How much space is needed to install the 2nd Generation Wiser HubR?

When fitting a new 2nd Generation wallplate, the ideal location should have reasonable lighting, good access, no condensation, no extremes of temperature and a supporting surface that fully covers the back of the unit. 

Position the wallplate with 70mm clearance to the right, 25mm above and sufficient room to access the securing screws underneath. 

Fix, with terminals at the top, either directly to a flat wall using wall plugs and No. 6 x 1” (25mm) woodscrews, or on a flush mounting single conduit box type UA1 (BS4662) using M3.5 x 14 bolts. Now fit the 2nd Generation Wiser Hub^R onto the wallplate and tighten the securing screws. Check the 3A fuse, and switch on the mains.