San Rafael

(415) 942-6565

Santa Rosa

(707) 452-3464

John Owens Services is a reputable HVAC company near you in Novato. We are committed to helping families get the most out of their HVACs. We are your go-to team for HVAC installation, maintenance and repair. Whether you are facing a common HVAC issue or grappling with a complex problem, our team can help.

We’ve compiled a list of some of the most frequently asked questions about HVACs.

How Often Should I Maintain My HVAC? 

Like every other household equipment, the HVAC requires ongoing maintenance. Periodic maintenance reveals current and potential problems and adds years to the service life of the unit. A well-maintained unit operates reliably for years and needs less frequent repairs. Have your technician inspect and maintain your unit at least twice every year (once before the heating season and then again before the cooling season).

How to Tell If I Need a New HVAC?

Here are some signs you need a new HVAC:

  • Your HVAC is on its last legs (15 years or older)
  • It needs frequent repairs
  • High electricity bill
  • You hear weird noises and notice unusual odors coming from your HVAC
  • Repair costs exceed 50 percent of the price of a new system
  • Poor indoor air quality

How Can I Lower My Cooling Costs?

Here are some simple ways to lower your cooling costs:

  • Maintain your HVAC regularly
  • Install a programmable thermostat. Do not place your thermostat close to a heat source or in a room that receives direct sunlight
  • If possible, avoid cooking indoors
  • Use heat-emitting appliances such as televisions, laptops and tablets sparingly during the day
  • Upgrade your windows
  • Use ceiling and portable fans to get the air moving
  • Keep blinds and curtains closed during the heat of the day. Leave your windows open at night
  • Plant shade trees around your house
  • Seal off any leaks

What Size HVAC Unit Do I Need?

To answer this question, we will have to do a Manual J Load calculation. The calculation is done to determine the amount of heating and cooling loads of a home or building. Some factors to consider when doing a Manual J Load calculation are the type and number of windows and their placement, number of occupants, number of exterior doors, and material type and location.

Whether your AC is acting up or your water heater is not heating properly, John Owens Services Inc can help. We treat problems at the root level. To learn more, call 415-322-7542.

Need Help?

We’re open Monday – Friday 7:30am – 5:30pm, call today or schedule online now!

Serving Marin & Sonoma Counties

Good plumbing, heating, and air conditioning systems are vital in every North California home. John Owens Services, Inc. is proud to be the expert plumbing company you can count on

The John Owens Way

Our philosophy is simple, we always want to maintain equipment to give it the longest life possible. Next, we want to focus on repairing when something goes wrong. Then only as the last choice, we replace equipment when needed. That’s the John Owens Way.

San Rafael
(415) 942-6565
Santa Rosa
(707) 452-3464



Regular maintenance keeps your home’s systems running well all year long. We’ll help you gain efficiency and save money.



When something breaks down, our team will get to you fast. We’ll find the problem and fix it to get you back to normal.



When it’s time to replace something in your home, we’ll help you get a top quality product that matches your specific needs.
San Rafael
(415) 942-6565
Santa Rosa
(707) 452-3464