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Postma Heating & Cooling Inc is proud to be an authorized dealer for Reliable Controls Corporation.


Reliable Controls manufactures a broad range of BACnet compliant products for the Building Automation Industry (BAS). These products, also known as Direct Digital Controls (DDC) systems or Building Management Systems (BMS), and can be customized to monitor and control the Heating, Ventilation, and Air-Conditioning (HVAC) equipment in commercial, institutional and agricultural buildings.

We give our customers the satisfaction of having an intelligent building that will operate at a lower cost and provide flexibility for the future.

Need HVAC Service? Contact the experts at Postma.



Reliable Controls Authorized Dealer, Postma Heating and Cooling, completed work on the Chatham-Kent Childrens Services administration building. The project’s primary focus was to retrofit Variable Frequency Drives (VFDs) with existing Roof Top Units (RTUs). Postma installed 16 MACH-ProZone (MPZ) controllers, one for each of the existing RTUs, to control the VFDs. Thanks to the flexibility of the MPZ, Postma were able to keep the installation costs down and reduce the fan on-load while improving dehumidification.


Reliable Controls Authorized Dealer, Postma Heating & Cooling successfully completed a retrofit installation of a monitoring system for the River Row residential complex in Chatham, Ontario.

In somewhat of a pilot project, Postma installed a wireless monitoring solution into 30-year old condos that had previously been running without a controlled BAS. With energy costs on the rise, one building in the complex was singled out as a test case.

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Experts You Can Trust

Our mission is to provide valuable and informative services that ensure the comfort and safety of our customers.  

We have been serving Chatham-Kent and the surrounding area for over 30 years. Established in 1989 by brothers, Ron and George Postma and their wives, Hetty and Linda – the company continues to be family owned and operated to this day.  

Postma Heating & Cooling Inc. employs certified, local contractors that are dedicated to understanding your unique situation, providing you with valuable solutions, and presenting you with a price before the work begins. We are pleased to provide a Service Partner Plan and regular maintenance options to catch small problems before they have the chance to grow into serious ones.