Furnace Services
Heating systems using gas, electric, or oil combustion.
Furnaces generate heat through combustion (gas or oil) or electric resistance, distributing warm air through ductwork. Gas furnaces dominate the Bay Area market due to natural gas availability and efficiency. Modern high-efficiency furnaces extract more heat from combustion gases using secondary heat exchangers. Furnaces also house the blower that circulates air for AC when paired with central air conditioning.
How Furnaces Work
When the thermostat calls for heat, the furnace ignites its burners (gas) or activates heating elements (electric). Combustion gases pass through the heat exchanger, which transfers heat to circulated air. The blower pushes heated air through ductwork. Combustion exhaust vents outside through the flue. The cycle continues until the setpoint is reached.
Common Furnace Issues We Repair
Warning Signs
Your furnace may need service when you notice:
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Furnace Maintenance Tips
Efficiency Information
Furnace efficiency is measured in AFUE (Annual Fuel Utilization Efficiency). Standard efficiency furnaces are 80% AFUE. High-efficiency condensing furnaces reach 95-98% AFUE. Upgrading from an older 80% unit to 95% AFUE reduces gas usage significantly. Bay Area mild winters mean moderate heating costs, but efficiency still matters.
Expected Lifespan
Gas furnaces typically last 15-25 years with proper maintenance. Heat exchanger condition is the critical lifespan factor. Cracked heat exchangers are safety hazards requiring replacement. After 15 years, have heat exchangers inspected annually.
Bay Area Considerations
Bay Area homes use furnaces less than colder regions, which can extend lifespan but also means extended idle periods. Pre-season maintenance ensures systems work when needed. Coastal humidity can affect components. Many homes benefit from heat pumps as more efficient alternatives given the mild climate.
Furnace FAQ
How often should my furnace be serviced?
Annual maintenance is recommended, typically before the primary use season. Cooling equipment in spring, heating equipment in fall.
What is the typical lifespan of a furnace?
Gas furnaces typically last 15-25 years with proper maintenance. Heat exchanger condition is the critical lifespan factor. Cracked heat exchangers are safety hazards requiring replacement. After 15 years, have heat exchangers inspected annually.
How do I know if my furnace needs repair?
Your furnace may need service when you notice: Yellow or flickering pilot/burner flame. Furnace cycling on and off frequently. Cold spots or uneven heating.
Other Equipment We Service
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