The MAC-4 puts an end to difficult and costly job site wiring nightmares. Circuit board housed in oversized 18 gauge electrical box with multiple knock-outs for easy wiring connections. I Includes Gas Pressure Switch, Spillage Switches and all necessary hardware to interlock a Power Venter or Draft Inducer to an instantaneous water heater or millivolt pool heater. VH1 Series Vent Hoods Specially designed to terminate Tjernlund Side Wall Vent Systems . They are also an approved method of terminating many horizontally vented appliances.
Vent hoods feature heavy duty, corrosion resistant aluminum construction.
Building exteriors are kept clean while the aesthetics of the structure remain undistributed. All mounting hardware is included. Chimney configurations, mechanical draft fans and weather can cause draft fluctuations. These fluctuations result in inefficient combustion and more frequent service calls. Draft controls regulate the airflow through a chimney or vent.