New boilers and services help Co-op store reduce energy consumption by 12%

Published:  05 January, 2016

Atag Commercial, boiler, space heating, DHW

New Atag Commercial boilers installed at the Co-op store in Stockbridge near Sheffield are reducing energy consumption by 12%, according to initial feedback. The cost of the project is expected to be paid back in just over five years, helped by lower reactive maintenance costs.

The store’s old system comprised a warm-air unit in the ceiling void serving the checkout area, an electric door curtain over the main entrance, and a combined gas-fired and direct-expansion air-handling unit serving the main store. Hot water was provided by a direct cylinder with two 6 kW immersion heaters.

Difficult access for servicing these various system elements resulted in high maintenance costs, and overall energy consumption was high.

The Co-op’s facilities-management team, headed by Brendan Laing examined numerous options. the new system is based around two Atag XL140 gas-fired boilers supplied by Atag Commercial and installed by Climate Heating & Plumbing Services, the main contractor for the work.

These boilers have stainless-steel heat exchangers, seamless upwards modulation and NOx emissions below 30 ppm.

The boilers deliver hot water to a new LPHW air-handling system serving the main store area and a new LPHW warm-air door curtain above the main entrance.

An Atag unvented indirect system with a capacity of 700 l has replaced the previous hot-water system.

Modifications were made to existing ductwork and also to pipework to provide a secondary return with thermostatic mixing valves fitted to all outlets.

The boilers are frame mounted in line and were supplied with low-loss header, pressurisation unit and expansion vessel.

To enable the store’s management to monitor the performance of the heating and hot-water systems and make adjustments ,a remote monitoring and control system was installed. 

For more information on this story, click here: January 2016, 135

comments powered by Disqus



Welcome to Modern Building Services Online, the web edition of Modern Building Services (MBS) journal and the UK's most popular Building Services engineering site. Modern Building Services covers the entire Building Services Engineering industry. This site contains archived content from the journal, plus web-specific content.

When you go to our digital edition, you can also access the archive of digital editions.

Modern Building services has a group
on Linkedin - join us!

Construction Week



  • Field Sales Executive

    Successful professional technical salesperson required to sell to consultants and contractors. Unique opportunity to sell ultra-low energy, patented technology, ventilation products from a UK manufacturer. ...

  • Property Surveyor

    Property Surveyor/ Building Service Surveyor needed to work within the Technical Services team for the management of water hygiene/ legionella risk within DCC's property portfolio. We are looking for an experienced and dynamic team member to join our T......

more jobs »


"Is the Building Services industry lagging behind in the implementation of BIM?"