Heating, Plumbing & Air Conditioning in Contra Costa County Since 1974

Furnace Replacement in Walnut Creek, CA

When replacing your current heating system in Walnut Creek, CA you have two major decisions to make. The first is choosing the right contractor. Turn to a company like Stewart Heating, Plumbing & Air Conditioning, providing air conditioning and heating solutions to Walnut Creek. We will perform Manual J calculations to evaluate your home’s heating and cooling needs to ensure proper sizing of your new HVAC system. We take the necessary steps to ensure your furnace is installed correctly while standing behind our work.

When you call Stewart Heating, Plumbing & Air Conditioning, you get expertise on the full range of central heating options in Walnut Creek for your home – not just some of them. From gas or gas powered central heating, to central comfort systems that combine air conditioning for summer, and heat pump installations – Stewart Heating, Plumbing & Air Conditioning can help you choose the perfect HVAC system in Walnut Creek for your family and your budget.

It is important to have your home’s heating needs assessed by the professionals from Stewart Heating, Plumbing & Air Conditioning. That advice can help ensure that your new system provides you with a comfortable even temperature, as well as better control of how your home is heated. Quality planning and installation is critical to a system that will last year after year – an underrated system would always be working at full capacity, while an overrated system would have to cycle on and off – causing reliability issues and poor heating. That’s why Stewart’s input is so important in helping you choose the right system.

Heating Replacement

If you’ve had to repair your heating system multiple times or if it’s been under consistent use for many years, it might be time to replace it. Stewart Heating, Plumbing & Air Conditioning can replace your old heating system with an environmentally friendly, energy-efficient unit. Our heating systems will help you save on your monthly energy bills and keep your home comfortable.

Get the Right Size Furnace to Save the Most Money

In most homes, the heating and cooling system installed is too big. Besides wasting energy, improper size can create uneven temperatures, poor humidity control and costly maintenance problems over time.

Improper furnace installation in Walnut Creek can reduce system efficiency by up to 30%. But properly sized ENERGY STAR® qualified equipment can easily cut your annual energy bill by hundreds of dollars. Programmable thermostats, like the YORK® Affinity™ Residential Communicating Control, can save you even more with improved energy savings, home comfort and peace of mind that your equipment is operating at peak efficiency.

Ask Stewart Heating, Plumbing & Air Conditioning about high-efficiency residential products with the ENERGY STAR® label.

Donald P.
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My furnace was on the fritz, so I contacted Stewart Heating and Air. This was my second time doing business with them and once again, their service far exceeded my expectations. Angelica, Kathy--- and especially Christina--in Customer Service were superb. Communications were thorough, accurate and timely. Don the Service Technician showed up on time, was personable and professional, quickly diagnosed the problem, and ordered a replacement part which arrived the next day. Kathy in Customer Service squeezed me in for an appointment the following day to have the part installed even though their schedule was full. Bravo for that extraordinary feat! Don came back and expertly returned my furnace to perfect working order in no time at all. He was cheerful, helpful, and gave me a very reasonable price. Invoices were promptly emailed to me including my applicable $40 off coupon. Truly 5 star service with excellent value from every single member of the staff. My congratulations to Bill Stewart for hiring exemplary employees who clearly take pride in their work. I am sold and will definitely invite you back!


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Furnace Replacement