Hall Energy Management
indications that our 80 year old Hall could make energy savings none have
been identified as cost justified although we are always open to this being
During the first half
of 2007, UVH had several telephone consultations with Colin Clark - appointed
by The Carbon Trust - to create a model of the Halls energy consumption so
that potential savings can be quantified.
The model an easy to
use spreadsheet has evolved as assumptions have been firmed or at least
- The Hall is heavily used 9.30am 10.00pm
most days during winter 8mnths. Slightly less during summer 4months.
- Single storey building (built 1928) with
main hall mainly encompassed by other rooms (kitchen / toilets / storage
- Main Hall 16m X 9m with high roof
(probably little roof insulation)
- Gas - costs currently running at around
£3,500 p.a. all to gas boiler.
- Gas boiler for central heating and
sustains a hot water cylinder for meagre draw-off (equiv of less than one
bath-full per week).
- Reasonable assumption that 80% of central
heating for main hall.
- Control system is simple timer with main
hall room temperature and individual radiator thermostats. Room temp
setting only accessible to Building Manager.
- Boiler 25+ yrs old tested to record 83%
gross efficiency. Surprisingly high for age but correct calibration
assured.(previous figure similar)
- Electricity costs currently running at
around £500 p.a.
- Electricity primarily for lighting (mostly
- Through draft via doors/windows while
heating on is fairly well contained given that this is a public facility.
- New double-glazed skylights in main hall
roof. Remote opening and blinds to help relieve heat in summer.
- All windows double glazed.
- Most external walls of used rooms are
insulated with insulted board on single brick walls. Storage walls only
Conclusions from CT
- Our thoughts of installing a new CH boiler with smart controller
and separate on-demand water heater analysed by CT and decision that NOT
justified on savings. Rather recommended to only take this action when
boiler eventually fails. Currently boiler seems very robust and working
well could last many more years.
We had a CCC grant offer of £3000 for this work which we then declined.
- No other energy improvements could be identified by CT.