18 April 2012 – The installation of two air-to-water heat pumps at the SA War College hostel in Pretoria was recently completed by Ai-TEC.

“These ThermoWise heat pumps, which meet the requirements of Eskom’s specifications to enable users to qualify for various rebates, have been installed at the hostel to reduce electricity consumption and to minimise maintenance requirements of the establishment’s water heating system,” Arnold Retief, director of Ai-TEC, says. “It uses approximately a third of the electricity normally required with standard resistance heating.”

Two 45 kW heat pumps have been connected to the existing 6,000 litre storage vessel at the hostel. New SCH 40 hot water pipelines, with galvanised lagging and cladding and circulation pumps, have also been installed.

These heat pumps, which have replaced the existing geyser elements, use atmospheric temperatures (as low as -10°C) for heating water. This reduces electricity consumption by up to 66 %. Although the fluctuation in atmospheric temperature does affect the heating capacity of the system, the water in the storage tank is always heated sufficiently.