Regulated and unregulated energy consumption
![]() |
Contents |
[edit] Introduction
A building’s energy consumption varies considerably according to the building’s function. Its total operational energy usage comprises regulated and unregulated energy. BREEAM broadly defines regulated and unregulated energy consumption as follows:
[edit] Regulated energy
‘Regulated energy is building energy consumption resulting from the specification of controlled, fixed building services and fittings, including space heating and cooling, hot water, ventilation, fans, pumps and lighting. Such energy uses are inherent in the design of a building.’
Designers may not be able to predict how the services and fittings will be used but they can design them to be as energy efficient as possible.
NB The Home Quality Mark One, Technical Manual SD239, England, Scotland & Wales, published by BRE in 2018 defines a regulated energy as; ‘…building energy consumption resulting from the specification of controlled, fixed building services and fittings, including space heating and cooling, hot water, ventilation and lighting.’
[edit] Unregulated energy
Unregulated energy is building energy consumption resulting from a system or process that is not ‘controlled’, ie energy consumption from systems in the building on which the Building Regulations do not impose a requirement. For example, this may include energy consumption from systems integral to the building and its operation, e.g. IT equipment, lifts, escalators, refrigeration systems, external lighting, ducted-fume cupboards, servers, printers, photocopiers, laptops, cooking, audio-visual equipment and other appliances.
Some buildings can have unregulated energy accounting for 50% of total energy use.
Unlike regulated energy use, unregulated energy consumption is usually only determined very late in the design process; it can also vary throughout the building lifecycle. This is because buildings may have different occupants or uses.
NB The Home Quality Mark One, Technical Manual SD239, England, Scotland & Wales, published by BRE in 2018 defines a unregulated energy as; ‘…the energy consumption of the home that is not ‘controlled’, i.e. energy consumption from aspects of the home on which Building Regulations do not impose a requirement. For the purposes of the HQM assessment, this includes energy associated with lighting, appliances and cooking.’
[edit] Building regulations
Designers usually demonstrate compliance with Approved Document L of the building regulations as evidence of a building’s energy efficiency. But this does not fully reflect reality, as regulated energy is only a part of the total. Although they can usually predict regulated energy usage, it becomes more difficult with unregulated energy as predicting user behaviour can be problematic. This means that designers should not be held accountable for total operational energy usage as it is something they can only partly influence.
[edit] Related articles on Designing Buildings Wiki
- Approved document L.
- BREEAM.
- Building Regulations.
- Energy performance certificates.
- Leadership in Energy and Environmental Design (LEED).
- New energy retrofit concept: ‘renovation trains’ for mass housing.
- Operational carbon.
- Performance gap.
- The code for sustainable homes.
[edit] External references
- Bonfield review.
- Energy Saving Trust.
- EU Energy Efficiency Directive.
- Part L (Conservation of fuel and power).
- Planning Portal – Energy Saving.
Featured articles and news
New Great British Energy partnership launched
Crown estate help to turbocharge energy independence.
ECA Industry Awards 2024 shortlist revealed
22 leading businesses from across the electrotechnical and engineering services sector.
Government unveils Skills England strategy
Skills England to transform opportunities and drive growth.
New Government Hub for York Given Planning Green Light
For up to 2,600 civil servants, due for completion by 2028.
Construction Skills Certification Scheme cards
July update on Professionally Qualified and Academically Qualified Person Cards.
BSRIA Briefing 2024, November 22
Sustainable Futures: Redefining Retrofit for Net Zero Living.
The CLC on driving competency in the retrofit sector
Previously published roadmap on skills for net zero.
The first labour government King's speech in fifteen years
Construction industry reactions, support and some concern.
CIOB Retrofit of Buildings Technical Information Sheet
What retrofit is, the approach to be taken and processes to be followed.
Adapting Historic Buildings for Energy and Carbon Efficiency
Historic England advice note 18, free download published.
10 retrofit projects revisited 10 years after completion.
Information orders, building liability orders and SPVs
Key BSA terms and how they impact special purpose vehicles.
Listed despite problems with its design.
Zen and the art of cycling exploration.
Design Council Homes Taskforce launched
To support government 1.5 million homes target within UK climate commitments.