November 3, 2025
Austin TX Heating System Replacement Costs — HVAC Guide
Estimated Read Time: 11 minutes
Sticker shock is real when you start researching furnace replacement cost. If you are comparing quotes or wondering whether to repair or replace, this guide explains what affects furnace replacement cost in Central Texas and how to save without gambling on comfort or safety. You will also see when repair makes sense, what code upgrades matter here, and how to time your project for the best value.
Average Furnace Replacement Cost in the Austin Area
For most homes in Greater Austin and Bastrop County, a standard high-efficiency gas furnace replacement typically ranges from $4,500 to $10,500 installed. Compact homes with simple ductwork land near the low end. Larger homes, high AFUE equipment, attic installs, and code upgrades push to the upper range.
What is usually included:
- New furnace and matching components
- Basic code upgrades and safety devices
- Thermostat setup or reuse if compatible
- Haul-away and startup testing
What is often not included until inspection:
- Duct repairs or resizing
- Electrical or gas line corrections
- New flue or condensate routing for high-efficiency units
- Attic platforms, drain pans, and float switches for units above ceilings
Key Factors That Move the Price
Several choices and site conditions have an outsized impact on your total investment.
Equipment Efficiency (AFUE)
AFUE is the percentage of fuel turned into usable heat. Higher AFUE models cost more upfront but waste less energy.
- 80% AFUE: Lower cost, fewer venting changes.
- 90%–98% AFUE: Higher cost, venting and condensate changes, lower utility bills.
Capacity and Sizing
Correct sizing uses a Manual J load calculation. Oversized furnaces cycle often and strain parts. Undersized units run long and struggle on cold nights. Proper sizing protects comfort and your investment.
Installation Location and Access
Attic installations are common in Central Texas. Expect added labor for platforms, lighting, drain pans, float switches, and safe access. Tight closets or crawlspaces can also add time and materials.
Ductwork Condition
Leaky, undersized, or uninsulated ducts waste heat. Minor sealing is affordable. Full replacement or resizing is a larger line item but can transform comfort and efficiency.
Fuel Type and Venting
- Natural gas: Most common, broad equipment options.
- Propane: Requires conversion kit and tank logistics.
- Electric furnace: Lower equipment cost, higher operating cost.
- Oil systems: Less common locally, pricier to replace. High-efficiency gas furnaces often need new PVC venting and a proper condensate drain with neutralizer where required.
Thermostat and Controls
If your existing thermostat lacks modern staging or compatibility, a new smart thermostat may be recommended. Some Austin-area utilities offer rebates for qualified models.
Transparent Itemized Costs You Might See
Homeowners often ask what drives each line on a proposal. Here are common items.
Equipment and Core Materials
- Furnace cabinet, burners, heat exchanger
- ECM blower motor and control board
- Filter rack and transition fittings
Safety and Code Upgrades
- Secondary drain pan and float switch for attic installs
- Smoke and CO detector placement review
- Proper gas valve, sediment trap, and shutoff
- Correct venting clearances and combustion air
Comfort and IAQ Options
- Media filter or cabinet
- UV light or air purifier
- Humidifier or dehumidification strategy
- Smart thermostat with geofencing
Labor, Permits, and Startup
- Removal and disposal of old unit
- City or county permit and inspection
- Start-up testing, combustion check, and homeowner walk-through
Local-Insider Details for Central Texas Homes
Our climate swings from mild winters to sharp cold snaps. Many homes place air handlers and furnaces in the attic, which raises the importance of these details:
- A secondary drain pan with a float switch helps prevent ceiling damage.
- Proper platform and working light improve safety and serviceability.
- Duct insulation and sealing fight attic heat loss.
- Gas line sediment traps and shutoffs protect equipment and meet code.
City permits and inspections help ensure safe installs. In most cases, we secure permits and coordinate inspections for a smooth experience.
Repair or Replace: A Simple Rule of Thumb
Consider replacement when two or more are true:
- The unit is 12–18 years old.
- Heat exchanger or control board failure is diagnosed.
- Repairs exceed 30% of a new system cost.
- Utility bills are climbing despite maintenance.
- Hot and cold spots persist after duct fixes.
Stick with repair when:
- The unit is under 10 years old and parts are available.
- Repair is minor and maintenance has been consistent.
- Ductwork is the main issue and can be corrected.
How to Avoid Overpaying
Follow these steps to protect your budget and comfort.
- Get a proper Manual J load calculation, not a guess by square footage.
- Ask for a written summary of inputs and results.
- Request good, better, best options.
- Compare AFUE, warranties, and comfort features side by side.
- Confirm code items and exclusions in writing.
- Look for drain pan, float switch, gas shutoff, venting, and condensate routing.
- Ask about rebates and tax credits before you choose a model.
- Some smart thermostats and high-efficiency furnaces may qualify.
- Use financing if it preserves cash without inflating total cost.
- Many homeowners prefer low monthly plans for larger upgrades.
Rebates, Credits, and Financing
Efficiency incentives change each year. Today, homeowners can often combine:
- Utility rebates for efficient equipment or smart thermostats
- Federal tax credits for qualifying high-efficiency upgrades
- Manufacturer seasonal promotions
We offer flexible financing options through partners like Greensky, including plans that can reach 0% for select terms when available. Ask for a side-by-side scenario that includes rebates, credits, and monthly payment options so you see the true net cost.
