Ask Angie: Air-conditioning unit should be cleaned once a year - Bellingham Herald

Ask Angie: Air-conditioning unit should be cleaned once a year Bellingham Herald Many heating and cooling companies offer low-priced preventative maintenance inspections � costing on average between $60 and $100 � in which they'll clean your HVAC unit and replace your air filter. Some companies even offer discounts if you sign ... and more »

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