A Family Run Business with Traditional Family Values. Manufacturers of Unvented & Gravity Fed Water Heaters. Aquastan products are like no others currently on the market. They are the culmination of years of heating experience combined with an abundance of design skills and unrivalled engineering know-how. The Result... A range of technically superior and infinitely more efficient products achieving incredibly low lifetime costs. The Unique Novacon (tm) Water Heating System for Ground Source Heat Pumps. Energy Efficient Heating, Eco-Friendly & Cost Saving, Condensing Boilers, Central Heating Systems, Domestic & Commercial. For more information Call Freephone 0800 7818 649.