Description
The AprilAire 300 is a self-contained, whole-house evaporative humidifier built to handle up to 2,000 square feet in average constructed homes at a 13-gallon-per-day capacity. Unlike duct-mounted humidifiers, the self-contained cabinet design allows it to be installed independently of the home’s heating system, making it compatible with mini-splits, boilers, radiant heat, and ductless systems in addition to standard ducted forced-air furnaces. An onboard humidity sensor continuously monitors indoor relative humidity and automatically activates the fan when levels drop below the set point, while the included Model 65 digital manual humidistat provides a high-contrast screen for easy adjustment. The unit is designed and manufactured in the USA and is compatible with the AprilAire Healthy Air System for whole-home air quality integration. Constructed of galvanized steel, the cabinet measures 12.43″H x 22.07″W x 14.375″D. Everything needed for installation is included in the box.
Features:
- Self-contained design works independently of ducted systems — compatible with mini-splits, boilers, radiant heat, and other ductless setups
- Whole-house coverage up to 2,000 sq. ft. in average constructed homes at 13 gallons per day
- Digital manual control via included Model 65 humidistat with high-contrast display
- Onboard humidity sensor automatically triggers the fan when humidity drops below the set point
- Galvanized steel cabinet construction, designed and manufactured in the USA
Included in the Box:
- 300 Humidifier unit
- Model 65 Digital Manual Humidistat
- Model 35 Water Panel
- Saddle valve
- 6-foot power cord
- Mounting brackets
- Installation instructions
- Owner’s manual
Specifications:
- Materials: Galvanized steel
- Dimensions: 12.43″H x 22.07″W x 14.375″D
- Capacity: 13 gallons per day
- Coverage: Up to 2,000 sq. ft. (manufacturer AHRI Guideline F rating)











Reviews
There are no reviews yet.