About Us



HEVAC is a company specializing in supply of environmental control systems for the commercial Air-Conditioning industry. We are probably best known for our legendary ultra reliable HTC2 & 4 temperature controllers that have been in continuous production for over 35 years. Our four sales staff are well known for industry knowledge & service, built up over many decades. If we don’t make it or stock it, Lisa or Nick will find you a part from someone that does. If you need a project quote, Shaun has 30 years estimating experience. Trevor has over 45 years experience designing, manufacturing & commissioning air conditioning & other control systems. We mostly manufacture our controls in-house for fast turn around & quality control by well trained dedicated staff that have been with us for over 25 years. Our Australian designed & manufactured premium product : ENDEAVOUR is an extremely powerful multi function universal controller for stand alone or multi A/C unit systems. In recent years, Car Park CO & building CO2 measurement & control has also became a major focus of our business activities, plus the multitude of delay timers and interface gadgets we produce to solve all those problem interlocks that are needed in our industry especially for non BMS projects.

SIEMENS appointed HEVAC an approved Victorian distributer several years ago and is now a large part of our business. We tender, engineer, supply & site commission Hevac & Siemens control systems, from small package unit systems up to large projects utilising the Siemens “SYNCO” range of controllers that can be networked & connected to the WEB for remote viewing & control.


HEVAC was established in 1985 by Trevor Sweetman & Lou Mitsy.

HEVAC have been producing the now legendary simple & reliable HTC2 & 4 series of controllers since the late 1980’s. Trevor & Lou had already many years of experience in the Air-conditioning Controls Industry, commencing their careers in 1977 with SIEMENS formerly known as LANDIS & GYR / BILLMAN then worked together for several more years at TOUR & ANDERSSON before starting HEVAC, which was initially set up as Victorian distributors for ERIE & GEAMATIC controls systems. The company then went on to start manufacturing & promoting our own range of A/C controls and also made gear shift electronic controls for both HOLDEN & FORD. Our control manufacturing & new product design continues to this day.

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