How Much Can the Mr Silence MS70 Save You?
Share
The Mr Silence MS70 7kW heat pump — built to cut your hot tub's running costs without sacrificing power, even through a British winter. But how much does that actually mean on your electricity bill, and how long before it's paid for itself?
The real-world numbers
In independent testing, a 7kW heat pump fitted to a 32-amp hot tub reduced daily energy use from 11.4kWh to 4.1kWh— a 64% cut. Using today's(Oct 2026) Ofgem price cap rate of 26.32p/kWh, here's what that looks like in pounds and pence:
| Without MS70 | With MS70 | |
|---|---|---|
| Daily energy use | 11.4 kWh | 4.1 kWh |
| Daily cost | £3.00 | £1.08 |
| Daily saving | £1.92 | |
| Estimated annual cost (run year-round) | £1,095 | £394 |
| Estimated annual saving | £701 |
(Based on 8°C outside temperature, 38°C water temperature, 1-hour daily filtration cycle, and no one using the spa — your actual saving will vary with how often you use your tub and the weather, but the proportion holds: running costs drop by around two-thirds.)
How long until it pays for itself?
At £1,699, and saving around £701 a year, the MS70 pays for itself in roughly 29 months — just under two and a half years. After that, every pound it saves is money back in your pocket, for the rest of its working life.
Ready to cut your running costs?
The MS70 starts saving from day one. Shop the Mr Silence MS70 →