RCMechanical HVAC

Redwood City’s HVAC experts

Skilled & friendly technicians plus straightforward pricing. Contact us for heating and a/c done right.



    ★ ★ ★ ★ ★

    “I give Sal my highest recommendation. He works hard, finishes on time, explains everything, and REALLY, REALLY cares about doing a quality job.” — Melissa, Sunnyvale

    MEET SAL CONTRERAS, HEATING AND AC SPECIALIST

    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 worked sheet-metal since high school and worked on helicopters in the army. Even with all this experience, Sal still makes time to take yearly training on latest industry advances. 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 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

    Authorized Installer

    Powerful, silent air purification that integrates seamlessly with your existing HVAC system for exceptional medical-grade air quality throughout your home. Perfect for those with sensitivies or health issues. Learn more >>

    ★ ★ ★ ★ ★

    “We unconditionally recommend you to anyone needing heating or cooling system services. You were always clear as to what we could expect in terms of work and cost and went the extra mile to deal with the unique conditions in our older house.” — Tom & Linda, Foster City

    Choosing the Right Heating System for Your Home

    Selecting the best heating system for your home is an important decision that impacts your comfort, energy costs, and long-term efficiency. With various options available, it’s essential to consider factors like home size, climate, celing height, existing infrastructure, and energy preferences. Whether you’re looking for a gas or electric furnace, heat pump, or another heating solution, understanding the pros and cons of each system can... read more >

    Transform Your Home Comfort with Smart Temperature Zoning and Sensors

    Home thermostats regulate HVAC systems to maintain a comfortable temperature, but fixed wall placement can limit flexibility. While some homes use multiple thermostats to create different zones, a single thermostat with temperature sensors in key rooms can achieve effective multi-zone heating and cooling, optimizing both comfort and energy efficiency. For instance, if your hallway thermostat is set to 68 degrees, it shuts off the HVAC... read more >

    Simple test to see if your AC is working

    HVAC is probably the biggest energy drain in any house. This leads to a higher energy bill every month when the furnace or the AC is used a lot. Keeping your heating and cooling systems running efficiently is a good way to keep the energy costs down. Efficiency going down can also be an indication of larger issues. Such issues if left alone could end... read more >

    Replace gas furnace with an electric one

    Gas furnaces are the most common way to heat your home in the US. Gas is cheap and is available in abundant supply. Gas is considered clean energy because burning gas emits very few pollutants. In spite of these wonderful advantages, gas is still a fossil fuel. So extraction, processing, and transportation of it takes money and resources. This also makes it a non-renewable resource.... read more >

    ★ ★ ★ ★ ★

    “Sal is our go-to guy. He knows what he is doing, is honest and fair, and doesn’t try to sell you anything you don’t need. He has our complete vote of confidence!” — Virginia, Palo Alto