FR-02 · service
Furnaces
For homes keeping gas, a 96% two-stage furnace is quieter and steadier than the single-stage box it replaces. We test combustion on every one.
What is included
On every job, no upsell.
- Two-stage or modulating furnace matched to the coil above it
- New flue or PVC venting, condensate drain with a trap and overflow switch
- Combustion analysis with a printout: CO, O2 and stack temperature
- Gas pressure set at the valve, manifold reading on the invoice
- Filter cabinet upsized to a 4-inch media filter
- Permit, carbon-monoxide alarms checked, city final
How it goes
From site walk to final.
- Day 0
Site walk
Flue path, gas line size, closet clearance and the coil above. Scope the same day.
- Week 1
Permit
Mechanical permit filed. Gas work is inspected.
- Week 2
Install day
Old furnace out, new one set, vented and wired by early afternoon. Combustion test before we leave.
- Week 2–3
Final
City inspection. We attend it.
Recent work
Two jobs like yours.
Questions
Asked on most site walks.
Is a furnace still the right choice in Santa Clara?
For many homes a heat pump now does both jobs. If you want to keep gas, a two-stage furnace is the honest pick. We quote both when it is close.
How do I know mine is at the end?
Cracked heat exchangers show up on a combustion test. Age over 20 years and repeated igniter or board failures are the other signs.
Will it be quieter?
Yes. Two-stage furnaces run on low most of the hour, which is the noise you stop noticing.