In Glendale, hot summers and cool evenings can force HVAC systems to run longer than necessary—often because the building envelope is leaking air or lacks proper insulation. By improving insulation and sealing gaps, you reduce heat transfer and uncontrolled airflow, which lowers HVAC runtime, stabilizes indoor temperatures, and can extend equipment life. Start with the attic: it’s typically the biggest source of heat gain and loss. Upgrading to the right R-value insulation and ensuring even coverage over the ceiling plane can dramatically improve comfort. Next, seal air leaks before adding insulation—otherwise you may “insulate” moving air. Common leakage points include recessed lights, attic hatches, plumbing and electrical penetrations, and gaps around chimneys (use fire-rated materials where required). Don’t forget walls, floors over garages, and crawl spaces. Properly insulated rim joists and band boards reduce drafts and help prevent condensation. Windows and doors are another priority: use quality weatherstripping on operable parts and durable caulk on exterior joints to block hot air infiltration. Ductwork can be a hidden energy drain. Leaky ducts in attics or garages waste cooled or heated air and pull in dusty, hot air. Sealing ducts with mastic and checking insulation around them can improve airflow and reduce strain on the HVAC blower. For best results, schedule an energy audit or blower door test to pinpoint leakage. A tighter, well-insulated home means your HVAC can be sized correctly, cycle less, and maintain comfort more efficiently—especially important during Glendale’s peak temperature days.
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