Honeywell AQ252 AQUATROL universal injection/mixing boiler reset controls for single temperature, residential hydronic heating systems ensure ample supply of hot water through energy-efficient outdoor temperature compensated control. Honeywell Aquatrol® Boiler Reset Control Panel, Injection/Mixing, Series: AQ252, User Interface: DIP Switch, 4 Zones, Boiler Output: 24 VAC 0.5 A 12 VA, 38 VA, 10 ft Lead Length, 2 x 14 AWG Wire, Wire-Clamp Screw Terminal, 8 in H x 16-1/2 in W x 3-3/8 in D, Import