“I've always bought this filter from plumbingsupplyandmore without issue. I'm tempted to try a knock-off since they are substantially cheaper in price but not sure of the quality.”
“Our furnace/AC specifies this filter and it only needs to be replaced once a year. So the cost is about the same as a 4 pack of high quality 1" filters which need replacement every 2-3 months. Annual maintenance shows it does a good job of keeping the HVAC components clean, as it does for the air quality in the house.”
“It's worth the upgrade. My house smelled better nearly instantly. Next time I'll upgrade to the 416+ to see if I can tell a difference for any of us due to the better allergen filtration.”
