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AfterFurnace Replacement in San Francisco, CA
Furnace replacement in San Francisco typically costs between $4,500 and $9,800 for a standard single-family home, with most installations completed in one day. The price depends on furnace size, efficiency rating, and whether your ductwork needs modification. Brandt HVAC Co San Francisco handles every replacement with written upfront pricing, a vetted technician you know by name before the door opens, and a 365-Day Done Right Promise on the full installation.
San Francisco’s climate is deceptive. We rarely get hard freezes, but the damp, fog-driven chill that rolls through the Richmond, Sunset, and Twin Peaks neighborhoods makes a reliable furnace a daily necessity from October through May. When your old unit finally gives out, you want a Heating & Furnace in San Francisco team that treats the job with the seriousness it deserves. That’s exactly what we do at Brandt HVAC. Devin Marlowe leads our crew, and every replacement starts with a clear conversation about what you’re paying for and who’s walking through the door. Call (559) 245-8807 any time, day or night, and a live person answers.
One thing worth knowing about our name. Brandt comes from an old word for a firebrand, the burning stick that carried flame from one hearth to another. It’s a fitting namesake for the work of keeping a San Francisco home warm through the long, gray summer days when Karl the Fog sits over the avenues and the thermostat still kicks on at dusk.
When You Need Furnace Replacement
Not every furnace problem means a full replacement. But there are signs that tell us your unit has reached the end of its useful life. A repair might buy you another season, but putting $800 into a 19-year-old furnace that’s already failed twice this winter is rarely the smart play. Here’s what we tell homeowners to watch for:
- Age over 15 years. Most residential furnaces last 15 to 20 years in San Francisco’s salt-air environment. If yours was installed before 2010, replacement planning should start now, even if it’s still running.
- Repair costs climbing. When a single repair exceeds $500 or you’ve had two or more service calls in 12 months, you’re approaching the break-even point. A new furnace carries a fresh warranty and predictable performance.
- Rooms that never warm up. Uneven heating throughout your home in the Outer Sunset or Bernal Heights often points to a failing blower motor or cracked heat exchanger, not just quirky ductwork.
- Strange odors or soot. A persistent burning smell or dark residue around vents can indicate a cracked heat exchanger. That’s both a comfort issue and a carbon monoxide risk. We treat this as urgent.
- Rising gas bills without colder weather. An aging furnace loses efficiency. If your PG&E bill climbs while your habits stay the same, the furnace is working harder to deliver less heat.
- Frequent cycling. A furnace that turns on and off every few minutes is short-cycling. It shortens component life and wastes energy. Sometimes it’s a simple fix; often, on older units, it’s a signal that replacement is cheaper than continued repairs.
If your furnace is showing any of these signs, call (559) 245-8807. We’ll send a technician to assess the system and give you a straight answer, not a sales pitch.
Our Furnace Replacement Process
We’ve refined our replacement process over 20-plus years so there are no surprises. You’ll know the price, the timeline, and the name of the technician handling your home before the work begins. Here’s exactly how it goes:
- Schedule your assessment. Call (559) 245-8807 or book online. A real person answers 24/7. We schedule a visit at a time that works for you, including evenings and weekends.
- Meet your technician by name first. Before arrival, we send you the technician’s name and photo. When they arrive, they’ll be in uniform and show a photo ID badge at the door. If the person standing there doesn’t match who we told you to expect, that visit is on us and we make it right. That’s our Threshold Verified standard.
- Full system evaluation. The technician measures your home’s square footage, inspects the existing furnace and ductwork, checks gas line capacity, and reviews your insulation. In San Francisco, where many homes are older with plaster walls and limited crawlspace access, this on-site evaluation matters. We never size a furnace from a satellite photo.
- Written quote with no surprises. Before any work starts, you receive a written price covering equipment, labor, permits, and cleanup. You approve it first. No work begins until you’ve seen and agreed to the full cost in writing.
- Installation day. We remove the old unit, install the new furnace, connect it to your gas line and ductwork, test for proper airflow and combustion, and haul away the old equipment. Most replacements are done in a single day.
