Custom Insulation

Before you hire Custom Insulation

In California, HVAC contractors are licensed through the California Contractors State License Board (CSLB). Ask Custom Insulation for its license number and check that it is active and in the business's name on the board's website. Look up the license

• The typical home in El Cajon was built in 1974.
• When replacing a furnace or air conditioner in a home built around 1974, ask for a load calculation (ACCA Manual J) instead of matching the old unit's size: insulation, windows and duct condition change over the decades, and a correctly sized system runs more efficiently.
• With both heating and cooling seasons in El Cajon, a heat pump, which does both, can replace a separate furnace and air conditioner; compare its SEER2 and HSPF2 ratings.

Local data for HVAC contractors in El Cajon · Licensing boards by state · Which jobs need a permit

Sources: state licensing boards, U.S. Census Bureau (ACS) and NOAA climate normals, as shown on the city page.

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