close regulators modern digital gas boiler setting the central heating level |
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| navigate by keyword : adjusting appliance automatic boiler boiling burn button central close closeup cold comfort control device digital display domestic energy fire gas gasfired heat heater heating home hot house household indicator installation knob level modern panel regulator regulators safety setting smart system tank temp temperature thermal thermostat turn water |
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| Close-up regulators a modern digital gas boiler. Setting the central heating level in a gas boiler panel |
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