Furnace Replacement in Cumming, GAThree clear options.

Good, Better, Best: what changes

Your estimate shows three options with model numbers, warranty and monthly payment for each. This is what usually separates them.

80% or 96% AFUE?

AFUE is the share of the gas you pay for that becomes heat in your home. An 80% furnace vents through a metal flue; a 90% or higher furnace is condensing, vents through PVC pipe and needs a condensate drain.

In North Georgia's short heating season, the higher-efficiency furnace saves less than it would up north, so the right pick depends on how long you plan to stay, where the furnace sits (attic, basement or closet) and whether venting changes are needed. We show the price difference next to the expected savings so you can decide.

Signs it may be time

• 15 years or olderMost furnaces here last 15 to 20 years. Past that, parts get harder to find.
• Repairs adding upTwo or more repair calls in a season, or one large repair on an old unit.
• Uneven heatRooms that never warm up, or a furnace that runs constantly on cold nights.
• Rising gas billsBills climbing year over year with the same thermostat settings.
• Replacing the AC tooA new furnace and AC together cost less in labor and give you a matched system.

What is included

One price covers the whole job:

• Load calculationWe size the furnace from your home, not from the old unit's label.
• Removal and haul-awayOld furnace removed and disposed of.
• InstallationNew furnace, gas and electrical connections, venting and condensate drain as needed.
• Permit and inspectionWe pull the permit and handle the county inspection.
• Startup and testingGas pressure, temperature rise and safeties checked and recorded.
• Warranty registrationWe register the 10-year parts warranty and back the install with 1 year of labor.

From estimate to warm house

1. Home visitWe measure, look at the ducts, venting and gas line, and answer questions.
2. Estimate on your phoneGood, Better and Best with prices and monthly payments.
3. Approve onlinePick an option and sign when ready. No pressure.
4. Install dayUsually one day, then we walk you through the new system.

What moves the price

Efficiency and staging have the biggest effect. Size (BTU) matters less than most people expect. Venting changes, such as switching from a metal flue to PVC for a 90%+ furnace, attic installs, and duct or return-air changes add cost. Your estimate lists these separately so nothing is hidden.

Not ready to replace yet? See furnace repair prices, or read about furnace warranties.

Questions we hear

Prices and details reviewed November 2026.