Reported reduction in energy use per degree day.
Twelve months
Post-installation consumption compared with the pre-installation year.
An individual OH4 installation result. This is not a forecast for your building.
An installation across existing plant
The hotel’s heating and hot water plant is spread across historic buildings and separately serviced apartments. OH4 was fitted in October 2024 to seven boilers across five plant rooms.
The published case study records a three-hour installation with no downtime or disruption to hotel and restaurant operations.
The evidence behind the result
| Source data | Metered gas consumption before and after installation. |
|---|---|
| Assessment period | Twelve months of post-installation data. |
| Baseline | The pre-installation year. |
| Adjustment stated | Degree days, with the result expressed as energy use per degree day. |
| Published consumption figures | 309,221 kWh before and 251,072 kWh after. |
| Installation | October 2024, seven boilers across five plant rooms. |
The original summary also reports 60,659 kWh saved. The consumption totals above do not show that same difference. The raw and adjusted calculation needs to be reconciled by the report owner before that kWh saving is used in a business case. The published 20% per-degree-day result is shown unchanged.
The client’s experience
“The installation process was as seamless as promised”
Peter Stevens, General Manager, The Georgian House Hotel
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.
This page reports a site-specific outcome. Historic expectations or terms mentioned in the source are not a promise for a new installation.
Working with a historic building?
Start with a review of the plant rooms, access and available meter data. Agree the installation scope and measurement method for a pilot.
Review the installation and measurement plan
Related evidence: The Headland Hotel · All case studies