Redwood City’s HVAC experts

You’ll love our skilled technicians, friendly service, and straightforward pricing. Contact RC Mechanical for heating and a/c done right the first time.

    Our HVAC experts are here for all your heating and cooling needs

    furnace heating system


    We keep your furnace or heat pump running at peak performance and lengthen its life. When installing a new furnace, we make sure you get the right size, power, and ductwork for your house.

    air conditioning icon


    Whether it’s installing a/c for the first time or repairing an existing air conditioner, Redwood City homeowners count on us for all their air conditioning needs.

    energy efficiency icon


    Proper sizing, installation, and maintenance are key to furnace and air conditioner efficiency. Let our experts help you reduce your carbon footprint and your energy bill.

    The Peninsula’s favorite

    ★ ★ ★ ★ ★

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    Sal Contreras of RC Mechanical Inc.

    From the minute Sal steps inside your home, your family’s comfort and safety are his top priorities.

    Sal Contreras, a U.S. Army veteran, started RC Mechanical Inc. in Redwood City, California in 1992. Sal is a highly trained building-trade journeyman who has been doing sheet-metal work since high school and worked on helicopters in the service. Even with all this experience, Sal still makes time to take yearly training to keep up with industry advances and best practices. His immense attention to detail ensures you get top-notch results.

    RC Mechanical is veteran-owned business located in Redwood City, California, not part of a large franchise. When you work with RC Mechanical, you work with Sal and his team. Sal believes in spending extra time with you to ensure that all questions are answered and repairs are done correctly. When you work with Sal, you get expertise, integrity and the promise of a job done right the first time!


    veteran-owned business

    Sal Contreras veteran-owned HVAC business

    Sal in West Germany 1981

    The Latest Heating & Cooling News

    AC troubleshooting

    Air conditioner is a great invention that makes summer’s hot days bearable. It can be miserable when, on a hot day, the AC stops working. As your AC stops working, it gives signs that it needs to be maintained or is on the verge of breaking down. Here are a few signs that your air conditioning unit may not be working to its fullest and... read more >

    Tips for coping with a heat wave

    You’ve probably heard that July 2019 was the warmest month ever recorded on the planet. What if you don’t have air conditioning in your home? There are some tried-and-true techniques that you may already know about — taking a cold shower, going to an air-conditioned movie theatre, and installing ceiling fans. But there are some additional strategies you may never have thought of. Turn off... read more >

    Keep your AC running smoothly

    With the hot weather and stay-in-place orders in San Mateo County, many households are installing A/C systems. On hot days when your new AC runs constantly, there’s a chance its effectiveness could lower. Here are a few steps you can take to make sure your newly installed air conditioner works smoothly throughout the summer. Replace your AC filter frequently The job of an AC filter... read more >

    Energy saving tips for winter

    When the temperature goes down, the cost of operating your heating system goes up. Here are some ways you can lower the cost of keeping your home cozy. Keep your furnace well-maintained Regular maintenance to keep your furnace in good condition is important for both your furnace’s performance AND its energy efficiency. An additional benefit of good furnace maintenance is that it prolongs your heating... read more >

    7 ways to get the most from your air conditioner

    Regardless of whether your air conditioner is newly installed or in need of some maintenance after years of service, it’s best to use it to its maximum efficiency. Here are some easy, simple tips for how to save both energy and money when using your A/C: 1. Keep your home sealed and secure Cracks or openings in your door and window frames can both let... read more >

    All about heat pumps

    A conventional heating unit generates heat using gas and moves it into the house through the duct system to heat your home. Heat pumps, on the other hand, simply move heat from one area into another. This makes them very efficient to heat and cool your home. During the winter, heat pumps move the air from the outside, compresses it to increase the temperature of... read more >

    Prepare your home for the fire season

    Every year the fire season seems to start earlier and earlier. Fall is the fire season when hot weather, dry plant materials and gusty winds come together to create an atmosphere that is ripe for fire. During such burnings, the air fills with smoke and the sky takes on an apocalyptic hue. The smoke is filled with particulate matter that can get lodged deep in... read more >

    Why does my air conditioner need maintenance?

    Bay area peninsula can get really hot in the summer and fall. As the world gets warmer, the temperatures are getting higher earlier in the year. The last thing you want is to have your AC not work on a hot day. Regular maintenance work is key to keeping your investment (air conditioner) working at its peak. Here are a few reasons why doing maintenance... read more >