Your boilers run all night for guests who are asleep.
Piped natural gas is the second-largest utility bill in most hotels, and the hot-water loop is where it goes. Nobody sees the waste because nobody measures the loop. One probe changes that.
Hot water supply
Water temperature at 00:36
- Type
- Water temp probe
- State
- Active
- Battery
- 83%
- Last reading
- 23 Oct, 00:36
Fig. 1 — Water temperature, last 1 h
Smart Logger at The Westin Gurgaon: the hot-water supply, read every few minutes, on one screen with the room loggers and energy meters.
Why hotel hot water costs more than it should
A hotel's calorifiers hold the supply at a fixed temperature, 24 hours a day, whatever the occupancy. The setpoint was chosen for a full house on a cold morning and has never moved since. At 3 a.m. with 60% occupancy, the boilers are still firing to hold the same number.
The engineering team can't trim it blind. Go too low and a guest gets a lukewarm shower — the one complaint every GM hears about. So the setpoint stays high, the firing schedule stays continuous, and the gas bill is treated as fixed.
The missing piece is a trace: what the supply temperature actually does across a day, against occupancy. Once the loop is measured, the hours where it runs hotter than it has to — and the stretches where it needn't run at all — are obvious on a chart, and the trim can be made with confidence instead of courage.
From a probe to a lower gas bill
Clip on a probe
A wireless, battery-powered water-temperature probe on the supply line. No wiring, no plant shutdown, live the day it goes in.
See the loop, not the setpoint
The trace shows when the loop runs hotter than it needs to and when demand is near zero. Overnight and mid-afternoon are usually where the gas goes.
Then let the AHUs run themselves
The same platform runs the hotel's air-handling units autonomously — ballrooms, lobbies and corridors cooled when they are used, inside bounds your team sets. SKW EnergyOS is live at The Westin Gurgaon.
On the hot-water supply line, wireless
Between readings, around the clock
Water, room, CO₂ and energy loggers on one register
No BMS integration needed to start
Questions we get asked
Will guests notice?
No — that is the point of measuring first. The trace tells the team how far the setpoint and schedule can move with the supply still comfortably above what a guest needs at the tap.
Does this need our BMS?
Not for the loggers. They are wireless and battery-powered and report to their own screen. The autonomous HVAC layer connects to the BMS later, when you are ready.
How much gas will we save?
It depends on how far above demand the loop is running today, which is exactly what the first month of data tells you. We report savings per site after a full billing cycle rather than quote a number up front.
Is it proven in a hotel?
Yes. SKW EnergyOS and Smart Logger are live at The Westin Gurgaon, New Delhi.
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