Morton Furnace Repair · Collierville, TN
Furnace Replacement in Collierville, TN Homes
Call us about a new furnace, and we get a local HVAC company on the line.
Furnace replacement in Collierville, TN needs a mechanical permit from the Town. The Town's 2018 IRC requires sizing by ACCA Manual S on Manual J loads. A local HVAC company runs the load calculation, pulls the permit, and requests the inspection, so ask which efficiency level and vent type it recommends.
Who Calls About This
Furnace replacement calls in Collierville, TN come from 3 groups of owners, and owners live in 79.9% of the Town's occupied homes.
- Homeowners with an aging furnace
- Census data dates 11.0% of Collierville homes to 1979 or earlier, and you want to know whether one more repair still makes sense.
- Condo and townhome owners
- Tennessee condo law puts your own unit's furnace on you and the common elements on the association. The declaration can change that split, so we suggest reading it before you book.
- Landlords who own houses or small rentals
- The 2018 IRC that Collierville enforces requires heat able to hold 68°F in habitable rooms, and portable heaters do not count. Renters bring a worn-out furnace to the landlord first.
Inside a Standard Furnace Repair
A local HVAC company handles 8 tasks on a standard furnace replacement, per ACCA, the manufacturer's manual, and the Town's code:
Calculates the heating load with ACCA Manual J, the ANSI-recognized standard for sizing loads.
Selects the furnace size with ACCA Manual S, as section M1401.3 of the 2018 IRC requires.
Matches the vent to the furnace: metal or Type B for an 80% model, PVC or ABS for a 90%-plus model.
Routes a condensing furnace's drain to an indirect waste within 2 feet or to an approved French drain, per the Town's amendment.
Provides combustion air per NFPA 54, as the manual requires.
Pulls the Town permit and requests the inspection as the permit holder.
Starts the furnace and confirms the temperature rise falls within the nameplate range.
Explains the furnace maintenance the manual sets: a monthly filter check and a yearly inspection.
Commonly extra: ductwork changes, a new vent or chimney liner, electrical upgrades, pull-down attic stairs, and an AC replacement when both systems go at once. Before you call, check whether your AC is as old as the furnace, since replacing both at once changes the job.
Ask for the Manual J load numbers and the vent type your new furnace uses.
(901) 613-0388Local Furnace Issues and What Your HVAC Company Does
The table pairs 5 Collierville, TN replacement situations with what the HVAC company does for each.
| What you notice | What your HVAC company does |
|---|---|
| Moving from an 80% furnace to a 90%-plus model | The company swaps the Category I metal vent for PVC or ABS and adds a condensate trap for the Category IV condensing model. |
| The furnace sits in the attic | Your HVAC company plans permanent or pull-down stairs to the equipment, which Collierville's code amendment requires when access comes from the floor below. |
| No drain sits near the new condensing furnace | The company runs the condensate to an indirect waste within 2 feet or an approved French drain, sized by tonnage per the Town's amendment. |
| The old furnace shares a vent with another gas appliance | A local HVAC company checks the remaining vent's size. The manual warns that removing a Category I furnace can leave the original vent wrong-sized for the appliances still on it. |
| A repair quote nears the price of a new furnace | The company prices both paths, and the guide to repair cost factors covers the repair side. |
Steps From the First Call
Furnace replacement follows 5 steps from your first call:
- 1
Call and describe the current furnace
You call us with the furnace's age, its fuel type, and the home's rough size. We get a local heating and cooling company that handles replacements on the line.
- 2
Let the company size the furnace
The HVAC company calculates the load with ACCA Manual J and selects the size with Manual S. Ask for a written estimate before work starts.
- 3
Choose the efficiency level and vent
You pick an 80% Category I furnace or a 90%-plus Category IV model, and the second choice adds plastic venting and a condensate drain.
- 4
Approve the permit before work begins
The permit comes first, since the Town doubles the fee when work starts before it is issued.
- 5
Pass the Town inspection
The permit holder requests the inspection by phone, email, or the Town's iWorQ portal. Ask for the final inspection result for your records.
What Drives the Price of a Furnace Replacement
No allowed source publishes a Collierville, TN price for a furnace replacement. The Town doubles the permit fee when work starts early, so we count permit timing among the 6 factors below.
Factor 1
Heating Load
The Manual J load sets the furnace's capacity, and capacity drives the equipment price.
Factor 2
Efficiency Level
A 90%-plus condensing furnace adds PVC or ABS venting and a condensate trap that an 80% model leaves out.
Factor 3
Vent Changes
A switch from Category I metal venting to Category IV plastic venting adds vent work, per the manufacturer's manuals.
Factor 4
Condensate Disposal
With no indirect waste within 2 feet, the Town's amendment calls for an approved French drain sized by tonnage.
Factor 5
Attic Stairs
An attic furnace without permanent or pull-down stairs adds stairs to the job under Collierville's amendment.
Factor 6
Permit Timing
The Town doubles the permit fee when work starts before the permit, so the permit comes first.
