Energy Auditing - a service that pays for itself


Energy AuditingEnergy Audit

Hotel - Industrial - Commercial

In any industry, consumption of natural resources costs money. If your organisation does not run plant at maximum efficiency then you will be wasting money.

An Energy Audit by AEM gives a detailed review of your organisation’s Electricity, Fuel and Water usage. By applying basic engineering principles our consulting engineers examine the mechanical and electrical systems in all areas of the business and look for ways to improve efficiency. This could be maintenance, replacement with efficient alternatives or re-design of an out-dated system. (Note, we do not sell or market any products).

We aim to find significant savings in many areas and use our deep experience to identify opportunities often missed by in-house teams.

CAP 610
Hong Kong commercial premises must be audited as required by Chapter 610 - BUILDINGS ENERGY EFFICIENCY ORDINANCE - Cap 610. AEM’s Registered Energy Assessors and Licensed Carbon Auditors audit your air conditioning, electrical, lighting systems to determine your level of compliance. We can help with guidance on remedial actions.


The AEM Energy Audit

We apply our history of building services design and maintenance and our 15 years of energy related consultancy to commercial and industrial projects across the Asiatic region

AEM approaches each engagement to examine all areas of your physical business with fresh eyes and a wealth of experience.


We can use advance data to provide an overview of the site and plan site time. We will look for details of the property, usage and occupation rates, layout, historical energy and resource consumption, system diagrams, equipment lists etc.

The Audit

We will bring our team to conduct a detailed survey. Typically lasting several days our survey team works with the Site Maintenance team and all members of staff.

Key areas of energy and resource consumption will be examined, such as the following examples.


Supply, distribution and backup systems
Consumption - lighting, public areas, rear of house, guest accommodation, support plant and equipment, water features, heating etc.

Air Conditioning and Ventilation
Heating, cooling and integrated design

Gas and Fuel
Kitchen use, generator and boilers


Potable supply
Hot water supply and distribution
Steam laundry services
Pumping and water features
Pools and Jacuzzis, their operation and systems

Compressed air, ovens
hydraulics, cooling systems

All site-specific aspects are considered. For high rise buildings lift systems efficiency would be examined. In older sites lifecycle of plant brings opportunity to choose efficient replacements. Some facilities are contained in a single building offering opportunities for centralised services, whereas highly spread sites will face challenges with distribution.

A key part of the AEM service is to consider engineering design and implementation. We have knowledge to assess if a system is operating correctly and with the most efficient configuration. We have experience to recommend alternative approaches providing realistic costs for change.

AEM will look for opportunities to identify alternative means of saving energy. For example heat output from one system can often be recovered into a nearby system. Flat roofs form ideal situations for solar heating and electricity generation.

The Report
Engineering reports

Our reports are designed to be used by in-house teams and senior management to understand the audit’s findings and plan improvements. The Executive Summary gives compact high-level overview with a summary of potential savings by area and payback times for proposed solutions.

Analysis of resource usage patterns from historical data allows regression analysis to uncover trends. A full breakdown of energy cost helps form the basis of estimated savings.

Following the intensive on-site audit inspection we analyse each use area and identify savings. We are able to provide costs for each modification we suggest and provide a realistic ROI figure.

The report is fully illustrated with graphs, images and appendices to back up our recommendations. An ordered Action Plan gives recommendations in order of ease of implementation allowing low hanging fruit to be tackled first.

The Follow-Up

As an engineering consultancy we supply assistance for design and implementation of items resulting from the audit.

We are keen to ensure that the report does not get "filed". As part of the engagement we can arrange to return after 6 months for a 1 day review to investigate and discuss progress.

Audit review

In the longterm we aim to build a relationship with each client for Energy Management. Ongoing monitoring of energy performance brings year-on-year savings. Using us to verify supplier claims and designs before implementation ensures correct systems are installed. Engaging AEM to perform testing and commissioning will result in systems running at maximum efficiency.

This is a core service that AEM supplies across industries including manufacturing and the hospitality sector.

A summary of the benefits of having AEM as your Energy Management Partner:

  • Systems implemented right first time
  • Reduced energy usage - greater profitability
  • Better use of existing equipment - longer lifecycles
  • Improved focus on design and implementation
  • Staff awareness of energy saving practices
  • Opportunity to demonstrate your commitment to Sustainability and the Environment!

AEM Hotel Energy Auditing

Sustainability is a recognised need by hotel groups worldwide - most have published Policies and communicate Policy. There is a cultural shift towards managing resources in an effective and ethical way and maximising profitability by operating in an energy efficient way.

AEM understand the unique environment and pressures in the hospitality industry. We have carried out audits for a number of major chains, including Four Seasons, Swissotel, Raffles, Swire and Mira. Customer experience is vital. Resources must be available to guests in a seemingly effortless way. We have experience to safeguard and improve these key characteristics and find major savings and efficiencies.

Hotel sustainability

Recognition is growing that everyone must make efforts to improve sustainability and it is important that the effort by hospitality industry is visible and significant.

This has been understood by many hotel chains. Many schemes and approaches are available. For example, the IHG group has an impressive Green Engage scheme which provides guidance and resources for its member hotels. Other Hotel groups use schemes such as HCMI, ISO 14001, Earth Check or LEED. ISO 50001 provides a useful framework to control Energy Management effort

Any hotel property or resort, long established or newly commissioned, offers many energy savings opportunities without affecting guest experience. This is particularly true in high-end sites where designs are focused on the 'look and feel', with little consideration for economy.

Following the advice made in an AEM Energy Audit brings cost reductions and significant marketing opportunities communicating successes to customers.

AEM has adopted the Hotel Carbon Measurement Initiative (HCMI) measurement methodology as a means to ensure consistency and allow direct comparison of results across individual sites and hotel chains.


HCMI 1.1 is a standard tool to allow the measurement of the carbon footprint of an individual hotel stay or meeting. Over 15,000 hotels around the world have adopted the Hotel Carbon Measurement Initiative methodology that allows the carbon footprint of hotel stays and meetings to be calculated and communicated in a consistent and transparent way.

By examining the use of energy in all its forms in a standard fashion across hotel and resort sites it is possible to determine the actual footprint per guest. When combined with our Energy Audit service it is possible to illustrate the gains that could be made from adopting out measures and will also provide a mechanism to track the hotel’s performance over time.

For more information on the HCMI scheme you can visit the WTTC website.

There are several competing schemes that hotel chains can consider adopting: HCMI, ISO 14001, Earth Check, Project Planet or LEED to name but a few. All of these will examine the performance and efficient of the hotel in detail and, unless sustainability was designed in from the very start, there is a certainty that issues will be uncovered.

AEM has developed the concept of

Ready for Sustainability

Prior to formal assessment a pre-audit specific to the chosen measure is performed to highlight potential problems and areas for improvement.

By looking at the current situation and comparing to the standard to be adopted, gap analysis is used to highlight the actions that would need to be taken to meet the important criteria.

Ready for Sustainability

Typical Coverage of an Energy Audit

Water supply plant

Lighting and controls


Catering ventilation and
air conditioning

Hot water plant

Tube harvest

A/C heat rejection

Steam and laundry

Water features

Spa savings

Outdoor lighting

Power usage

Working with the in-house
maintenance team

Pool filtration and heating

A/C controls

Guest visibility of
decorative features