Every replacement starts with a load calculation to match the new furnace to the home. We check the square footage, insulation, ductwork condition, and window exposure to get the BTU output right. No guessing, no oversizing.
- Local & Professional
- 24/7 Emergency Service
Furnace Replacement in Houston, TX - Reliable Service From Start to Finish
75 Degree AC delivers furnace replacement in Houston TX for gas furnaces, electric furnaces, condensing units, and every residential setup. Our trusted contractors remove the old unit, size the replacement correctly, handle permits and inspections, and test the new system before leaving.
- Emergency Appointments Available
- Home & Commercial
- Easy Scheduling
About us
Experienced Furnace Replacement Contractors Serving Houston
75 Degree AC replaces old and failing furnaces across Houston every week. Our contractors work on gas furnaces, electric furnaces, condensing and non-condensing units, and systems in every configuration from upflow to horizontal. That hands-on experience with furnace replacement helps us spot issues during removal that other contractors might miss, like undersized ductwork, corroded gas lines, or a flue pipe that no longer meets code. Every furnace replacement starts with a load calculation to make sure the new unit matches the home. The quote covers equipment, labor, permits, old unit disposal, and the city inspection in one price. Nothing changes after the quote is accepted. When a homeowner is deciding between repairing an older furnace or replacing it, we explain both options clearly so the decision is based on facts, not pressure. Our furnace replacement service in Houston is backed by fully licensed and insured contractors. We pull the permit, schedule the city inspection, and register the manufacturer warranty before closing out the job. Same-day and next-day availability is offered for urgent replacements, especially when a cracked heat exchanger or carbon monoxide concern makes waiting unsafe.
- Ventilation System Maintenance
- Indoor Air Quality Testing
- Cool Craft Custom Solutions
Experience
25+
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Roberto Ramon
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Professional HVAC Services in Houston TX by a Local HVAC Contractor
01
Gas Furnace Install
Most Houston homes run on natural gas for heating. Our gas furnace installation service includes gas line connection.
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02
Electric Furnace Install
Homes without access to natural gas rely on electric furnaces for heat.
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03
High-Efficiency Furnace
A condensing furnace captures additional heat through a secondary heat exchanger.
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04
Furnace and Ductwork
Some installations require ductwork changes to support the new furnace.
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What Customers Say About Our Service
Professional Furnace Replacement Services We Provide in Houston, TX
Gas Furnace Swap
Most furnace replacements in Houston involve swapping an older gas unit for a new one. Our gas furnace replacement service covers gas line inspection, new unit positioning, flue pipe routing, combustion analysis, and gas pressure adjustment. We install both condensing and non-condensing gas furnaces matched to the home's venting setup.
Electric Furnace Swap
Homes running electric heat get the same full-scope replacement. Our electric furnace replacement service includes breaker verification, electrical hookup, heating element testing, and airflow balancing. We match the new unit to the existing duct system and electrical panel capacity.
Efficiency Upgrade
Homeowners replacing an older standard-efficiency furnace can step up to a condensing unit with a higher AFUE rating. Our high-efficiency furnace replacement service includes PVC vent pipe routing, condensate drain installation, and a full efficiency verification to confirm the new system is performing at its rated output.
Emergency Replacement
A cracked heat exchanger or a carbon monoxide concern turns a furnace replacement into an urgent job. Our emergency furnace replacement service prioritizes same-day removal of the failed unit and fast installation of a properly sized replacement so the home is safe and heated as quickly as possible.
Ductwork Modification
Some replacements require changes to the existing ductwork to fit the new furnace properly. Our furnace replacement and ductwork service includes plenum modification, transition fittings, ductwork reconnection, and airflow balancing across all supply and return vents to make sure every room gets proper heat.
What Customers Say About Our Service
Why Houston Homes and Business Trust 75 Degree AC for Furnace Replacement
When you need furnace replacement in Houston, 75 Degree AC brings the right process and experience to every job..
Fully Insured Work
Every furnace replacement is performed by fully licensed and insured contractors. All work is backed by a quality workmanship guarantee, and the manufacturer warranty is registered before the job is closed out.
Single Price Guarantee
Equipment, labor, permits, old unit disposal, and the city inspection are all covered in one quote. The price is set before any work starts and does not change. There are no add-on charges after the job begins.
Gas and Electric Ready
We replace gas furnaces, electric furnaces, condensing units, and non-condensing systems. When the home is switching fuel types or staying with the same setup, our contractors have the experience to handle it.
Schedule Your Furnace Replacement Service
Call (713) 598-2737 to schedule furnace replacement with 75 Degree AC. Free estimates are provided for every job. Same-day and next-day availability across the Houston metro
How We Replace Your Furnace in Houston Step By Step Process
75 Degree AC follows the same structured process on every furnace replacement in Houston, from the first inspection to the final startup test.
Inspect Current System
Our contractors check the existing furnace, ductwork condition, gas line sizing, and electrical panel capacity. A load calculation determines the right size for the replacement so the new unit fits the home properly.
