HENSALL | Group of Building Services Companies |
T: +44 (0) 1977 661 318 | E: info@hensall.com


We are experts in advising, sourcing and installing sustainable building services solutions.

Our specialist engineers are fully conversant with the complicated calculations required to meet stringent sustainability requirements, specialising in sustainable, low-carbon solutions.

We have specific expertise in both lighting and air conditioning refrigeration design and performance. Both of these account for the bulk of energy waste and consumption in commercial buildings.



Our design engineers & project managers are all experienced in working within projects where low carbon solutions are required in order to achieve Part L Building Regulations compliance and / or BREEAM accreditation.

If clients involve us in the early concept stages of the project, our technical expertise will assist when trying to achieve BREEAM excellent status.

We use state-of-the-art BIM software that allows us to provide clients with the most practical, cost-effective, sustainable solutions while always having an eye on your return on investments and payback periods.


Some of the sustainable technologies that we are experienced in the design, installation & commissioning of are:

• Air Source Heat Pumps
• Ground Source Heat Pumps
• Biomass Boilers
• PV Arrays
• Solar Collectors
• Rain Water Harvesting


BREEAM, or ‘Building Research Establishment Environmental Assessment Methodology’, is the world’s foremost environmental assessment method and rating system for buildings. There are 250,000 buildings with certified BREEAM assessment ratings and over a million registered for assessment since it was first launched in 1990. It sets the standard for best practice sustainable building design.

BREEAM has become one of the most comprehensive and widely-recognised measures of a building’s environmental performance. It encourages designers, clients and others to think about low-carbon and low-impact design. This minimises the energy demands created by a building before considering energy efficiency and low-carbon technologies.

A BREEAM assessment uses recognised measures of performance, which are set against established benchmarks, to evaluate a building’s specification, design, construction, and use. The measures used represent a broad range of categories and criteria from energy to ecology. They include aspects related to energy and water use, the internal environment (health and well-being), pollution, transport, materials, waste, ecology, and management processes.


We are committed to saving energy to help mitigate climate change by designing and/or installing intelligent, flexible building management systems, complete with the latest energy monitoring and control equipment available on the market (all in compliance with building regulations).

These systems offer the end user flexible control of building services systems and can massively reduce energy bills. We strive to provide cost-effective ways of implementing an energy monitoring package which allows remote analysis of energy use to identify areas of overspending or saving.


These are now primary issues and in many instances form planning consent qualification.

Noise and sound breakout is a complex subject and may require consultancy back-up to establish structural detail. We have carried many studies and projects with sensitivity in this area and may be able to assist if you have unanswered questions.

Odour and smoke, particularly from kitchens, is a principal concern in many city centre areas. Inevitably the treatment of such problems can prove costly, and ecology systems do require detailed design work.


The Enhanced Capital Allowance (ECA) scheme enables businesses to claim a 100% first-year capital allowance on investments in specific energy-saving equipment, against the taxable profits of the period of investment.

Capital allowances enable businesses to write off the capital cost of purchasing new plant or machinery, such as boilers or motors, against their taxable profits. For more information on capital allowances, please see HMRC’s page on tax relief for capital allowances.

The general rate of capital allowances is 18% a year on a reducing balance basis. Some technologies supported by the ECA scheme are included in a special capital allowances pool where the general rate of capital allowances is 8%.

Why should you purchase ECA qualifying energy-efficient technologies?

By doing so, you unlock additional benefits such as:

  • Improved cash flow
  • Ticking certain corporate social responsibility (CSR) boxes
  • Lower energy bills
  • Reduction in Climate Change Levy or CRC payment

For more information on how ECA can be implemented in your project, consult our iBEMS team.