· Hot water boost & central heating advance, 1 hour boost on HW and advance on heating. · GMT / BST automatic clock.
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The H3747 also includes many of the latest Boiler Plus energy-saving features such as optimum start and stop per heating zone, as well as on-off load compensation. 12-year battery life warranty on programmable thermostat display (PTD).
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The Tiara has all the capability and features of the 425 Diadem, but without the indicator lights. The Tiara is ideally suited for both gravity systems and fully pumped systems with either mid-position or zone valves.
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8 Radbot1 TRVs with converters for different valve types (Requires two standard 1.5V AA alkaline batteries). Thermostat (connects directly to the boiler). One TRV clip has snapped, though it still attaches securely and works as intended.
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