TANGRA present solution for heating of small apartment buildings, offices, auto services, sport halls, hotels and restaurants, public buildings and schools. Pellet boilers TANGRA are designed not only for heating, but also for domestic hot water supply. The pellet burners are with 5 step modulation and variable heating capacity. The water connections are on the top and side panels for easy connection with installation. The electro pneumatic system for cleaning with compressed air allows working during the whole season without and problem.