South Lake Tahoe's harsh winter conditions can take a serious toll on HVAC systems, especially when insulation deteriorates and allows cold air to compromise ductwork efficiency. Our team responded to a potential carbon monoxide concern at this residential property, where inspection revealed damaged insulation wrapped around garage-mounted furnace ductwork. The deterioration showed dark areas indicating possible moisture infiltration and degradation that could affect both system performance and safety. After a thorough inspection of the entire HVAC system, we checked the compromised insulation areas and verified proper ventilation to rule out CO hazards. Call Now to schedule a complete system safety check. Riley Heating Plumbing And Air recommends annual inspections before winter settles in. High-altitude conditions accelerate insulation breakdown and can create serious safety risks if left unaddressed.