"We had a Guardian Air purifier installed in our furnace about 4 months ago. Up until then I had been sick with lung and sinus problems off and on for 3 years. Mr Dahl recommended this remedy. It has been amazing! (Reason for this review). I would recommend MyMrFixit and this piece of equipment to anyone who needs help with allergens or heat or air conditioning problems. " S . T from Lawton, OK on January 7th, 2016 (4 / 5)