- Post-installation walkthrough and guarantee. You’ll get a written guarantee covering the full installation for 365 days under our Done Right Promise. If anything isn’t right, we return at no charge and make it right. No argument, no fine print.
Furnace Replacement Pricing in San Francisco
Furnace replacement in San Francisco runs between $4,500 and $9,800 for most homes, parts and labor included. Where you land in that range depends on the furnace’s efficiency rating, the complexity of your existing setup, and whether your ductwork needs attention. Here’s a realistic breakdown based on the jobs we regularly complete in neighborhoods like Noe Valley, the Mission, and Pacific Heights:
- Standard efficiency (80% AFUE) replacement: $4,500 – $6,200. A straightforward swap for homes with accessible crawlspaces or utility closets.
- High efficiency (90 – 96% AFUE) replacement: $6,000 – $8,500. Better for San Francisco homes where the furnace runs frequently through the fog-heavy months, and usually qualifies for PG&E rebates.
- High efficiency with minor ductwork modifications: $7,500 – $9,800. Common in older Victorians and Edwardians where the original duct layout needs adjusting for a modern unit.
- Permit fees: $150 – $400, included in our written quote. We handle all permitting with the San Francisco Department of Building Inspection.
The biggest variable is your home’s specific layout. Furnaces installed in tight attic spaces or finished basements take longer. We also see older homes in the Richmond District where the gas line needs upsizing, which adds to material costs. Whatever your situation, you’ll know the exact number before we order a single part. Estimates are always free. Call (559) 245-8807 to schedule yours.
Furnace Brands We Install
We install and service all major residential brands, and we’ll recommend the right one for your home’s heating demands rather than whatever’s in stock on our truck. For San Francisco’s cool, humid climate, we often recommend Daikin furnaces for their reliability and quiet operation in smaller homes with furnace closets near living areas. Bryant offers strong value in the mid-range efficiency category. We also install American Standard units for homeowners who want a premium build with a long service life. Many of our replacements in the Sunset and Parkside neighborhoods are American Standard and Daikin models, chosen specifically for how they handle frequent cycling in damp, coastal air.
If you have a brand preference or a current system you’d like to match, we’ll work with that. The written quote always specifies the exact model number, so you know exactly what’s going into your home.
FAQs – Furnace Replacement
How much does furnace replacement cost in San Francisco?
Furnace replacement in San Francisco typically costs $4,500 to $9,800 including equipment, labor, and permits. High-efficiency models run higher, and older homes with tight access or aging ductwork add to the final number. Call (559) 245-8807 for a free in-home assessment and written quote with no obligation.
Is it cheaper to repair or replace my furnace?
It depends on age and repair cost. If your furnace is under 12 years old and the repair is under $500, repairing usually makes sense. If it’s 15 or more years old and the repair exceeds $500, replacement is typically the better financial decision over the next five years. We’ll give you honest numbers for both options so you can decide with confidence.
Can you replace my furnace same day?
In most cases, we can have your new furnace installed within 48 hours of your approval, and same-day replacement is possible when the schedule allows and permit requirements can be met the same day. Call (559) 245-8807 and a live person will give you the earliest available slot.
Do you remove the old furnace and handle permits?
Yes. Every replacement includes removal and haul-away of the old unit, plus we handle all required permits with the City of San Francisco. Nothing extra to coordinate on your end.
What if something goes wrong after installation?
Every furnace replacement from Brandt HVAC comes with our 365-Day Done Right Promise. If anything about the installation isn’t right within one year, we return at no charge and make it right. It’s in writing, and it’s guaranteed.
Who will show up at my door?
You’ll know the technician’s name and see their photo before they arrive. Every Brandt HVAC technician is background-checked and identity-verified through our Threshold Verified standard. They wear a uniform and show a photo ID badge at the door. If the person who arrives doesn’t match who we told you to expect, that visit is on us.
Still have questions about furnace replacement in San Francisco? Call (559) 245-8807. A real person answers, 24 hours a day, every day of the year. We’ll walk you through the process, answer your questions plainly, and help you decide whether replacement or repair is the smarter choice for your home and budget.
Written by Devin Marlowe, Owner at Brandt HVAC Co San Francisco, serving San Francisco.