HVAC & Dryer Vent cleaning is necessary because an HVAC system works by having the return suck air into the system and recirculating it. Dust and dirt are being produced and trapped in your system regularly, for instance during construction or remodeling projects, sanding drywall or hardwood floors can create a huge amount of dust/debris. The dust gets sucked into the return air vent and eventually ends up in the HVAC system. The return air filter that is placed in the system is meant to trap that dust and prevent it from coming into your HVAC system but most of that dust usually finds its way into your system and keeps recirculating.