What Happens on Installation Day
A professional install is as important as the brand on the box. Here is our standard process so you know what to expect.
- Protect floors and work areas; verify gas and electrical safety.
- Remove the old furnace; inspect platform, vent, and duct transitions.
- Set the new furnace; align return and supply for smooth airflow.
- Install drain pan and float switch for attic systems; route condensate.
- Update venting and gas connections; test for leaks.
- Wire thermostat and controls; program stages or blower profiles.
- Start, test, and verify temperature rise and combustion.
- Walk you through operation, filter changes, and warranty details.
Warranties and Guarantees That Matter
Read the fine print. Strong coverage reduces risk.
- Manufacturer parts warranty, often 10 years with registration
- Heat exchanger warranty, often longer on premium models
- Labor warranty from the installer
- Maintenance plans that keep warranties valid and equipment efficient
Our team pairs upfront pricing with clear options so you always know what is included. We also stand behind our maintenance work with a No-Breakdown Guarantee on seasonal check-ups.
Safety First: Why Proper Replacement Matters
Furnaces handle gas and high heat. Poor venting or cracked heat exchangers can lead to carbon monoxide risk. Code-compliant installs, CO alarms, and regular maintenance protect your family. If your current furnace is making unusual odors or has frequent cycling, schedule a diagnostic before winter.
Why Homeowners Choose a Local Licensed Team
You deserve licensed pros who know local codes and Texas homes. Our company is bonded and insured, and our licenses are M-17953 and TACLB136431E. We have a 24-hour live answering service and offer same-day availability in many cases. Thousands of 5-star reviews show how we treat homes and families in our community.
Service Area and Local Timing Tips
We serve Austin, Pflugerville, Del Valle, Manor, Buda, Lockhart, Elgin, Bastrop, Dale, and Giddings. The best time to plan a furnace replacement is late summer or early fall. That timing avoids peak-season delays and lets you secure better scheduling and incentives.
Special Offers to Stretch Your Budget
- Special Offer: Furnace Install as low as $134 per month with a Free Proposal. We will come to your home, analyze your needs, and present personalized solutions. Financing options available.
- Special Offer: $75 Furnace Repair Diagnostic. We will diagnose your system and provide a comprehensive report. If we do the work, we will waive the diagnostic charge.
- New Customer Bonus: $25 OFF for first-time customers.
- Seasonal Tune-Up: $55 Heating System Check-Up & No-Breakdown Guarantee. If your system breaks down within 6 months of service, we will return at no cost to diagnose the problem, give you priority scheduling, and credit your original maintenance charge toward the repair.
Call (512) 937-1747 or visit https://www.parobekplumbing.com/ to claim an offer before it expires. Mention the promotion you prefer when you schedule.
What Homeowners Are Saying
"Parobek is awesome. Always super helpful and courteous. We use them for 2 properties for all our HVAC and plumbing issues. They are great with scheduling preventative maintenance as well. Office team as well as technicians are very friendly." –Anita A., HVAC Service
"Jacob and Mason came to my home to replace a leaking water heater. First of all they were ahead of schedule which is always a good thing. Then they asked if I had any questions going forward, which at the time I did not. They are very courteous, professional and friendly... Overall the experience with Jacob and Mason was extremely pleasant and congenial." –Danielle E., Home Service
"Jarrett was the first to respond to our AC emergency over the Fourth of July weekend and he was such a breath of fresh air. He was friendly, empathetic, and extremely knowledgeable... Our entire experience with Parobek was exceptional!" –Crystal J., HVAC Emergency
Frequently Asked Questions
How much does a new furnace cost in Central Texas?
Most replacements land between $4,500 and $10,500 installed. Attic installs, high AFUE models, duct repairs, and code upgrades push costs higher.
Is a high-efficiency furnace worth it?
If you plan to stay in your home, higher AFUE units can lower utility bills and improve comfort. Savings depend on gas rates, usage, and duct condition.
Do I need new ductwork with a new furnace?
Not always. We test and inspect first. Minor sealing may be enough. If sizing or leakage is poor, duct changes improve comfort and efficiency.
Can I replace a furnace without a permit?
In most cases, no. Safe, code-compliant installs require permits and inspections. We handle permits and coordination for you.
Are there rebates or tax credits for furnaces?
Yes, but models must meet specific criteria. Ask us to check current utility rebates and federal credits before you choose equipment.
Bottom Line
The true furnace replacement cost depends on efficiency, location, duct condition, and code upgrades. Smart planning, verified sizing, and local pros protect your budget and comfort. For trusted help with furnace replacement cost in the Austin area, schedule a free proposal today.
Ready to Price Your Project?
Call Parobek Plumbing & Air Conditioning at (512) 937-1747 or book at https://www.parobekplumbing.com/. Mention: $134/mo Furnace Install + Free Proposal or $25 OFF First Time Customers. We will present clear options, secure permits, and install to code so you stay warm all winter.
About Parobek Plumbing & Air Conditioning
Family-owned and operated with 100+ years of combined experience, Parobek delivers 5‑star service across Greater Austin and Bastrop County. We back our work with upfront pricing, strong warranties, and a 24-hour live answering service. Our licensed team holds Texas licenses M-17953 and TACLB136431E. We have won Bastrop County Best for Plumbing and for Heating and Air Conditioning for 5 years. Count on respectful techs, clean work areas, and options that fit your home and budget.