When a San Francisco homeowner needed dependable heat, we carried out a Carrier furnace installation that replaced a worn-out unit with a new 80% two-stage gas furnace. The tight utility closet made for a careful fit, so we rebuilt the venting and gas connections cleanly and left the homeowner with quiet, even warmth throughout the house.
What we installed
The new Carrier furnace is an 80% efficiency, two-stage model — a great match for a mild-winter city where the heat runs often but rarely at full blast. Two-stage operation lets the furnace run long, gentle cycles on low most of the time, which means steadier temperatures and quieter airflow. We fit it into the existing closet beside the water heater and reconnected everything to code.
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- Removed the old furnace and prepped the closet
- Set and secured the new 80% two-stage Carrier furnace
- Rebuilt the flue and combustion venting
- Reconnected the gas supply with a new flex connector and shutoff
- Tied the furnace back into the existing ductwork
- Tested ignition, staging, and safe operation before finishing
Why a two-stage furnace works in San Francisco
San Francisco’s cool, foggy climate means the heater is on more days than not, but the demand is usually light. A two-stage furnace shines in exactly those conditions: it spends most of its time on the low, efficient stage and only ramps up on the coldest mornings. That translates into consistent comfort, less noise, and better fuel use than an old single-stage unit. You can read more on our furnace installation page.
A clean, safe fit
Furnace swaps in small closets are all about the details — proper venting clearances, a secure gas connection, and tidy sheet-metal work. We took the time to get each of those right so the system runs safely and reliably for years to come.
Is your furnace getting old or struggling to keep up in your San Francisco home? Reach out to Nur HVAC for a free estimate and we will help you pick a furnace that fits your space and your comfort needs.
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Reviews
Trusted by your neighbors
“Adlan did a great job repairing my 20-year-old heating unit under my house. He had to crawl about 10 yards under the crawl space to get to the unit and had to work in cramped conditions. He also re-opened some ducts that had become closed over the years and also came back the next day to replace some rusted out ductwork that had been corroded by the ocean air. The heating system had been neglected for 20 years, and was long overdue. Everything works again and the air pressure in my back room registers actually has flow for the first time in many years. Great job and the price was quite reasonable. I will be calling NUR HVAC back regularly to make sure my heater never gets to that state again.”
“NUR installed a ductless multi-zone Mitsubishi mini-split system for us this spring after our 100-year-old lovely monster of a gas boiler died. It's so far out of code that no one will repair it, and we were tired of being cold! The new system is electric with a heat pump on the roof, and it includes AC for the six days a year when my usually foggy neighborhood needs it. We chose NUR because they offered competitive prices and clear communication, and they were able to place the indoor units exactly where we wanted them. The installation took just a couple of days and they were kind and efficient. If you are looking to get a job like this done, you should give them a call.”
“I cannot recommend Artur and the team behind NUR HVAC enough. I thank them every single day that my house is so much more comfortable than it was. Their installation of my heat pump was top-notch, and they didn't deceive me like a lot of other contractors. Stand-up guys doing excellent work at a reasonable price. You will never regret hiring them. And if even the tiniest thing goes wrong, they will come back and make it right, at no additional cost. If you need an honest, trustworthy HVAC installer, they are by far the best I've found. Super-sweet people and incredibly skilled engineers. You really can't ask for anything better than that.”
Google Reviews
What our customers say on Google
“Phenomenal Service – Furnace Replacement & Heat Pump Installation! I can’t say enough good things about the team at Nur HVAC! They recently installed a brand-new AC heat pump system for us and replaced our old gas furnace, and the experience was top-tier from start to finish. The installation was completed with incredible attention to detail, craftsmanship, and professionalism. They found smart, creative ways to route all the new wiring while opening as few walls as possible. For the couple of small spots where wall access was necessary, they made sure everything was fully patched, finished, and painted so seamlessly you’d never know any work had been done. On top of that, what stood out the most was their commitment to going above and beyond—they stayed late working extra hours just to ensure our Google Nest thermostat was fully integrated, tested, and working perfectly before they left. It’s rare to find contractors who are this reliable, clean, knowledgeable, and genuinely dedicated to customer satisfaction. If you need any HVAC work done, save yourself the hassle and hire Nur HVAC. Outstanding job all around!”
“I’ve compared 5 different companies to replace my house heater - Nur HVAC is the best! They gave the best quote and best explanation and not trying to upsell me. The installation team (2 guys) were on time, polite and very friendly! They got the job done within a day and was thorough with the walkthrough with me. Highly recommend!”
“NUR HVAC just completed installation of a Mitsubishi heat pump system in my San Francisco home, replacing a 38-year-old Lennox gas furnace. I couldn't be more pleased with the quality of the work and the professionalism shown during the process. In particular, I wanted to commend Artur and Vladimir, the NUR technicians who did the beautiful install. Both guys were extremely polite and respectful, for example, putting on shoe covers whenever they entered the house. Artur was also very fastidious in running the ancillary electrical feeds to my main service panel. What a neat job! Fedor, who came to do the initial assessment, was a great resource and answered all my questions regarding scheduling, warranty, maintenance, etc. He offered several options during the bidding process without any pressure to come to a quick decision or attempts at “upselling.” In the end, their quote was very competitive, and fair given the quality of the work and the final product. Being a Mitsubishi Diamond Contractor, NUR was able to offer a 12-year warranty on parts and labor. The bottom line is NUR is a top quality outfit and it was easy to see that they take great pride in their work and genuinely care about their customers. NUR may be the best contractor I’ve ever used. Definitely, 5-Star!”
“Artur at NUR was very knowledgeable about the equipment options and balancing energy costs and carbon footprint. I chose NUR because the handled aspects all of the job scope and accommodated my wishes for outdoor unit placing. The install crew was hard working. Happy to support Ukrainian Americans - Slava Ukraine!”
“Over the last 10 years, we have had issues with our furnace. Every time, I've call the same local service for help. This time, I called Nur HVAC instead. And I'm glad I did. The technician, Adlan, was knowledgeable, thorough, and made observations that I haven't heard before. He performed maintenance, calibrated the gas (which had never been done before), and fixed our issue (without replacing parts). He then evaluated the system by running tests on the furnace and the checked the thermostat and the vents inside the house. Our system is running better than it has ever run. I can't be happier with Nur's service.”
“Had a great experience getting a heat pump/AC unit installed in SF. High quality work, also handled all the inspection followups end to end.”
“Excellent experience. We requested a routine furnace inspection and were able to be scheduled the next day with Islam. Islam was incredibly professional, thorough, and efficient. He did not try to upsell us on any repairs, and he even took the time to successfully troubleshoot why our attic light wasn't working (saving us an expensive electrical visit later on). If we need repairs or replacement in the future, Nur HVAC will be the first company we seek out.”
“Excellent experience start to finish! Much better than my last experience on a different property with a competitor that failed inspection and left me high and dry. Five stars all the way! Cost competitive, great service and friendly people!!!”
“The team did a great job at a great price in a tough environment! Thank you.”
“Very competitive price. Very professional estimate and installation process.”
“Many thanks to NUR HVAC for their outstanding customer service and job done. Our central air conditioning unit broke at the most inconvenient time and they were able to move things along quickly to help us out. The Inspector came out to assess everything and was very helpful in explaining what we needed. Within a few days a new unit was scheduled for installation. Eldar and Ruslan were the installers, and the very best at that. They worked fast and efficiently, respecting our home, and keeping us informed as they worked step by step. The installers cleaned up the interior and exterior after work was completed and gave us very clear instructions on the controls and maintenance details. We would highly recommend NUR HVAC services. Thanks again.”
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