Manual Humidifier Control

MPN
4655
SKU
1892741
In stock
1 Available At My Branch
2 Available At All US Supply Locations

The Aprilaire 4655 manual humidifier control is designed for professional HVAC installations requiring dependable humidity regulation in residential and light commercial systems. This control provides manual adjustment of relative humidity levels and is suitable for use with 24 VAC humidification systems. Engineered for straightforward installation and long-term reliability, it offers consistent operation with single-pole, single-throw (SPST) switching and a calibrated dial for precise system control.

Details

  • Model: 4655
  • Manufacturer: Aprilaire
  • Product Type: Manual Humidistat
  • Control Range: 15% to 50% Relative Humidity
  • Differential: 8% RH
  • Switch Type: SPST (Single-Pole, Single-Throw)
  • Voltage Rating: 24 VAC
  • Width: 4-1/2 inches
  • Height: 2-3/4 inches
  • Depth: 2-1/8 inches
  • Mounting Type: Wall or return-duct mounted configuration
  • Construction Features: Calibrated adjustment dial, durable housing, low-voltage terminals for secure wire connections
  • Application: Manual humidity control for central HVAC humidification systems
  • Compliance: UL recognized for low-voltage HVAC control use
  • Part Number: 1892741

Summary

The Aprilaire 4655 manual humidistat provides contractors with a reliable, low-voltage control solution for managing humidity levels in HVAC systems. Featuring a 15–50% RH adjustment range, 8% differential, and SPST 24 VAC switch, it delivers precise manual control and dependable operation in residential and light commercial humidification applications.

Specifications

Specifications
Weight 0.400000
Brand Aprilaire
ADA Compliance No
Color White
Length (inches) 6
Width (inches) 1.938
Height (inches) 3.375
Includes Wall-Mount Control, Mounting Screws, Drywall Anchors, Gasket, Installation Manual
Item Type Humidifier Parts
MPN 4655
Material Plastic
Product Family HVAC Parts
Sub Type Manual Humidistat
Suitable For Use With 400M, 400MK, 400MZ, 400MKZ, 500M, 500MK, 500MZ, 500MKZ, 600M, 600MK, 600MZ, 600MKZ, 700M, 700MZ, 700MKZ
Primary Voltage 24 VAC
Depth 5-1/8 in
Manufacturer Aprilaire
Type Manual Humidistat
Primary Voltage 24 VAC
Item Returns This item can be returned