For the last 20 years, linear systems is the foremost manufacturer of burner controllers for boilers and furnaces. Burner controllers are specially made which are housed in an abs plastic enclosure with overall size of 70 mm [l] x 110 mm [b] x 105 mm [ h]. The enclosure consists of a base and plug in controller module, which smooth the progress of easy replacement at sites. Following are the lists of various models: