HVAC Controllers

Optimize Operation & Reduce Energy Consumption

Quest Controls offers a range of intelligent HVAC controllers designed to meet the needs of your facility, ffrom small telecom shelters to large critical infrastructure sites.

Boost Efficiency & Reduce Costs with our HVAC Solutions

Quest Controls offers a range of intelligent HVAC controllers designed to meet the needs of your facility, from small telecom shelters to large critical infrastructure sites.


Model 600 Lead/Lag Controller: Replaces outdated control systems with an intelligent solution offering remote communication. Great for small & medium facilities, cabinets & remote shelters.


Model 400 HVAC Controller: A comprehensive monitoring and control system designed to work as a standalone HVAC control system or in conjunction with the TELSEC ESB2 Environmental Controller. Great for medium & large facilities.


T-stat Models 100/101 & 200/201: Low-cost and easy replacements for traditional lead/lag controls, optimizing operation and reducing energy consumption.

Optimize Operation & Reduce Energy Consumption

Remote Monitoring & Control

Easy Installation & Use

Reliable Performance

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T-Stat Product Matrix in PDF

Quest T-stat Lead/Lag Controller Models 100 & 101 are a smart control system designed to replace conventional Lead/Lag controllers that do not offer wide temperature control windows for advanced optimization of HVAC operation

Model 100 & 101 Lead/Lag Controller

T-stat Model 100 & 101 Lead/Lag Controller Optimize Operation & Reduce Energy Consumption The Quest T-stat Lead/Lag Controller Models 100 & 101 are a smart ...
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The Quest T-stat Model 200 & 201 Lead/Lag Controllers are a smart control system designed to replace conventional lead/lag controllers that do not offer wide temperature control windows for advanced optimization of HVAC operation.

Model 200 & 201 Lead/Lag Controller

T-stat Model 200 & 201 Lead/Lag Controllers Optimize Operation & Reduce Energy Consumption The Quest T-stat Model 200 & 201 Lead/Lag Controllers are a smart ...
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The Model 400 Controller (PN #150966-5) is designed to work as a standalone HVAC control system or in conjunction with the TELSEC® ESB2 Environmental Controller to provide a comprehensive monitoring and control system for Telecom/broadband facilities.

Model 400 HVAC Controller

Model 400 HVAC Controller A Comprehensive Monitoring & Control System for Telecom/Broadband Facilities. The Model 400 Controller (PN #150966-5) is designed to work as a ...
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The Model 600 Lead/Lag controller provides the best low-cost HVAC automation solution for your critical facility. The controller outperforms comparable devices through its rugged design, intuitive display/keypad, ease of set-up, Bluetooth communication, and Quest’s patented economizer control algorithm.

Model 600 Lead/Lag Controller

Model 600 Lead/Lag Controller Replace Old Antiquated or Obsolete Control Systems with an Intelligent Controller that Provides Remote Communication. The Model 600 Lead/Lag controller provides ...
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