The SAS UWT is a solid fuel boiler with a power output of 29 kW, designed for efficient heating.

It utilizes upper and lower combustion and is managed by a microprocessor electronic regulator with a blower fan for forced draft. The unit offers an efficiency between 79.1% and 85.9%, a heating surface of 2.5 m², and a water volume of 98 l. It operates at a working pressure of 1.5 bar with water outlet temperatures ranging from 60 °C to 90 °C.

Manufactured in Poland, this boiler is constructed with 6 mm thick steel. It weighs 420 kg and has dimensions of 1470 x 680 x 1080 mm. The combustion chamber measures 540 x 550 mm with a volume of 75 l, and the feed channel is 340 x 200 mm. The flue diameter is 180 mm.

This system is suitable for heating areas up to 300 m² using solid fuels such as coal.