Installation
Furnace Installation in Woodstock, GA
A furnace replacement in a Cherokee County house is usually driven by one of three things: a cracked heat exchanger, a system past twenty, or a repair bill that has stopped making sense. We will tell you plainly which one you are looking at, and we will tell you if the answer is to keep the one you have.
What's included
- Heat-loss calculation against the local design temperature, not the Atlanta number
- Gas line sized and pressure-tested for the new input rating
- Venting brought to current code — category, material, slope, termination clearances
- Sheet-metal transition fabricated to fit, not forced with tape
- Condensate handling and neutralisation where the equipment requires it
- Combustion analysis at commissioning, with the readings written down
- Carbon monoxide spot readings at the return and around the appliance
- Permit pulled, inspection scheduled, and manufacturer registration filed within 48 hours
How the visit actually goes
We work out what the house actually needs to heat
North metro runs one to two degrees colder than Atlanta on the 99.6% heating design condition. Sizing a Cherokee County job off the Atlanta number understates the winter load, and an undersized furnace runs flat out on the coldest night of the year.
We check the gas and the flue before we quote the box
Gas line diameter and length against the new input rating, and the vent path against the equipment category. These are the two things that turn a straightforward changeout into a bigger job, and finding them on quote day is much cheaper than finding them on install day.
Install, with the transitions fabricated on site
Old unit out, new one set and levelled, sheet metal made to fit the plenum you have, gas and vent connected, condensate run, and the electrical and thermostat wiring landed properly.
Combustion analysis, then the inspection
Manifold pressure against the rating plate, temperature rise inside the listed range, static pressure measured, flame signal in microamps, draft verified, and a carbon monoxide reading taken. You get the numbers. The inspector comes after.
What it usually costs
Furnace Installation
$4,500–$9,000
Complete replacement of a residential gas furnace in a single-system home, including the permit, a standard sheet-metal transition, a thermostat, and haul-away. Excludes duct modification, gas-line work, electrical upgrades, and multi-system homes.
As of August 1, 2026
Not a quote. Scope and date are stated with every range. Full terms
What the warranty actually covers
Cheryl files the manufacturer registration within 48 hours of every install we do, and you get the confirmation. We do that because the length of the parts coverage turns on it, and a system registered late is a system with a fraction of the coverage its owner thinks it has.
Warranty length depends on registration within roughly 60 days. The warranty is the manufacturer's, not ours. Full terms
About efficiency ratings
We will tell you the rating on any equipment we quote, and we will tell you what it is measured under. What we will not do is convert it into a number of dollars for your house. The variables that decide that — duct leakage, insulation, how you actually run the thermostat, and the weather — are all larger than the difference between two ratings, and we would be guessing at every one of them.
Ratings are federal test-procedure figures. Actual savings vary with the house. Full terms
Members skip the diagnostic fee.The Comfort Club
Questions people ask before booking
How long does a furnace replacement take?
A day for a like-for-like changeout in an accessible location. An attic or crawlspace unit, a vent that has to be re-run, or a gas line that has to be upsized adds time, and a full system replacement with the air conditioner adds a day.
What changes the number?
Gas line sizing, vent category and routing, the condition of the plenum and transitions, condensate handling, whether the unit is in a crawlspace or an attic, and code corrections. The published range below states its scope and what it excludes.
My technician says the heat exchanger is cracked. Should I get a second opinion?
Get one if you want one, and any shop that objects to that is telling you something. Ask to see it — a camera down the exchanger or a visible rust-through both show up on a screen. What you should not do is keep running it in the meantime.
Do I need a permit?
Yes, everywhere we work, and it is in our price. Georgia deletes the administrative chapter of the residential code that would set a statewide permit rule, so this is entirely a local question — and the local answer for equipment replacement is consistently yes.
What does the parts warranty actually cover?
The manufacturer sets the terms, and the length depends on whether the system is registered in time. The registration condition below is the whole of it — read that rather than a number in an advertisement.
Available across 10 towns in Cherokee County and the north metro. See where we work.
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Also in installation
- Heat Pump InstallationHeat pumps and dual-fuel systems sized to the local design temperature, with the backup heat set up honestly.
- Air Conditioning InstallationLoad-calculated replacement of a residential split system, with the scope in writing before a permit is pulled.
- Furnace RepairIgniter, flame sensor, pressure switch or control board — four very different bills, diagnosed properly.