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Residential Heating, Ventilation, & Cooling Services

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Heating & Furnace Service

Lennox home furnace installation

Furnace Repair, Installation, Replacement, & Maintenance

When the weather starts cooling down, it's nice to be able to take the chill out of the air and keep it at a comfortable temperature. But, when your central furnace isn't working right - or has failed outright, the temperature inside your home can become noticeably cold right away. A simple space heater may help out temporarily, but it's certainly no substitute for a working central heater. I know that you need your furnace unit working properly again. I can help...

Art's Heating & Cooling is rated one of the top heating and cooling contractor services in Alameda County and Contra Costa County.. Whether you need an furnace inspection, furnace repair, furnace maintenance, furnace replacement, or a brand new furnace installation, you can count on me being your experienced, professional, & proven HVAC service technician for the job.

Heating Contractor

My name is David Ghahramany (Gah-hra-many), and I truly value my customers. My laser-focused aim is to provide top quality service for your home heating system. I believe that informed homeowners make the best decisions. So, I endeavor to clearly explain my findings, as well as the discuss the options you have. Please know that I never recommend things that you simply don't need.

Join with numerous other homeowners who've chosen Art's Heating & Cooling for their local HVAC services, including heater & furnace repair, installation, inspection, replacement, and maintenance needs. Take comfort in knowing that I am fully licensed & bonded and have hundreds of reviews on HomeAdvisor, Yelp, and Google

Certified furnace technician David Ghahramany of Art's Heating & Cooling.

Lennox Authorized Dealer

A lot of homeowners choose the Lennox brand of furnace equipment because it's well known for high quality and outstanding durability.

Art's Heating & Cooling is proud to be your local authorized sales & service dealer for Lennox Heating & Cooling HVAC Systems.

David Ghahramany repairing a gas furnace. (image provided by furnace repair San Jose CA)

I Service All Brands of HVAC Equipment

Besides being a local Lennox authorized service provider, Art's Heating & Cooling services ALL other brands of air conditioning & heating equipment, including from companies like Amana, American Standard, Bryant, Carrier, Coleman, Goodman, RUUD, Rheem, Trane, Day & Night, Nordyne, Gibson, Payne, Heil, Westinghouse, Tempstar, Arcoaire, and more.


California State License Board: Lic. 977736

Contractor's Bond: Bond Number 100298536


7 AM - 7 PM, Monday - Saturday | Closed, Sunday

For the fastest service

How a Furnace Works (Video)

How a Gas Furnace Operates

The home thermostat controls the temperature in your home. In the case of heating, the furnace responds to the temperature falling below the temperature set in your thermostat. An electric fan pulls fresh air into the heating equipment. Since it's being drawn through your furnace's air filter, it should be clean particles. As the air is being drawn in to the furnace, an electronic ignitor informs the furnace that warm air is required. So, the burner ignites and heats the air flowing "through" the heat exchanger. This air is exhausted through the flue to the outside of the home because it has combustion particles in it. However, the air flowing "past" the heat exchanger is warmed and sent through the ventilation ductwork into the rooms of the home. When the thermostat detects that the temperature has risen to the temperature set, the furnace turns off.

The 4 types of furnaces:

The gas furnaces of today can achieve up to 98% fuel efficiency - meaning very little gas is wasted.


Dual Fuel

The 4 components in a gas furnace:

The Burner - The compressor is located immediately next to the condenser. The compressor is a pump that moves refrigerant between the evaporator and the condenser to chill the indoor air.

The Heat Exchanger - A fan blows air over the condenser to dissipate heat outside.

Ductwork - The air filter is located in or near the interior air conditioning unit, and it's job is to remove particles from the air.

Vent Pipes or Flue - The thermostat is a temperature control system who's job it is to regulate the amount of cool air that is distributed throughout the home.

What others are saying about Art's Heating & Cooling...

Art’s heating and cooling is an honest company. David gave me his best recommendation with a fair price and he finished the job on time and as promised.

Domarina A.

Google Review

David is very professional, knowledgeable, friendly, honest and quick to’s easy to see that he is a very honest person. His pricing is very reasonable as well.

Rona J.

Google Review

David Has been one of my go to person...He actually cares about his client and explain the issue and find the fastest resolution. I would recommend him to all of my friends, families as well as to my clients.

JGI Agent

Google Review

Service Area

  • Alameda County
  • Contra Costa County

Alameda County:

Asco, Dublin CA (94568), Dougherty, Livermore CA (94550, 94551), Pleasanton CA (94566, 94568, 94588), and Ruby Hill Country Club.

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