![AprilAire 400M Whole-House Humidifier - Manual - Large Capacity Water Saver Furnace Humidifier for Homes up to 4,000 Sq. Ft. - Walmart.com AprilAire 400M Whole-House Humidifier - Manual - Large Capacity Water Saver Furnace Humidifier for Homes up to 4,000 Sq. Ft. - Walmart.com](https://i5.walmartimages.com/asr/8bf73083-c80f-4531-81cb-9db57cc1f595.0a4a6a69ee99f429c6d8144b53821b32.jpeg?odnHeight=768&odnWidth=768&odnBg=FFFFFF)
AprilAire 400M Whole-House Humidifier - Manual - Large Capacity Water Saver Furnace Humidifier for Homes up to 4,000 Sq. Ft. - Walmart.com
![Does anyone know what this is? We moved here in May and just discovered this “summer” and “winter” switch thing that is seemingly connected to the furnace? : r/Home Does anyone know what this is? We moved here in May and just discovered this “summer” and “winter” switch thing that is seemingly connected to the furnace? : r/Home](https://preview.redd.it/does-anyone-know-what-this-is-we-moved-here-in-may-and-just-v0-rrplu5wogqda1.jpg?auto=webp&s=8b8d3c232c5903df610a17603fa516e72d6bcee1)
Does anyone know what this is? We moved here in May and just discovered this “summer” and “winter” switch thing that is seemingly connected to the furnace? : r/Home
![Whole House Humidifier Installed On Furnace Duct Stock Photo - Download Image Now - Humidifier, Furnace, Home Interior - iStock Whole House Humidifier Installed On Furnace Duct Stock Photo - Download Image Now - Humidifier, Furnace, Home Interior - iStock](https://media.istockphoto.com/id/174824388/photo/whole-house-humidifier-installed-on-furnace-duct.jpg?s=612x612&w=0&k=20&c=2MDwLOpJlwmc2Is2n2yqxP_4J7cbWeTLTNZbx6HPP5A=)
Whole House Humidifier Installed On Furnace Duct Stock Photo - Download Image Now - Humidifier, Furnace, Home Interior - iStock
![Amazon.com: Condair HumiLife Residential Whole House Humidifier - Direct Furnace Mount or Remote Mount System - Covers up to 3,000 sq. ft. - The Economic Solution for Forced Air Heating : Home & Kitchen Amazon.com: Condair HumiLife Residential Whole House Humidifier - Direct Furnace Mount or Remote Mount System - Covers up to 3,000 sq. ft. - The Economic Solution for Forced Air Heating : Home & Kitchen](https://m.media-amazon.com/images/I/41WP5J9fp8L._AC_UF894,1000_QL80_.jpg)
Amazon.com: Condair HumiLife Residential Whole House Humidifier - Direct Furnace Mount or Remote Mount System - Covers up to 3,000 sq. ft. - The Economic Solution for Forced Air Heating : Home & Kitchen
![A GeneralAire Home Humidifier Attach To the Return Duct with a Bypass Connection To the Editorial Stock Image - Image of furnace, examining: 265739724 A GeneralAire Home Humidifier Attach To the Return Duct with a Bypass Connection To the Editorial Stock Image - Image of furnace, examining: 265739724](https://thumbs.dreamstime.com/z/calgary-alberta-canada-jan-generalaire-home-humidifier-attach-to-return-duct-bypass-connection-to-supply-hot-air-265739724.jpg)