The TACO 4 zone switching relay's layout helps make short work of most jobs. Its snap-in PC board easily replaces any zone switching relay without replacing or rewiring the entire box. Uses a standard "ice cube" replaceable relay that is compatible with conventional and programmable thermostats. Features external lights to provide instant diagnostic feedback. Item: Zoning Control Type: 4 Zone Switch Type: 4 Zone HP: 1/3 HP Per Zone Full Load Amps @ 120VAC: 6 Per Zone Current Drawn (Amps): Max 20 Height (In.): 10-7/8 Width (In.): 3 Depth (In.): 7 Mounting: Screw Holes Application: Circulator Zoning and Boiler Control Agency Compliance: UL Listed in US And Canada Includes: Instruction Sheet