Christopher Lister

Envirotec Ltd. designs, manufactures and supplies air handling equipment. Its products include air curtains, heat pump air curtains, trench heating systems, analogue and energy saving controls, air handling units, internal and external extract units, envirolators and stock room heaters, and cold aisle heaters, as well as axial, bifurcated, and smoke fans. The firm strives to be the industry and takes pride in delivering design and supply of products, planned and reactive maintenance, refurbishment of existing plant and consultation and project management. The company was founded in 1969 and is headquartered in High Wycombe, the United Kingdom.

Crossco (820) Ltd. operates as a holding British company with subsidiaries that manufacture and distribute air handling equipment, mechanical, and electrical engineering products. The private company is based in High Wycombe, UK and has subsidiaries in the United Kingdom.