HVAC Questions

Below you will find a few HVAC questions that we are frequently asked. If you do not find the answer your seek, please contact 9-1-1 Comfort Air here »

What does HVAC stand for?

HVAC (pronounced h-vack or spelled out) stands for Heating, Ventilating, and Air Conditioning. All three are closely related to maximizing your home or business’s thermal comfort, air quality, at reasonable installation, operation, and maintenance cost.

How often should I check my air filter?

We suggest you check your air filter monthly. If it is a disposable filter and it is dirty, just replace it instead of trying to clean it. Higher efficiency filters can last up to 3 months. In higher-use seasons, you may want to check your filter more frequently.

How often should I replace my air filter?

Filter replacement depends on the quality of your filter. Cheaper filters usually need to be replaced every 30 days, while higher priced, energy efficient filters can last up to 6 months. As a general rule of thumb, you should probably replace your filter every 90 days.

What is the proper indoor humidity level?

The optimal range for indoor humidity should be between 30% to 40%. Above 40%, condensation can occur on your windows, and higher humidity can cause dust mites, mold, and other allergens to proliferate in your home.

How to heating and air conditioning systems move air through my home?

A fan draws indoor air in through vents called return grills located throughout your home. The air travels through ducts that run to your systems’ air handler, where it is returned into the conditioned space through supply vents or registers in your wall, ceilings or floors.

How do I re-light my pilot light?

Pilot lights do go out occasionally, but if yours goes out more than once a season that could indicate a problem. You can relight your pilot light if the gas goes out or your run out of propane, but if there are one of the following indicators, you will need a professional fix:

  • Bad or loose thermocouple
  • Bad gas valve
  • Poor pilot flame – low gas pressure or blocked orifice
  • High winds or downdraft
  • Badly cracked heat exchanger
  • Improper venting; flue or chimney problems

Pilot Light Instruction Guide:

(Always follow instructions on the appliance before anything else.)

  1. Turn off furnace, boiler, or water heater at thermostat or power switch.
  2. Locate the gas valve and turn knob from on or off (depending where it was) to pilot position.
  3. Hold down red button, which sends gas to the pilot burner.
  4. At the same time hold match to pilot burner. (Just follow the small pilot tubing to end.) Sometimes a long match is needed, you can use needle nose pliers to hold match.
  5. On some equipment, you may need to move a small metal door or panel for access.
  6. Light the pilot but do not let go of button.
  7. Continue holding button for 60 seconds.
  8. Now let go of button, pilot should stay lit.
  9. If not, you need to call for service.
  10. Turn gas valve knob back to the on position.
  11. Turn on appliance, turn up thermostat, main gas should light.
  12. Remember to put back metal cover if your system had one.