60%+
Heating and hot water can be most of a hotel’s energy.
Institute of Hospitality, as context for why the plant room matters.
Impact
A kilowatt-hour that was going to be heat can preheat water first.
Compute becomes heat. In a hotel that heat has somewhere to go: the cylinder, and often the pool. The honest claim is metered heat delivered to a preheat loop — not a guaranteed bill, and not a carbon certificate we have not earned.
60°C
A common stored hot-water setpoint. Distribution is a separate control.
HSE legionella guidance stays with the hotel’s existing plant. We do not take it over.
19–24
kWh/day of recoverable heat from an H1 node, typical range.
Node specification. A site report replaces the range with a meter.
What the monthly report is for
Electrical import. Heat moved across the exchanger. Hours the node ran. Notes when it stopped. That is the pack a sustainability lead can file. If the loop was not calling for heat, the report should say so.
Locker nodes are different. Their report is compute delivered and heat kept inside the bay. We do not count rejected street heat as a hotel saving.
Where it is meant to spread
First
Independent hotels in the UK, including leisure sites with a pool.
Then
Regional groups, once a pilot has a year of meters rather than a slide.
And beside that
Locker networks — one bay at a time — as the distributed server estate.
Later
EU, then China chain hotels. Geography follows the heat sinks, not a logo map.
Hotels are practical heat sinks.
They already run hot water all day, and many run a pool. That is the reason to start there — not because a hotel should become a data centre.