Tomkins is an engineering and manufacturing company privately owned by Onex Corporation and Canadian Pension Plan Investment Board, operates globally and is the ultimate parent of a large number of subsidiaries that are organised into two separate business groups: Industrial & Automotive and Building Products.

This group manufactures air handling and distribution components, supplying to both residential and  non-residential heating, ventilation and air conditioning markets. Industrial and commercial products are sold under the brand names of Titus, Ruskin, Rolastar, Trion, Envirco, Lau Fan, PennBarry, Koch Filter, Caryaire.