This specific model (B-17) uses a 20

Field-Ready Installation: Shipped with hex-head self-drilling screws for immediate mounting to compatible thermowells

it delivers a substantial 11 Cv flow capacity

tight seal with a high close-off pressure rating of up to 75 psi

provided the controller is configured to accept a standard 10k Ohm NTC Type II thermistor curve

Resideo ZD6X8TZ Damper 326058-757 This specific model (B-17) usesFor contractors managing residential or commercial air distribution, the Resideo ZD6X8TZ 6x8 rectangular damper offers a robust solution for multi zone HVAC applications. This parallel blade zone damper is constructed from heavy duty extruded aluminum for the frame and blades, ensuring a low profile, high integrity installation that minimizes duct pressure drop. Equipped with a 24Vac synchronous motor, the unit utilizes a power closed spring return