About Us


Shamus Rennie (Pty) Ltd was established in Port Shepstone on the Natal South Coast in 1958 by Shamus Arthur Rennie. Shamus's son, Malcolm Rennie, joined the business in 1965 as an apprentice and when Shamus passed away suddenly at the end of 1968, Malcolm took over the business with the support of his mother, Constance, until her retirement in 1974.

Whilst the refrigeration and air conditioning business on the South Coast became well established, Malcolm realised in the mid 1980's that there was potential to expand the business to provide countrywide air conditioning solutions for clients. (These solutions were originally focused on the various banking institutions). An office was opened in Johannesburg in 1991 to support this strategy and the volume of work attained in Johannesburg eventually necessitated Shamus Rennie (Pty) Ltd's head office (including the in-house sheet metal factory) being established in Johannesburg in 1993.

By this time, three of Malcolm's four children, Carla, Ryan and Kyle, had joined the company and Malcolm's daughter-in-law, Michelle, joined in 1997.

Malcolm's retirement in 2012 resulted in Shamus Rennie (Pty) Ltd becoming a third generation family managed business with Ryan, Kyle, Michelle and Carla striving to write the next chapter of the Shamus Rennie (Pty) Ltd story as eloquently and colourfully as Shamus and Malcolm.

Nature of our work

What We Do

We’re a specialist HVAC (Heating, Ventilation & Air Conditioning) contracting company based in Johannesburg, Gauteng with service offerings (including installation, repairs, maintenance and our own sheet metal factory) on a national basis as determined by client requirements.

Who We Are

Shamus Rennie (Pty) Ltd is and always will be a family business. We nurture a culture that is unique and special in an attempt to avoid corporate behaviour at all costs. We strive for excellence in all that we do and pride ourselves in taking on challenging projects and situations that require constant adaptation and focus.

We celebrate values that include absolute honesty and integrity, a sense of fun in what we do, positively impacting people with our attitudes, giving people opportunities to be their best and appreciating our customers and each other. We strive for value-driven profits and share these profits with our people.