High energy use can quietly increase the running cost of a building. An office may have air conditioning running for long hours, lights that are rarely switched off or equipment that uses more power than expected. Sometimes, the problem is not obvious because several systems contribute to the total energy use.
An Energy Audit helps property owners understand where energy is being used and where improvements may be possible.
Instead of guessing why electricity costs are high, an energy audit looks at the building, its equipment, operating habits and energy consumption. The results can help owners decide which changes are worth making and where savings may be possible.
What Is an Energy Audit?
An energy audit is a detailed review of how a building uses energy.
It involves an analysis of the major energy-using systems of the building, along with identifying any inefficiencies or waste associated with their operation.
The energy audit may include investigation of the following elements, depending on the nature of the project:
- HVAC system
- Lighting
- Electrical equipment
- Building controls
- Ventilation
- Pumping equipment
- Water heating
- Insulation
- Operating schedule
- Electricity consumption
The aim is not simply to find equipment that uses electricity. It is to understand how, when and why energy is being used. This information can then be used to identify practical improvements.
Why Are Energy Audits Important in Dubai?
Air conditioning is a major consideration for buildings in Dubai because cooling is needed for much of the year.
A building with poorly performing HVAC equipment, incorrect temperature settings or inefficient controls may use more energy than necessary.
Other systems can also add to energy consumption. Lighting, pumps, office equipment, ventilation systems and other electrical loads all contribute to the building’s total use.
An energy audit gives the property owner a clearer picture of these different sources.
It can be particularly useful for:
- Offices
- Retail properties
- Hotels
- Residential buildings
- Industrial facilities
- Commercial buildings
- Mixed-use developments
What Happens During an Energy Audit?
The exact process depends on the building and the level of audit required. However, most audits involve several basic stages.
1. Collecting Building Information
The first stage is typically the collection of data regarding the building.
The auditor can analyze the following documents:
- Blueprints
- Electric bills
- Equipment data
- Hours of operation
- Occupancy data
- Past maintenance data
- Information on HVAC system
- Energy data
This helps the auditor understand how the building functions.
2. Inspecting the Property
The next step involves looking at the building and its systems.
The auditor may inspect air conditioning equipment, lighting, electrical panels, pumps, controls and other systems that affect energy consumption.
They may also look for simple issues such as equipment running when it is not needed, poor controls, blocked filters or lighting being used in empty areas.
The purpose is to compare how the building is supposed to operate with how it actually operates.
3. Measuring Energy Use
Where required, measurements can be taken to understand how different systems are performing.
This may include checking electrical loads, temperatures, operating conditions or other relevant information.
The measurements help provide a more accurate picture than relying only on utility bills.
For example, two buildings may have similar electricity bills but very different reasons for their energy use. One may have high cooling demand, while another may have inefficient equipment.
4. Identifying Energy-Saving Opportunities
After collecting information, the auditor looks for areas where improvements may be possible.
These could include:
- Improving HVAC performance
- Replacing inefficient lighting
- Adjusting temperature controls
- Improving operating schedules
- Upgrading equipment
- Improving building controls
- Reducing unnecessary energy use
Not every recommendation requires a major upgrade. Sometimes a change in operation or maintenance can make a difference.
What Factors Affect Energy Audit Cost?
There is no single price for an energy audit. The cost depends on several factors.
1. Building Size
A small office requires less time to inspect than a large commercial or industrial property with several floors and multiple systems.
Larger buildings usually require more inspection, data collection and analysis.
2. Number of Systems
A building with basic electrical and HVAC systems may be easier to assess than a property with complex cooling, ventilation, pumps, controls and other equipment.
The more systems involved, the more detailed the audit may need to be.
3. Level of Audit
Energy audits can be carried out at different levels of detail.
A basic assessment may identify obvious areas of energy waste. A more detailed audit may involve additional measurements, system analysis and financial calculations.
The level required depends on what the property owner wants to achieve.
4. Data Availability
If electricity bills, equipment records, drawings and operating information are readily available, the audit process may be easier.
If information is missing or outdated, the auditor may need to spend additional time collecting and checking data.
5. Building Type
An office, hotel, warehouse, retail store and residential building all have different energy patterns.
For example, a hotel may have continuous cooling and hot water requirements, while an office may have higher energy use during working hours.
The building’s purpose can therefore affect the amount of work involved.
What Can You Expect to Receive After the Audit?
A professional energy audit should provide more than a general statement that a building is using too much electricity.
The final report may include:
- Current energy-use information
- Findings from the site inspection
- Areas of inefficient operation
- Recommended improvements
- Estimated energy-saving opportunities
- Suggested upgrades
- Priority actions
- Possible cost considerations
The exact contents depend on the audit scope. A useful report should help the property owner understand what should be improved, why it matters and what the next step could be.
Final Thoughts
Energy audits are one of the practical ways in which one can learn how energy is consumed in buildings and hence where the potential for improvement exists. Energy audits can include looking at data about buildings, checking equipment, taking measurements, finding inefficiencies and recommending changes.
The price of an audit depends on the size of the building, the system complexity, the type of audit and the amount of data that needs to be collected. Property owners in Dubai should consider an audit before any big investments.
8 PM Engineering and Contracting supports clients across Dubai and the UAE with engineering services that cover areas such as MEP design, refurbishment, fit-outs, testing and commissioning, maintenance and engineering consultancy. With a better understanding of how a building’s systems operate, property owners can make more informed decisions about energy improvements and long-term building performance.