Reported reduction in gas use per degree day.
April 2024 to June 2025
The reporting window given in the published summary.
An individual OH4 installation result. This is not a forecast for your building.
A small commercial building
The Chamber’s Plymouth offices are heated by a single gas boiler. OH4 was fitted in April 2024, with the published case study recording an installation time of one hour and no downtime.
The result is relevant to the question of how to assess existing office heating plant. It applies to this office and its monitored operating conditions.
The evidence behind the result
| Source data | Gas consumption from the building’s meter. |
|---|---|
| Comparison stated | Post-installation consumption compared with the pre-installation year. |
| Reported measure | kWh per degree day, with a reported 20% reduction. |
| Published consumption figures | 30,952 kWh before and 25,165 kWh after. |
| Published degree-day figures | 1,787.2 and 2,176.1. |
| Plant | One 60kW boiler serving a single-storey office. |
The summary describes annual consumption figures alongside an April 2024 to June 2025 reporting window. Confirm the exact baseline and comparison dates, and their treatment in the adjustment, before comparing the raw totals.
The client’s experience
“We have been delighted with the savings to date.”
Clare Baker, Devon Chamber of Commerce
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.
The reported percentage is a degree-day comparison. It should not be read as a simple subtraction of the headline annual consumption figures.
Review your office heating
Share the building type, plant information and available meter readings. An agreed pilot can assess your own operating pattern and heating demand.
Review the installation and measurement plan
Related evidence: Wearebauer Group · All case studies