Research Products 4039 Humidistat Adaptor Plate for Aprilaire Humidifier

4335 Feed Tube Assembly with Compression Sleeve & Nut Compatible with Aprilaire

CARRIER 4402 Humidistat Adapter Plate 3-3/4" Rectangle Transformers

4335 Feed Tube Assembly with Compression Sleeve & Nut Compatible with Aprilaire

Honeywell Decorative Cover Plate W/ Standard Installation Adapter 32313163-002

Aprilaire Model 56 Humidistat Automatic Humidifier Control Garage

Master Flow HT1 Humidistat Thermostat Control For Automatic AtticVents

Humidifier Part # apr4039 - Plate Humidstat