Honeywell H205A1012 - Basic Enthalpy Controller


The Honeywell H205A1012 is a basic enthalpy controller used with Honeywell legacy systems.

The H205A1012 senses total heat content (temperature and humidity) of outdoor air and mounts in any position in outdoor air duct. The H205A1012 controls amount of outside air brought into system with respect to total heat content (or enthalpy) of outside air. Combines temperature and humidity sensors into a single device along with a nylon humidity sensor and liquid-filled bulb temperature sensing element which is mounted on back of control.

Product Specifications


Description Senses total heat content (temperature and relative humidity) of outdoor air.
Voltage 24 Vac
Frequency 50 Hz, 60 Hz
Contact Ratings Terminals 1 and 2: 50VA at 24Vac.
Contact Ratings Terminals 2 and 3: 100mA minimum to 250mA maximum at 24Vac.
Operating Temperature Range (F) 53 F to 78F
Operating Temperature Range (C) 12 C to 26 C
Operating Humidity Range (% RH) 10 to 80% RH
Dimensions (in.) 5 1/4 in. high x 3 1/16 in. wide x 1 3/16 in. deep
Dimensions (mm) 133.3 mm high x 79 mm wide x 30.2 mm deep
Approvals, Underwriters Laboratories Inc UL Listed File: E4436, Guide: XAPX2
Comments Includes case and cover, mounting plate, adjustable knob and scale. Used With W859F.