Greenbrook DH021A Tubular Door Chime

The Greenbrook DH021A is a versatile digital heating programmer designed to provide reliable time control of domestic central heating systems. Suitable for a wide range of residential installations, this unit allows users to set precise heating schedules to match their daily routines, improving comfort while helping to reduce unnecessary energy usage and running costs.

Featuring a clear digital display and straightforward push-button interface, the DH021A offers simple programming and easy day-to-day adjustment. Users can quickly set on/off periods and override settings when required, giving full flexibility over heating control without unnecessary complexity. Its intuitive layout makes it suitable for both installers and end users.

Designed for compatibility with standard domestic heating systems, the DH021A delivers dependable switching performance and consistent operation. It provides accurate control of heating cycles, ensuring the system runs efficiently and only operates when needed. This helps improve overall energy management while maintaining a comfortable indoor environment.