Honeywell THM5421R1021 IAQ Equipment Interface Module

Product Information

We sell into the residential, commercial and industrial market segments for new construction, replacement, repair, remodel, parts and service.

It looks like we can consider this one complete, so I will lock the thread shortly unless I can help out with anything else. You can easily relocate a thermostat or upgrade equipment without running new wires when using this module and a wireless FocusPRO® thermostat. At Cold Air Central, we pride ourselves on being a trusted authority in the world of HVAC supplies, equipment, and parts. I own a Honeywell VisionPRO thermostat (TH8320R1003) which is used to control my natural gas furnace through an Honeywell Equipment Interface Module (THM5421R1021).It features three sets of universal IAQ contacts to control humidification, dehumidification and ventilation.

This dependable module uses advanced communication protocols that help improve control of the HVAC system. My current Honeywell visionPRO IAQ (TH9421C1004) thermostat is not working as the touchscreen is somewhat dead and unresponsive.Applications include Gas, oil, electric, heat pump, forced warm air, hot water, steam or gravity systems. Cold Air Central is a HVAC and refrigeration supply company providing a wide range of supplies for HVAC installers, HVAC contractors, and HVAC company repair person and as well as local, state and federal government. With 31 Famous Supply locations in Ohio, western Pennsylvania, and West Virginia, your local Famous counter has everything you need to help you get your project done. Discover indoor and outdoor LED lighting options from undercabinet to ceiling and vanity, you can trust Bright33 for convenience, quality and value. If my 24v goes dead then the furnace isn't going to run anyway even if my thermostat is still functional.

All this and much more is available to you absolutely free when you register; for an account, so join our community today today! Right now there are absolutly no wires connected between the stat and the furnace or the equipment interface module. Understanding the importance of quality and reliability, we supply an extensive selection of energy-efficient heating equipment for sale, as well as energy-efficient HVAC equipment designed to elevate the functionality and efficiency of existing systems. Please let me know if you have other questions or concerns as I will be locking this in 24 hours if I won't hear back from you again.The THM5421R1021 interface module streamlines the performance of the system helping clients reduce energy costs. They design and manufacture products that allow buildings to be cooled, heated, ventilated, and humidified. Still it could well be that this lithium battery keeps the programming intact also and the alkaline batteries power the communications, I don't know.