![Aprilaire 600 Whole Home Humidifier, Automatic High Output Furnace Humidifier, Large Capacity Whole House Humidifier for Homes up to 4,000 Sq. Ft. : Amazon.ca: Home Aprilaire 600 Whole Home Humidifier, Automatic High Output Furnace Humidifier, Large Capacity Whole House Humidifier for Homes up to 4,000 Sq. Ft. : Amazon.ca: Home](https://m.media-amazon.com/images/I/813-miqqMWL._AC_UF350,350_QL80_.jpg)
Aprilaire 600 Whole Home Humidifier, Automatic High Output Furnace Humidifier, Large Capacity Whole House Humidifier for Homes up to 4,000 Sq. Ft. : Amazon.ca: Home
![Aprilaire 500 Whole Home Humidifier, Automatic Compact Furnace Humidifier, Large Capacity Whole House Humidifier for Homes up to 3,000 Sq. Ft., white : Amazon.ca: Home Aprilaire 500 Whole Home Humidifier, Automatic Compact Furnace Humidifier, Large Capacity Whole House Humidifier for Homes up to 3,000 Sq. Ft., white : Amazon.ca: Home](https://m.media-amazon.com/images/I/81Kbywu3VIL._AC_UF1000,1000_QL80_.jpg)
Aprilaire 500 Whole Home Humidifier, Automatic Compact Furnace Humidifier, Large Capacity Whole House Humidifier for Homes up to 3,000 Sq. Ft., white : Amazon.ca: Home
![Aprilaire 600 Whole Home Humidifier, Automatic High Output Furnace Humidifier, Large Capacity Whole House Humidifier for Homes up to 4,000 Sq. Ft. : Amazon.ca: Home Aprilaire 600 Whole Home Humidifier, Automatic High Output Furnace Humidifier, Large Capacity Whole House Humidifier for Homes up to 4,000 Sq. Ft. : Amazon.ca: Home](https://m.media-amazon.com/images/I/71jYVlDaKFL._AC_UF1000,1000_QL80_.jpg)
Aprilaire 600 Whole Home Humidifier, Automatic High Output Furnace Humidifier, Large Capacity Whole House Humidifier for Homes up to 4,000 Sq. Ft. : Amazon.ca: Home
![The house I bought has an old furnace with this Aprilaire unit attached. I see it's a humidifier, but as far as I can tell its main purpose is to let AC The house I bought has an old furnace with this Aprilaire unit attached. I see it's a humidifier, but as far as I can tell its main purpose is to let AC](https://preview.redd.it/c6254pc7mpq71.jpg?width=640&crop=smart&auto=webp&s=befff76a2e7e7420e0260bfdf4fd2b195ec8502f)