Best Filter Delivery in Phoenix AZ

Day & Night contacted me to remind me of my free maintenance check for purchasing a new unit from them. Thought this would be a quick 15 minute check since it was free - but no. Appeared to have been a very thorough check. Ronnie, my service tech, had been here about a year ago checking the original install. In addition to the check today, he did some adjusting to make it easier for me to change the filter. Very pleased with the service.