Select New Equipment
Based on the load calculation and home layout, we present furnace options that match. Gas vs. electric, standard vs. high-efficiency, and single-stage vs. two-stage are explained clearly. The all-inclusive price is provided before any commitment.
Disconnect and Remove
The old furnace is disconnected from gas, electrical, and ductwork connections. The unit is removed from the home and disposed of properly. Gas lines and electrical connections are capped safely before the new installation begins.
Position and Connect
The new furnace is set in place and connected to gas lines, electrical wiring, flue piping, and ductwork. Thermostat wiring is verified and tested. All connections are sealed and checked against Houston building code requirements.
Run Full Startup Test
The new furnace runs through a complete heating cycle under full load. Combustion analysis, gas pressure, temperature rise, and airflow are all measured and confirmed. The manufacturer warranty is registered and the homeowner is walked through the system controls.
Our Recent Projects in Houston
When Replacing a Furnace Makes More Sense Than Repairing It
Repairing a furnace is the right call when the system is relatively new, the failure involves a single component, and the cost is well below the price of a new unit. A failed igniter, a worn flame sensor, or a faulty gas valve can all be replaced without touching the rest of the system. In those cases, the furnace still has years of reliable service ahead and the repair makes financial sense.
Replacement becomes the better option when the furnace has a cracked heat exchanger, a history of repeated breakdowns, or an efficiency rating far below current standards. Parts that are discontinued, a system that short cycles constantly, and gas bills that keep rising all point to equipment that is costing more to keep running than a properly sized new furnace would. Our contractors at 75 Degree AC evaluate the full situation and present both options with clear pricing so the homeowner can make the right decision.
What Parts Of Houston Does 75 Degree AC Serve?
75 Degree AC provides premium HVAC services across Houston, TX, supporting residential and light commercial properties throughout the city. Our service coverage reflects how HVAC demand actually works in Houston, from central neighborhoods to outer city districts. Customers rely on us for consistent service standards, clear communication, and dependable system support city-wide.
Downtown
East Downtown (EaDo)
Westwood
Midtown
Spring Branch (Central, TX)
University Place
Montrose
Gulfton
Meyerland
The Heights
Westbury
Eastwood
River Oaks
Memorial
Harrisburg / Manchester
Third Ward
Lazybrook / Timbergrove
Spring Branch (East Houston)
South Belt / Ellington
Trinity / Houston Gardens
Clear Lake (Houston City Portion)
Richmond
Book Furnace Replacement in Houston Today
When your furnace is no longer safe or efficient enough to keep running, it is time for a properly sized replacement. Call 75 Degree AC at (713) 598-2737 to schedule furnace replacement in Houston today.
Frequently Asked Questions FAQ's
How Do I Know When My Furnace Needs to Be Replaced in Houston?
Frequent breakdowns, rising gas bills, uneven heating, and a unit that short cycles or runs constantly are all signs the furnace is nearing the end of its service life. A cracked heat exchanger is the clearest indicator that replacement is needed right away.
What Happens to the Old Furnace When a New One Is Installed?
Our contractors disconnect the old furnace from gas, electrical, and ductwork, remove it from the home, and dispose of it properly. Disposal is included in the replacement quote at no extra charge.
Can a Furnace Be Replaced With a Different Type or Size in Houston?
Yes. A gas furnace can be replaced with a higher-efficiency gas unit, or in some cases switched to electric. Our contractors complete a load calculation to make sure the new unit is the right size for the home.
Is a Cracked Heat Exchanger a Reason to Replace the Entire Furnace?
In most cases, yes. A cracked heat exchanger can allow combustion gases into the home’s air supply, which creates a safety concern. The cost of replacing just the heat exchanger often comes close to the cost of a full replacement with a new warranty.
How Long Does a Furnace Replacement Take From Removal to Startup?
Most single-unit furnace replacements are completed in one day. Jobs that require ductwork changes, a fuel type switch, or a different furnace configuration may take an additional day. Our contractors provide a clear timeline before work begins.
Does 75 Degree AC Handle Permits and Inspections for Furnace Replacement?
Yes. We pull all required city of Houston permits, schedule the inspection, and handle all paperwork. The homeowner does not need to visit any city office or coordinate with inspectors directly.
About Houston, TX
Older Houston, TX neighborhoods like The Heights, Garden Oaks, and Oak Forest have homes with furnaces that have been in service for well over a decade. Heat exchangers in those systems have spent years exposed to Houston’s hot and humid climate, and corrosion builds up even during the months when the furnace sits idle. By the time the first cold front arrives, a corroded component that looks fine in spring can crack under the thermal stress of a full heating cycle.
In areas like Meyerland, Alief, and the southwest side of the metro, many homes were built with builder-grade furnaces that were sized to meet minimum standards. As those units age, they lose efficiency, run louder, and break down more often. Houston’s heating season is short, but a furnace failure during a cold snap leaves the home without heat at the worst possible time. Replacing an aging furnace before winter, with a unit that is properly sized and professionally installed, is the most reliable way to avoid that situation.
