Tryac Unit 3 Isaac Newton Way, Alma Park Industrial Estate, Grantham , Lincolshire , NG31 9RT United Kingdom About Solutions products software Companies Tryac Products Tryac - Model BMGB - Heater Controller Tryac - Model BMGB - Heater Controller From Drying 0 Share The BMGB heater controller is used to modulate the gas input to any type of gas heater giving the correct heat output necessary to achieve set targets.Used on portable or down stream heaters this unit is easy to install and to operate. Customer reviews No reviews were found for Tryac - Model BMGB - Heater Controller. Be the first to review! Add your review Publish your review Great! review successfully added!