Energy audit checklist (v1.4 september 2014)

Template Questions

• Description of site operations:
• Site Pictures:
• Personnel involved:
• Auditor(s)
• Comments:
• Executive Summary of findings:
• Are there any lights left on where there is no-one in the area?
• Worth checking areas like store cupboards and plant rooms and external storage sheds where there are
• Are external lights only on during hours of darkness? (eg perimeter lights, car parks, external storage sheds etc)
• Too much light wastes energy, and too little can be dangerous so both situations should be answered "
• Is lighting low energy? (Low energy tubes a NF starters for florescent lighting, LED, low energy bulbs etc)
• Replacement of tungsten filament bulbs with compact florescent tubes, use of high frequency florescen
• Are light coverings clean and not discoloured?
• Switches should be labelled to allow only the relevant lights to be switched on or switched off to he
• Are there movement sensors on lighting to ensure it is off when there is no activity?
• Actions from the LIGHTING Section
• Action required
• Action by:
• General heating and cooling
• Consider reducing thermostatic settings in areas which do not require a full comfort eating.Typical s
• Money is wasted when windows and doors are opened when the heating is on. Turning down heating can in
• Thermostatic controls often abused by being used as on/off switches. This can result in discomfort fo
• This is extremely important, especially after refurbishment and machine movements etc. Siting a therm
• For example heat from uninsulated pipework and similar sources makes air-conditioning equipment work
• Portable Electric heaters are expensive to run and, as portable heaters are usually not fitted with t
• Running extraction fans during periods when rooms are not occupied is generally not necessary and was
• Process heating or cooling
• Actions from the HEATING/COOLING Section
• Action Required:
• Action By:
• Are there any signs of leaking water taps or taps which are not turned off properly?
• Puddles which refuse to dry up are indicative of underground pipe leakage, and drips from pipework at
• Is the temperature of the hot water set to just over 60 degrees Centigrade? (AND NO HIGHER) - too low or too high should be "No"
• Many companies overheat the hot water - every 10 degrees Centigrade reduction in hot water temperatur
• Are hot water systems turned off during holiday periods and shut downs?
• Uncontrolled urinals normally flush every 20 minutes often wasting money. Controllers limit flushing
• Do WC cisterns hold only 7 litres of water or have a dual flush device?
• It is very inefficient use mains water once for cooling purposes and it wastes money. Consider using
• Are there any signs of leaks for the hot water heating system?
• Adequate ventilation equates to all louvres and vents open and not obstructedRestricting the supply o
• Are hot water heating systems serviced regularly?
• Actions from the WATER Section
• Action:
• Do staff keep windows and doors closed when heating is used
• Unused doors and windows can be sealed. Windows and doors which are used should have proper seals and
• Is there any sign of damp?
• Damp causes damage to the building infrastructure and severely reduces the insulating properties of b
• Are all external doors fitted with door closers
• Also consider rooflights and glass roof areas where heat losses could be considerable
• Is there solar film (or treatment) on windows subject to direct sunlight and where there is air conditioning
• Heat is gained through windows not fitted with solar treatments, and the additional heat means that t
• Are external walls insulated?
• Actions from the BUILDING Section
• Is the electricity consumption baseload (total minus the production load) known? Is it known where this consumption comes from?
• Domestic/Non-productive consumption:
• Process related consumption:
• This should include motors used for hydraulic systems, cooling systems, compressed air, extruders, pu
• Running a VSD drive at 40 Hz for example saves half the energy
• Oversized motors tend to run at reduced efficiency when running at lower loads (requires measurement
• This should include, but is not limited to: conveyers, hydraulic pumps (check VSD is functional), lat
• Actions from the ELECTRICAL Section
• Are items using compressed air isolated when not in use?
• Automatic water drain taps, valves (or manual drain valves), connections, pipework, cylinders on equi
• Is unused compressed air pipework isolated?
• Unless correctly isolated, redundant runs of pipework have to be pressurised each time the line is pr
• Is compressed air generated at the minimum required pressure?
• Typical pressures are 7 bar or higher. If pressure is reduced by 1 bar, then costs can be reduced by
• Are compressed air guns operating at low pressures?
• Operating blow guns to 2bar (30psi) from the 7bar normal pressure, will reduce operational costs by 6
• Are air compressors running continuously?
• When there is no demand for air then compressors should shut down, they should be turned off during s
• Is the air intake for compressors taken directly from outside?
• Compressors operate more efficiently using cool air, this could reduce operational costs by up to 3%
• Is the air treatment system regularly inspected and maintained?
• Are compressor air inlet filters and pre/post filters regularly cleaned and replaced?Are condensate t
• Are compressed air tools used?
• Compressed air tools are significantly more expensive to run than the equivalent electrical tool
• Is the air receiver large enough?
• Undersize air receivers result in frequent compressor loading and unloading
• Is the heat generated by the compressor recovered or used?
• 90% of the energy used by a compressor is turned into heat
• Actions from the COMPRESSED AIR Section
• Additional comments and/or observations
• Issue
• Add media