Heatmiser Slimline HW-N V2 12v Programmable Thermostat inc Hot Water £62.10 The Heatmiser Slimline HW-N V2 is our low voltage 5/2 / 7 day programmable thermostat with an additional 5/2 / 7day program for a domestic hot water cylinder. Reduced costs and wiring means the Slimline HW-N V2 really is an all-in-one solution...