Reported weather-adjusted gas saving for the house and heated pool.
A full billing year
The complete year before installation compared with the complete year after.
An individual OH4 installation result. This is not a forecast for your building.
Two boilers, one comparison
At the end of September 2024, OH4 was fitted to pipework serving both boilers: 50cm at the house and another 50cm at the separate swimming pool.
The assessment uses complete billing cycles, supported by supplier information and the property’s smart meter.
The evidence behind the result
| Source data | Energy supplier billing and the property’s smart meter. |
|---|---|
| Baseline year | 28 September 2023 to 27 September 2024. |
| Comparison | The full billing year following installation. |
| Recorded gas consumption | 116,857 kWh before and 106,482 kWh after. |
| Reported adjusted consumption | 96,898 kWh after adjustment for weather. |
| Reported adjusted saving | 19,959 kWh, or 18%, across the year. |
| Weather data | 2,313.3 degree days before and 2,519 after. |
The 18% is the adjusted result. It is not the unadjusted change between the two meter totals. A house and pool have different operating patterns from a commercial building, so this is not a forecast for a hotel, care home or office.
Read the source
V1 Energy Solutions is a UK-based reseller of the OH4 Energy Saving System, working with clients worldwide. This published case study concerns an OH4 installation. The original report may name OH4 or its installation partner.
Review the supplier data and the degree-day adjustment together. The raw and adjusted figures are shown separately above.
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Related evidence: The Headland Hotel · All case studies