Thursday, 3 November 2011

Energy Audit - Checklist

Energy Audit Quick Checklist

(Recent Updates of 06th April 2015 - below)

Energy Audit Checklist gives an overview of Preliminary Energy Audit of a Facility. This refers to the basic data capturing for assessing the present status of Energy Efficiency. This Energy Audit checklist is only for a quick assessment and not a detailed Energy Audit. For a detailed study Our Energy Audit experts from this field who are IIT-B alumnus and B.E.E. Certified need to make a comprehensive Energy Saving Plan for Energy Optimization.

This is NOT a Energy Audit Questionnaire. To download Energy Audit Questionnaire please Click Here.

a)         Lighting:-

♦    Is your facility using the most energy efficient lighting options (fluorescent mercury vapor, etc.)?
♦    Are there areas that have excessive or unneeded lighting?
♦    Are you making effective use of available lighting, such as natural sunlight?
♦    Have you installed lighting management equipment such as dimmers, timers and sensors?

b)         Building Envelope:-
♦    Is the building well insulated?
♦    Does weather stripping around doors and windows need to be replaced?
♦    Are cracks around doors, windows and foundations properly sealed?
♦    Are there open doors around loading docks or other frequently accessed areas?

c)         Heating and Cooling:-

♦    Arc   furnaces,   boilers   and   air conditioning systems   operating efficiently?
♦    Is there a regular maintenance and update schedule for these systems?
♦    Are filters replaced regularly?
♦    Is the building properly ventilated?

d)         Motors and Equipment:-

♦     Is your equipment maintained so that it is operating at maximum efficiency?
♦     Is equipment load compatible with manufacturer specifications?
♦     Are machines shut down when not in use?
♦     Are fan belts at the proper tension and in good condition?

e)  Energy Behavior:-
♦     Are   lights, fans   and   equipment (computer, printers, etc.) turned off when not in use?
♦     Are building temperatures set back when not in use?
♦     Are thermostats set to higher or Lower than necessary in summer and winter?
♦     After finding answers to the check list   and   identifying areas   of improvement, following possibilities maybe   explored   as   energy conservation measures.

f) Lighting-:
♦     Reduce Hours of Operation.
       -    Occupancy Sensors, Photocells,
                        Central Control.
♦     Reduce Capacity of Equipment.
                   -    Delamping, Reflectors.

♦     Reduce Load or Equipment Capacity.       
                   -    Day lighting.

♦     Reduce Energy Cost.
                   -    Base demand load reduction.

♦     Increase Efficiency
                   -    T-12 to T-8
                   -    Incandescent to Fluorescent
                   -    Reflectors
                   -    Dimmers          

g) Building envelope:-
♦     Insulation
                   -    Insulation of roof & walls.

♦     Glass modifications-:
                   -    Use of permanent/movable shading on glass
                   -    Changing to low solar heat gain glass, insulating (low U-value) glass

♦     Reduce air Leakage-:
-    air lock entry
-    plugging all leakages

[Others are also reading - Top 5 Reasons to carry out Energy Audit]

h) Heating-:
♦     Reduce Hours of Operation-:
                   -    Automated Controls.
♦     Reduce Capacity of Equipment-:
-    Size to meet actual load
      ♦     Reduce Load or Equipment Capacity-:
                        - Insulation
                        - Infiltration reduction
♦     Reduce Energy Cost-:
                        - Fuel Switch
                        - Rate Switch
                        - Direct Purchase Gas
♦     Increase Efficiency-:
                        - High Efficiency Boilers           
                        - High Efficiency Furnaces

i) Air Conditioning
                   ♦   Reduce Hours of Operation-:
                        - Automated Controls
                        -  Economizer
                   ♦   Reduce Capacity of Equipment-:
                        - Size to meet actual load
                        - Chiller Loop

                   ♦   Reduce Load or Equipment Capacity-:
                        -           Insulation.
                        -           Infiltration reduction.
                   ♦   Reduce Energy Cost-:
                        -           Rate Switch.
                        -           Thermal Storage.
                   ♦   Increase Efficiency-:
                        -           High Efficiency Chillers.
                        -           Variable speed tower fans.
                        -           Geothermal Heat pumps.

[Recent popular article - Can Energy Conservation help fight Global Warming?]

j) Fans and Pumps-:
                   ♦   Reduce Hours of Operation-:
                        -           Automated Controls.
                   ♦   Reduce Capacity of Equipment-:
                        -           Size to meet actual load requirements.
                   ♦   Reduce Load or Equipment Capacity-:
                        -           Insulation.
                        -           Infiltration reduction.
                   ♦   Reduce Energy Cost-:
                        -           Reduce base demand load through right sizing fans and pumps.
                   ♦   Increase Efficiency-:
                        -           CAV to VAV conversion.       
                        -           CP to VP conversion.

k) Renewable Energy Potential

Evaluating potential for Renewable Energy especially Solar Energy for Power generation. This is because of immense benefits of PV Solar over other technologies, especially modular and scalable nature.

Updates on 06th April 2015
While energy-intensive Industrial plants are taking all possible steps to improve on Energy Conservation and Energy Efficiency one point worth mentioning is that the Energy Audit concludes with the Energy Audit Report submission.The end-user is left to implement the energy conservation and energy efficiency measures on their own., which is the general practice.

However the key to complete the cycle of Energy Audit is to implement the solutions and recommendations made in the Energy Audit Report. Without which the entire exercise of Energy Audit is rendered futile. There could be 2 possible scenarios under this -
  1. The plant / end-user Company may invest in the energy saving recommendations on their own. This is the general practice all across India in 99% of the cases.
  2. The energy audit Company invests in these recommendations and shares the benefits of Energy saving with the plant on ESCO basis.
The advantage of ESCO model is immense and it can enable a plant to save on energy immediately without any investment. We invite your comments / queries / feedback below this article.

Enerco Energy Solutions LLP offers ESCO based Energy Audit primarily for Industrial plants across sectors. This includes B.E.E. PAT Energy Audit, Periodic Energy Audit, B.E.E. PAT M&V assignments. Similarly we also offer 100% funded Solar Energy projects on BOOT basis.

To know more you may simply send a mail to


  1. Dear Sir,

    Thank you for this meaningful article. Energy intensive industries will find it useful.

    Based on your experience could you please highlight major energy saving potential areas in a typical plant?

    Thanking you,

    1. Dear Mr. Suhas,

      Thank you for your comment and query.

      The answer is quite subjective as energy saving potential in a plant would depend on many factors primarily the type of plant, age of plant, energy conservation measures already undertaken, time since last energy audit etc.

      If we look at the process side there can be immense opportunities identified for electrical as well as thermal energy saving. This could be carried out by a domain or a process expert.

      On utilities side, which are generally common to many plants, energy conservation opportunities are available in air-compressors, pumps, boilers etc. For eg. for one of our Clients we merged compressed air operations for 2 units into 1 unit and re-designed the compressed air distribution layout. This resulted in 55% energy saving in compressor section.

      It would help to know your plant details before we can comment on the areas for energy conservation. If you would like to understand the potential energy saving in your plant, please send us a mail to info [@] econserve [dot] in

      Thanking you again.