Clairemont, San Diego, CA Furnace Replacement
Request a Quote for Your Furnace Replacement in Clairemont
If your furnace has stopped working or yours is older and keeps breaking down, Guthrie & Sons Heating, Air & Solar can help you get a new one you can count on. We’ll go over your options, give you honest pricing, and get it installed quickly so you can warm the place back up. Reach out today for a quote on your furnace replacement in Clairemont, San Diego.
A New Furnace From Guthrie & Sons Means a Warmer, More Comfortable Home
Even in sunny San Diego, Clairemont cools off fast once the sun goes down. Temperatures in the 40s don’t sound bad until you’re feeling it inside your home, and that’s when a working furnace really matters. If yours has stopped keeping up, Guthrie & Sons Heating, Air & Solar is a local furnace company in San Diego, California, that provides residential and commercial furnace replacement services in Clairemont. We’re a family-owned business that’s watched the Clairemont community grow over the years, and we’ve worked on several properties in this area.
You deserve a service experience that’s straightforward, reliable, and focused on what actually matters—not one that feels rushed or full of upsells. We install trusted furnace brands like Daikin and Rheem, and we’ll be here to maintain and service your system for the next decade and beyond. Call or send us a message today to talk about your Clairemont furnace replacement.
Honest Pricing, Real Service—That’s How We Do Furnace Replacements
Replacing a furnace can feel stressful—you’re trying to make the right call without getting blindsided by costs or pressure. At Guthrie & Sons, we keep it simple. We give you clear pricing and explain your options so you can make an informed decision. This is your home and the system that you’ll use for years. With us, you’ll have access to:
- Free in-home estimates so you know your costs upfront
- An easy online quote tool for quick, no-pressure estimates from home
- Seasonal specials and limited-time offers to help you save more money
- Financing options that make upgrading more manageable on your budget
You deserve to feel confident about the work being done in your home and who’s doing it. We’ll make sure you understand what you’re paying for, what your options are, and that the job’s going to be done right.
Searching for a Furnace Replacement Near Me? We’re Right Here in Clairemont
If you're looking for a furnace replacement quote near me, Guthrie & Sons can get you one right away. We know this mesa inside and out. We’ve worked on the classic mid-century ranch houses of the area, the duplexes, and the many townhomes and condos that define Clairemont Mesa.
You can count on our experts for fast furnace replacement services in North Clairemont, Clairement Mesa East, and Clairemont Mesa West. We also serve Bay Park and Bay Ho, along with homes and businesses near San Diego Mesa College and out by Marian Bear Memorial Park. For the furnace replacement Clairemont, San Diego, CA, trusts, choose Guthrie & Sons.
What Happens During Your Clairemont, San Diego Furnace Replacement
For many homeowners, replacing a furnace isn’t something you do often—it might even be a first. Others have gone through it before, either in the same home or a previous one. No matter where you fall, our top priorities are always your safety and the performance of your equipment. Every installation we complete meets our own high standards, along with all manufacturer requirements and local San Diego building codes. Here’s what you can expect from our Clairemont furnace replacement services:
Home Visit and System Check
It starts with a visit to your home so we can see what you’re working with. Your technician will inspect the current furnace, ductwork, gas or electric connections, and ventilation setup. We also take measurements to make sure your new furnace is the right size. That matters so much—if your furnace is too small, it will run constantly and still struggle to keep up; too big, and it will turn on and off too often, wearing out faster and wasting energy. It’s not uncommon to see the wrong-size furnace originally installed. If you’ve renovated your home, you may need a larger heating system as well.
Removing the Old Furnace
Once everything’s ready, we disconnect and remove the old furnace carefully. That means turning off the power and gas, sealing lines, and keeping your home protected while we work. If the venting or duct connections are worn or outdated, we take care of those before installing the new unit so everything meets code and safety standards.
Preparing for the New Installation
Before your new furnace goes in, we prep the space to make sure it’s a perfect fit. That might include updating the stand, adjusting ducts, or upgrading vent materials. In older Clairemont homes—especially those with furnaces tucked into closets or tight attics—we make sure there’s enough clearance for safe airflow and easy maintenance access.
Installing the New Furnace
Your new furnace is then set in place, leveled, and connected to your home’s gas line, power supply, and duct system. Every connection is double-checked for leaks, and we make sure all venting is properly sealed. Everything is installed to manufacturer and city requirements so your warranty stays valid and your system runs safely.
Testing and Adjusting for Performance
Once the system’s installed, we run your furnace through several heating cycles, check temperature rise, balance airflow, and calibrate the thermostat. These adjustments make sure your furnace runs efficiently and keeps every part of your home comfortable without hot or cold spots.
Walkthrough and Support After Installation
Before we wrap up, your technician will walk you through how to use your new furnace—how to adjust the thermostat, when to change filters, and what to expect during your first few months of operation. We’ll also go over your warranty information and our own labor coverage, so you know exactly who to call if you ever need help or have a question down the road.
When you’re deciding on the best furnace to buy, we’ll walk you through what really matters, which are things like energy efficiency and Energy Star certification. We’ll also explain variable-speed motors, which adjust airflow automatically so they’re not always on full blast, and talk about your smart thermostat compatibility.
If you’re considering other options, we can also share more about how a heat pump installation can benefit you. These systems are so highly recommended because they use far less energy than a traditional furnace and can handle both your heating and cooling in one system.
Make Your Furnace Last with Regular Care and Our Membership Plan
Once your new furnace is installed, you’re going to want to protect it. As it starts to rack up some miles—and a little dust—keeping up with regular furnace maintenance makes all the difference. That means scheduling a furnace repair the moment you notice something off and booking a yearly furnace tune-up so we can clean, test, and fine-tune everything before winter. A furnace repair every now and then is completely normal as a system ages, but the frequent repairs you may have been dealing with are not. This is just proof that a furnace replacement is worth it.
We’re always looking out for our customers, which is why we created the USA Membership Plan. It keeps your maintenance on track automatically, with reminders, priority scheduling, discounted repairs, and lower service fees available as perks. You can learn more from your technician or give us a call with any questions!
Frequently Asked Questions
How long does a furnace typically last?
Most furnaces here last about 15 to 20 years, depending on how often they’re used and how well they’re maintained. Systems that get yearly tune-ups tend to run cleaner and last longer because small issues are caught before they cause major wear. In milder climates like ours, a well-installed furnace can often stay efficient for two decades or more.
How to choose the right size furnace for a home?
Furnace size is measured in BTUs (British Thermal Units). A smaller home around 1,200 square feet might need a 40,000–60,000 BTU furnace, while a larger 2,000-square-foot home could need something closer to 80,000–100,000 BTUs. We use a process called a Manual J load calculation, which factors in your home’s size, insulation level, window placement, and duct layout. This ensures your furnace is powerful enough to heat your home without wasting energy or straining the system.
What are the maintenance requirements for a new furnace?
Even a brand-new furnace needs routine care. A yearly professional tune-up helps keep parts clean, ensures safe operation, and maintains efficiency. You should also replace or clean air filters every one to three months.
What are the energy efficiency ratings for furnaces?
Furnace efficiency is measured by AFUE (Annual Fuel Utilization Efficiency), which shows how much fuel is turned into usable heat. For example, a 95% AFUE furnace converts 95% of the fuel it burns into heat for your home, losing only 5% through exhaust. Higher ratings mean lower energy bills and better long-term savings.
Heating and Cooling Offers You Can't Miss
Big savings, same great service. See what offers are available now in Carlsbad for our favorite customers.
- INSTALLATION
Up to $1,500 Off a New System
Receive up to $750 in manufacturer rebates and up to $750 discount from Guthrie. Valid on select systems. Must mention promotion at time of estimate appointment. Not valid on prior sales. Cannot be combined with any other offers. Restrictions apply. See dealer for details. Offer expires 7/31/2026.
- INSTALLATION
0% APR for 24 Months
Get 0% APR financing for 24 months on a new heating or air conditioning installation. 0% interest with 24 equal monthly payments.
Financing subject to credit approval. Valid on select systems only. Valid on residential properties only. Cannot combine with other offers. Must mention promo at time of estimate appointment. Restrictions apply. See dealer for details. Offer valid for an estimate appointment scheduled before 7/31/2026.
- REPAIR
Free Diagnostic w/ a Repair
Your diagnostic service call fee will be waived if you proceed with a repair.
Cannot combine with other offers. Restrictions apply. See dealer for details. Offer expires 7/31/2026.
- WATER HEATER
Free Estimate on a New Heat Pump Water Heater Installation
Valid for an estimate for a new hybrid heat pump water heater installation or replacement.
Restrictions apply. See dealer for details. Offer expires 7/31/2026.
Real Reviews From Real Customers
We do things differently, and our customers appreciate it. See what some of our thousands of satisfied customers have to say about working with us.

