Dimensions: 5.2 in × 5.2 in × 1.2 in
Weight: Approximately 0.5 lb
Appearance: White plastic housing with gray trim and smooth cover

Power Requirements:
24 VAC, 50/60 Hz, or
AA batteries for backup operation
Electrical Characteristics:
Inputs: 24 VAC, 50/60 Hz, 3 VA
Outputs:
Minimum load: 1,000 ohms
Maximum load: 2.0 A, 50% power factor (inductive)
Nominal load capacity: 1.5 A

Uses proportional‑integral calculation to determine:
Required heating or cooling stages
Fan speed (for fan coil unit applications)

Operating Temperature: 32°F to 104°F (0°C to 40°C)
Storage Temperature: ‑40°F to 135°F (‑40°C to 57°C)
Humidity: 0–95% RH, non‑condensing