![Aprilaire Model 500M Manual Whole House Medium Capacity Furnace Humidifier for up to 3,000 Square feet - Walmart.ca Aprilaire Model 500M Manual Whole House Medium Capacity Furnace Humidifier for up to 3,000 Square feet - Walmart.ca](https://i5.walmartimages.com/asr/e617992b-6c01-49c8-9fa3-c506ee8f8733.9eb8314e0ae4f266e7122a423f8fc9d1.jpeg?odnHeight=612&odnWidth=612&odnBg=FFFFFF)
Aprilaire Model 500M Manual Whole House Medium Capacity Furnace Humidifier for up to 3,000 Square feet - Walmart.ca
![Aprilaire 700 Whole House Fan Powered Humidifier, Automatic High Output Furnace Humidifier : Amazon.co.uk: Home & Kitchen Aprilaire 700 Whole House Fan Powered Humidifier, Automatic High Output Furnace Humidifier : Amazon.co.uk: Home & Kitchen](https://m.media-amazon.com/images/I/71m-8xEoujL._AC_UF894,1000_QL80_.jpg)
Aprilaire 700 Whole House Fan Powered Humidifier, Automatic High Output Furnace Humidifier : Amazon.co.uk: Home & Kitchen
![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)
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
![Aprilaire 700 Whole House Fan Powered Humidifier, Automatic High Output Furnace Humidifier : Amazon.co.uk: Home & Kitchen Aprilaire 700 Whole House Fan Powered Humidifier, Automatic High Output Furnace Humidifier : Amazon.co.uk: Home & Kitchen](https://m.media-amazon.com/images/I/71dyQYy78TL._AC_UF350,350_QL80_.jpg)