As far as price goes, I paid a higher flat fee 12 years ago from one of the larger local companies. I'm very impressed with pricing and quality of work.
I highly recommend Guthrie & Sons and Rob.


Christian and his crew did a great job on the install everything was smooth from start to finish.
I would definitely recommend this company here in Murrieta.




Please congratulate them for a job well done!





We worked with Vlad T., who had previously been out to our home and saved us tens of thousands of dollars by getting our existing AC unit up and running when other companies were pushing for a full replacement. That experience alone earned our trust.
Now that we’re finally ready to purchase new units, there was no question that Guthrie & Sons was the only company we would consider, and Vlad was the obvious choice. He was extremely professional, punctual, and exceptionally knowledgeable, taking the time to explain options clearly and thoroughly. His expertise and honesty made the entire process straightforward and stress-free.
If you’re looking for an HVAC company you can truly trust—one that values integrity, quality workmanship, and customer service—I cannot recommend Guthrie & Sons and Vlad T. highly enough. This is how service should be done.




I only wish the annual service was cheaper 🙂




Zach M. came by and installed on new one. He was extremely professional and completed the installation promptly.
This was another great experience all around and I gladly recommend Guthrie and Son's for all your HVAC needs.
Talk to Us About Your Clairemont Furnace Replacement
Your home needs a good heating system—end of story. Blankets and space heaters aren’t a solution when the temperature drops, and running a failing furnace is just asking for trouble. The same goes for hiring someone who isn’t qualified to install it correctly. Our licensed and insured technicians include Nate-certified professionals who are tested to be among the best in the industry. We have experience in spades and some of the nicest people you’ll ever meet! We’re here to help you enjoy a safe, warm home. Contact us about your furnace replacement in Clairemont, San Diego, CA, today.
