All Around Heating Products Ltd Manufacture high quality electric duct / air heater batteries. We take pride in our energy efficient controls, workman ship, delivery and service. AAH specialize in what we do. Our on-line service gives customers the benefit of being able to download information from where and when they want, and also to buy circulars from stock. Our energy efficient controls use a Triac or Thyristor as well as a self-tuning algorithm; this gives maximum efficiency in keeping temperature required. As well as all this it has many other features. We have over ten years experience in the heater battery business.