CAST ALUMINIUM HEATERS Cast Aluminium Heaters provide a high heat source, 40 w/square inch, they are ideal where moisture problems occur. These Heaters (and Heater/Coolers) are finished machined to close tolerances with cut-outs, holes to suit clients requirements. Delivery within 2-3 weeks, a 24-hour emergency service is available at no extra cost. Terminals as required.