Heating services
Furnace Installation in Renton, WA
A furnace that's the wrong size or poorly installed wastes fuel and wears out early. We size it to your home, install it clean, and back it in writing.
- Licensed & insured
- Fair rates
- Serving all of Washington
Free, no-pressure quote
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Before & after
Heating & Cooling, before and after
A representative example of the kind of heating & cooling work we do. Illustrative only, not a photo of a specific customer's job.
Get a free quoteJoshua replaced my AC mini-split and did an excellent job. He was professional, knowledgeable, and took the time to explain everything clearly. The installation was done quickly and with great attention to detail, and the system has been running perfectly ever since. I really appreciate the honest service and would highly recommend Joshua and his team to anyone needing HVAC work.
Overview
Furnace Installation done right
Westside Comfort Solutions is a licensed HVAC contractor serving Renton, WA that installs right-sized, high-efficiency gas and electric furnaces.
A furnace that's the wrong size or poorly installed wastes fuel and wears out early. We size it to your home, install it clean, and back it in writing.
- Load calculation and correct sizing
- High-efficiency furnace replacement
- American Standard equipment
- Code-compliant venting and gas work
- Up to a 10-year manufacturer warranty
Why it matters
Why furnace installation is worth doing right
A furnace that's the wrong size or poorly vented wastes fuel and wears out early. We run a load calculation on your home, match the furnace to it, and handle the venting and gas work to code, so you get even heat and a system that lasts its full life.
If you're replacing a 15 to 20 year old furnace, the efficiency jump alone is worth a look. Older units often run at 70 to 80 percent AFUE, while a modern high-efficiency furnace runs 95 percent or higher, turning more of every dollar of gas into actual heat.
Time for a new furnace?
Signs it's time to replace your furnace
Replacement is usually the smarter move when:
- Your furnace is past 15 to 20 years old
- Repairs are getting frequent or expensive
- A major component like the heat exchanger has failed
- Heating bills keep climbing as efficiency drops
- Some rooms never warm up evenly
- The burner flame is yellow, or you've had carbon-monoxide concerns
- You want the efficiency of a 95 percent or higher AFUE unit
How it works
What to expect with furnace installation
- 01
Assess and size
We assess your existing system and venting and run a load calculation, so the new furnace matches your home rather than the old unit.
- 02
Recommend and quote
We lay out the right efficiency and size for your home and budget, with a clear price and no upsell.
- 03
Install to code
We set the furnace and handle the venting, gas, and electrical work to code, including any required upgrades.
- 04
Test and verify
We start the system, verify combustion, airflow, and safe shutoff, and confirm even heat before we leave.
Your options
Repair or replace?
When a big repair lands on an older furnace, these rules help, and we'll talk them through honestly:
Fair, upfront pricing
What affects the cost
We quote every install after we size the furnace to your home. The drivers:
- Furnace efficiency (the AFUE rating)
- Gas versus electric, and any venting or gas-line changes
- Whether existing ductwork is reused or modified
- Electrical and code upgrades the install requires
- Equipment brand, warranty term, and old-unit disposal
Every job is different, so you get a clear quote before any work starts, with no surprises. Financing is available, so the right fix doesn't have to wait. We're licensed (WESTSCS752MT) and insured, and we back our work with a 1-year workmanship guarantee.
Warranty coverage
The warranty behind your new system
These are three separate kinds of coverage, and they protect different things. The manufacturer warranty covers the equipment, our workmanship guarantee covers the quality of the installation, and the optional JB Warranties plan covers labor.
We treat every furnace installation job like it's in our own home: diagnose it right, quote it fair, and stand behind the work.
Related services
More heating services
See all heating services.
Questions
Common questions about furnace installation
How long does a furnace installation take?
Most straightforward replacements are done in a day. We'll confirm the scope after we assess your existing system and venting.
Should I replace my furnace or repair it?
If your furnace is aging, failing often, or unsafe, replacement is usually the better value. We give you the honest math on repair versus replace before you decide.
How much can a high-efficiency furnace save me?
Going from an older 70 to 80 percent AFUE furnace to a 95 percent or higher unit means much more of your gas turns into heat instead of going up the flue. The exact savings depend on your home and gas rates, but the difference is meaningful over a heating season.
What size furnace do I need?
The right size comes from a load calculation on your home's square footage, insulation, windows, and layout, not from matching the old unit. An oversized furnace short cycles and wears out faster, so we size it correctly.
When does a furnace have to be replaced for safety?
A cracked heat exchanger is the clearest case. It can leak carbon monoxide, so we recommend replacement regardless of the unit's age or the repair math. We'll always show you what we find.
Local experts, reliable service
Proudly serving Renton, WA and nearby communities
Based in Renton, we serve homes and businesses across Washington with honest diagnostics and quality work that lasts.
- Licensed, bonded & insured
- Upfront, fair pricing with no surprises
- 24/7 emergency service
- Clean, respectful crews
- Local and owner-operated
Service areas
- Greater Seattle / Eastside
- South Sound
- North Sound
- Statewide
Need furnace installation? Let's talk.
Tell us what's going on. We'll diagnose it right and only recommend what you actually need.