Aprilaire 4010 Transformer 320074-702 Helix-wound nichrome elements are exposed

Helix-wound nichrome elements are exposed directly in the airflow for instantaneous heat transfer and consistent discharge temperatures

Technicians should note its approximate weight of 83 lbs and dimensions of 34" x 36" x 25"

and 3" lengths to ensure proper immersion depth across multiple nominal pipe sizes

the Williams 9929 is specifically configured for Forsaire top-vent models

Utilizing rust-resistant nickel chromium heating elements

Aprilaire 4010 Transformer 320074-702 Helix-wound nichrome elements are exposedThe Aprilaire 4010 Transformer is a high quality HVAC step down transformer designed to convert 120V primary power to a 24V secondary output, making it an essential component for residential humidification systems. This 10VA low voltage transformer is engineered for a utility box mount, providing a safe and stable power source for Aprilaire humidifier 24V components. Built for long term reliability in HVAC applications, it is the standard 24V