Burner, Boiler & Hydronic controls include fan relays, fan managers, electric furnace sequencres, control centers, electronic intermittent pilot modules, intermittent pilot modules, universal intermittent pilot modules, universal hot surface ingition modules, universal retrofit intermittent pilot gas ignition systems, direct spark ignition systems, gas ignition modules, spark ignitors, flame rectiication sensors, pilot burners, ignitor-burners, thermopile generators, thermocouples, oil primaries, interrupted electronic oil primary, protectorelay oil burner control, cad cell, cadmuim sulfide flame detectors, pressuretrol controllers, high limit controllers, fan and limit controllers, aquastats, remote bulb controllers, combination aquastat and high limit controller, multiple aqaustat controllers, triple aquastat relay, oil electronic aquastat controller, combination protectorelay and hydronic heating controllers, aquatrols, hydronic circulator zone panels, hydronic valve zone panels, hydronic switching relays, universal switching relays, air vents, expansion tanks, air purgers, fill valves, supervents, backflow preventers, service check valves, and tridicators.