Product review (5 stars): Change these often
Perfect fit replacement panel for many residential HVAC humidifiers. Installation was easy and LONG overdue at our new (to us) house. Last owners probably NEVER replaced the original as it crumbled into a huge, stinky mess when it was removed. It is nice to be able to get these parts as a consumer because changing the filter is easy and does not require paying a HVAC professional to have it taken care of annually for healthier air quality. Worked in our "Trane" branded furnace humidifier unit.