ESI

Direct replacement for Honeywell V4043H zone valve. Includes spring return actuators for reliable operation. Features a manual lever for easy system filling and draining....

Programmable with options for 7-day, 5/2 day, or 24-hour scheduling. Supports up to 6 adjustable time and temperature settings. Energy-saving features include optimum star...

Two-zone control system for personalized heating and hot water settings. Large LCD display with blue backlight for easy navigation. Customizable scheduling: 7-day, 5/2, or 24...

3-zone heating control for tailored warmth and efficiency throughout the home. Large, easy-to-read LCD display with blue backlight for visibility in low light. Customiz...

Consistent temperature control for even warmth and cooling throughout the home. Energy-efficient design saves up to 10% more compared to older mechanical units. User-friendly...

Up to 10% more energy efficiency compared to traditional mechanical thermostats. Intuitive design for easy temperature management with clear displays and quick controls. Robu...

Reduces gas consumption by up to 15% when used with Opentherm compliant boilers. Provides control over one heating zone and hot water via ESi WiFi or traditional ther...