Here’s a furnace replacement in San Carlos that we paired with duct sealing for noticeably more even heat.
This San Carlos project paired a furnace replacement with proper duct sealing, so the home gets both a reliable new heater and ductwork that actually delivers the warm air where it belongs. Leaky duct connections waste a surprising amount of heat, so we addressed both at once.
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We removed the old furnace, installed the new unit, and sealed the plenum and duct takeoffs with mastic — you can see the clean grey sealing in the photos. Then the whole system was tested to confirm steady airflow and safe operation.
Why sealing the ducts matters as much as the furnace
- Less wasted heat — sealed connections keep warm air inside the ducts instead of leaking into the crawlspace.
- More even comfort — rooms that used to run cold get their fair share of airflow.
- Lower bills — the furnace doesn’t have to work as hard to reach the set temperature.
- Cleaner air path — sealed ducts pull in less dust and debris from unconditioned spaces.
Pairing a new furnace with duct sealing is one of the best value upgrades we do, and it’s easy to miss if you only replace the unit itself. We finished this San Carlos furnace installation with sealed ducting and a full performance check. If some rooms never seem to warm up, your ducts may be the real culprit.
By sealing the duct connections at the same time as the furnace swap, this San Carlos home keeps far more of its heated air instead of losing it into the attic. That means rooms warm up faster, the system works less, and comfort stays even from one end of the house to the other.
Frequently asked questions
Do I really need duct sealing with a new furnace?
If your ducts are old or leaky, sealing them lets the new furnace deliver its full output — otherwise you lose efficiency to leaks.
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Reviews
Trusted by your neighbors
“NUR HVAC provides great service and value. We reached out to them on 2 occasions: new furnace installation and duct replacement. They were friendly, got the job done on time, left the place clean, and the price was right. They are our go-to Hvac resource. Highly recommended!”
“A quick note to thank Nur, and especially Misha (Mikhail Potapov) for a rapid diagnosis and initial triage of our Carrier 58MVP080 series furnace : and a blower motor not working/ Misha came and was extremely courteous and professional: fast and competent: I am an electrical engineer (only be education) and so it was great to see one by Profession. Fast and precise diagnosis, detachment, and prop of the unit for repair. The replacement is TBD but awaiting the estimate and next steps.”
“David and his team did great job in processing HOA approval, inspection, installation and HVAC heat pump rebate even helping Tax deduction.”
Google Reviews
What our customers say on Google
“We installed a heat pump recently to be able to have AC and to replace an old furnace. Reached out to a few HVAC contractors and decided to go with NUR to install a Mitsubishi heat pump. David was our first point of contact and one of the main reasons we chose NUR. When he came to visit and provide an initial estimate, he explained the different options available and what to consider for each one, from duel fuel options to heat pumps. He was not pushy and was very patient with our questions. Afterwards, he provided a few quotes for us and answered questions via email and phone promptly. When it came to the installation, his team (Artur, Ilias, and others) was great as well; they were all very respectful and took great care in making sure the install was done properly. The install took 3 days and David came to check in towards the end of the install to make sure everything was working properly and things were cleaned up. NUR helped schedule the HERS test and city inspection afterwards. Overall, a fantastic experience. I would highly recommend working with NUR for any HVAC needs!”
“⭐⭐⭐⭐⭐ Highly recommend Nur HVAC company. My heater went down and the first company I called quoted me $5,000 to fix it — which immediately felt excessive. I brought these guys in for a second opinion and I’m very glad I did. The technician was friendly, professional, and clearly knew what he was doing. He quickly diagnosed the issue, explained the options clearly, and quoted only a few hundred dollars for the repair. Even better, they handled the warranty part replacement for me, which made the whole process painless. Honest pricing, knowledgeable techs, and zero pressure. This is exactly how service should be. I’ll absolutely be using them again and recommending them to others.”
“Very knowledgeable technician, showed up on time and made some excellent recommendations. Service charge is also very fair compared to others. Update: 1/21/2025, we had our warehouse furnace installed today. Two technicians showed up and did an excellent job removing the old furnace and installing the new one. Also installing a thermostat, works great and everyone is warm and Happy! Quality Service at a fair price. Thank You!”
“Adlan from NUR, is extremely knowledgeable and punctual. They just installed our new furnace for our small building. I could not be happier with the quality of work performed or the competitive price they offered. Look no further and use NUR for ANY HVAC work for home or business!”
“Alexey from NUR HVAC was a total pro! He was friendly and clearly communicated the repair plan (schedule, likely costs) as my Carrier HVAC circuit board was damaged but replaced under warranty. And when Carrier/brand mixed up and sent the wrong part, he quickly got them to resend and rushed down that same day to install it. Highly recommend NUR and Alexey!”
“The people at NUR did a fabulous job installing a new heat pump, and at a very competitive price. The crew was communicative, on-time, and very professional. About a year later we're very much enjoying our (still) new heating/cooling system!”
“Nur HVAC found an economical way to repair my AC system for another 3-5 years of use when others quoted me $9k+ minimum to repair and then tried to sell me a $20k full replacement. The Nur tech was the most honest and understandable person I encountered. He explained things well and gave me options. Their price for the full replacement was the best too, although I didn’t go that route. The Nur repair was done on time, with excellent quality, and on budget. I strongly recommend Nur HVAC for HVAC repair or purchase and installation.”
“Alexey is very thorough, knowledgeable and kind. He communicates with you throughout the process and follows up to ensure all is well.”
“We have used NUR HVAC for maintenance and repair multiple times over the years. The receptionist is friendly and dispatches technician timely whenever possible. Islam, the technician who worked with us in the past two years, is always on time for the scheduled appointment, technically competent and also very friendly and patient when answering my questions related to our 2 HVAC systems. Thank you Islam! We will definitely continue to use NUR HVAC’s service.”
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