On the call, ask how the efficiency level, the vent change, and the condensate drain each move the price of your replacement.
(901) 613-0388Codes and Permits That Apply in Collierville
The Town of Collierville requires a permit for a mechanical change-out and a state or county licensed contractor for all mechanical work. Ask the company for its license number, and confirm who holds the permit and requests the inspection through iWorQ.
The Town enforces the 2018 International Mechanical Code, Fuel Gas Code, and IRC under Ordinance 2020-06, effective January 1, 2021. New plans and permits from January 1, 2027 fall under the 2024 International codes, the 2021 IECC, and the 2023 NEC. We recommend asking which edition matches your permit date, since a permit filed in January 2027 falls under the newer codes.
Homes in Germantown, TN answer to a different office, since the Shelby County construction code enforcement office inspects residential buildings there. Collierville's Building and Codes Division sits on the east side of Town Hall, 500 Poplar View Parkway, (901) 457-2310.
Coverage and Rebate Questions
No federal 25C tax credit applies to a furnace placed in service after December 31, 2025, per the IRS. MLGW lists no furnace rebate of its own, but its Share the Pennies grants for low-income Shelby County homeowners can cover HVAC repair or replacement. More answers sit in furnace and AC questions, so ask whether your project fits the grant terms.
The sample HO-3 homeowners form excludes wear and tear and mechanical breakdown. Ask your insurer before you count on a claim for an aging furnace.
Repair or Replace an Older Furnace: How Do You Decide?
You decide on 3 findings: the repair price, the venting and heat exchanger results, and the efficiency gain from a new unit. The HVAC company tests the venting and prices both paths, and our guide to repairing a gas furnace covers the repair side. Ask for written estimates on both paths before you choose.
Does a Furnace Replacement Need a Permit in Collierville?
Yes, a furnace replacement needs a mechanical permit, since the Town of Collierville lists a mechanical change-out as permit work. Town rules require a licensed contractor to pull trade permits, and work begun before the permit doubles the fee. Ask who holds the permit; we flag it because the Town takes inspection requests only from the person who obtained it.
What AFUE Does a New Furnace Need in Tennessee?
A new non-weatherized gas model needs at least 80% AFUE under the federal efficiency standard in force. ENERGY STAR Version 5.0, effective July 31, 2026, sets 95% AFUE for US South states, Tennessee included. The HVAC company matches the vent to the level you pick, so ask which level fits your vent and drain options.
Collierville Details That Change the Repair
- The NOAA Collierville station logs 3,292.7 heating degree days a year, 417.8 more than the 2,874.9 at Memphis International. We use the Collierville station, not the airport, because a load calculation for a house here starts from that colder baseline. Ask for the Manual J report.
- The median Collierville home was built in 1998, per Census data, and 55.1% of homes date from 1990 through 2009.
- The Collierville Historic District holds 127 properties on about 70 acres. Its guidelines place exterior mechanical units at the side or rear, screened, so ask about placement before an outdoor unit moves.
Before you dial
Questions Before You Call
Open any question below for its answer
How Long Does a Furnace Last in Collierville?
No source on this site's list publishes a furnace service life for Collierville, TN, so age alone does not settle repair or replace. A local HVAC company weighs the repair price and the venting and heat exchanger results. Ask for those findings when you call.
What Happens When Furnace Work Starts Before the Permit?
The Town of Collierville doubles the permit fee when work begins before the permit, per its mechanical permit application. The company pulls the permit before the old furnace comes out, so ask for the permit number.
Does MLGW Pay a Rebate on a New Gas Furnace?
No, MLGW lists no rebate of its own for this equipment, and its energy-saving page links out to TVA EnergyRight instead. Ask which programs apply to your home before you pick a model.
Does a 90% Furnace Use a Different Vent Than an 80% Furnace?
Yes, an 80% furnace is Category I and vents through metal or Type B pipe, per the manufacturer's manuals. A 90%-plus condensing furnace is Category IV and vents through PVC or ABS. The HVAC company changes the vent and adds a condensate drain when you move up.
Can You Still Buy an 80% Gas Furnace in 2026?
Yes, the federal minimum for non-weatherized models is 80%. The 95% minimum applies to furnaces made on or after December 18, 2028, as the federal rule stands in November 2026. That step requires condensing furnaces in practice, so ask which vent each choice uses.
Other Services to Consider
- Furnace Safety Inspection
Flue, vent, combustion air, and safety control checks show whether a furnace is fit to keep running.
- Furnace Short Cycling
What a high-limit shutoff means, the airflow and flame checks behind it, and when sizing enters the repair.
- AC Repair
See what a Collierville HVAC company checks on a central AC and when R-410A parts still apply.
This page relies on 35 public documents, such as records from ACCA, International Code Council, and US Department of Energy. Find each one and its check date in the records behind each page list.
Morton Furnace Repair
Reach a Heating Company That Serves Collierville
Call us about the replacement you are weighing, and we bring a local heating and cooling company onto the call.
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