On arrival technician performed a seasonal heating safety inspection. Technician tested all the safeties, all safeties working properly at this time. The technician checked the air filter, the 20 x 25 x 4 air filter is clogged and needs to be replaced. The technician gave customer pricing on returning with air filter or returning to install air filter. The technician checked over the blower motor, lower motor is clean at this time. The technician checked over the Reme halo, Reme halo is working properly at this time. System working properly at this time.