Santa Ana winds funnel through the San Gorgonio Pass and dump dust across Riverside from October through March. These dry, warm winds carry particulates from the desert floor and deposit them throughout the basin. Homes near Mount Rubidoux and the Arlington Heights area experience heavier dust accumulation during wind events. Your HVAC filter traps this airborne debris before it enters your ductwork, but saturation happens faster than in coastal cities. A filter that lasts three months in San Diego needs replacement every four to six weeks here. Ignoring this accelerated saturation reduces system efficiency and increases energy costs.
Riverside's building stock includes many mid-century homes with original ductwork and undersized return air plenums. These systems require careful filter selection to avoid static pressure problems. Using a high-MERV filter in a system designed for low-resistance media can starve the blower motor and trigger safety shutoffs. Horizon HVAC Riverside understands these older systems because we have serviced them for years. We match filter specifications to your equipment capacity, not generic recommendations. This local knowledge prevents damage and ensures your system operates as designed, even in homes built before modern efficiency standards.