80% gas furnace is the right call

The 80% tier is the right answer when your priority is upfront cost, simplicity, and proven reliability. It is the most common Pittsburgh install for good reason.

• Rental properties and second homes
• Homeowners planning to move within five to seven years
• Replacements for older furnaces in homes without a condensate drain run nearby
• Homes with existing metal flue and chimney venting (no PVC needed)
• Lower upfront budget situations where high-efficiency does not pencil

If you are going to live in the house for ten or more years, we would also walk you through the high-efficiency option and let you compare gas bills against the price difference. Many Pittsburgh homeowners pencil better at 90%+ once they see the long-run math.

What we install

• Rheem 80% AFUE single-stage furnaces (primary Pittsburgh line)
• Rheem 80% AFUE two-stage furnaces (better comfort, similar efficiency)
• Trane 80% AFUE furnaces
• Ameristar 80% AFUE furnaces (value tier)
• Replacement coils and accessories matched to existing AC
• New return air drops and supply trunk modifications where ductwork is undersized
• New thermostat (programmable or smart) with every install
• New flue connection or B-vent inspection

What goes in a Wahl 80% gas furnace install

Every gas furnace install starts with a load calculation, not a thumbnail. Here is what gets done before we leave your house:

1. Manual J load calculation based on square footage, insulation, windows, exposure, and infiltration
2. Static pressure test of existing ductwork to confirm the furnace blower can deliver design airflow
3. Combustion analyzer reading on the new furnace at startup (gas valve pressure, CO output, flue temperature)
4. Temperature rise check across the heat exchanger (must fall inside the data plate range)
5. Gas pressure verification at the manifold under firing conditions
6. New filter, fresh thermostat batteries, photo of the data plate stored in your file
7. Walk-through with the homeowner on the new thermostat, filter location, filter size, and what the furnace should and should not sound like

Common 80% gas furnace problems in Pittsburgh

• Flame sensor coated with carbon, furnace lights and shuts off (the single most common service call)
• Igniter cracked or open (no flame on startup)
• Pressure switch stuck, code on the board, no fire
• Inducer motor bearing noise or seizure
• Limit switch trip from a dirty filter or undersized return
• Gas valve failure (less common but possible)
• Cracked heat exchanger (this is a replacement, not a repair, carbon monoxide risk)
• Control board failure after power surges

Our trucks carry the common Pittsburgh parts. Most repairs are same-day.

Schedule a furnace consult

Call 1-855-GET-WAHL (1-855-438-9245) or schedule online. We answer 24/7. No heat is treated as an emergency.