About Us


HEVAC is a dedicated controls company specializing in supplying control systems for the commercial Air-Conditioning industry. 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 20 years estimating experience. Trevor has over 40 years experience designing, manufacturing & commissioning air conditioning & other control systems. We manufacture our controls in-house for fast turn around & quality control by well trained dedicated staff that have been with us for over 20 years.

HEVAC was appointed an authorised SIEMENS Victorian distributer several years ago and is now a major part of our business. We tender, engineer, supply & site commission Siemens control systems, from small package unit systems up to large projects utilising the Siemens “SYNCO” range of controls 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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