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OPTION 3: Heat Pump backup Integration This option adds in a backup thermostat plus a hot water heat pump to top up the water temperatures as backup. This is especially beneficial in the early years as the heat core heats up, but is equally significant with respect to the hot water as it it also backs up the Hot Water.
The DSHH controller controls the timing of the backup for hot water and is programmable into the unit. There are 3 time groups that can be used, most people need only one. As a rule this can be set at a time in advance of showering to ensure enough hot water for showers, typically 2hrs with the 9kW HP.
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