CORSHAM DIGITAL MANSION
Remeha Quinta Pro high-efficiency condensing boilers have been selected to supply reliable, quiet, energy-saving heating at Wiltshire Council’s new digital hub in Corsham.
The hub is situated in Corsham’s Mansion House, a previously vacant, landmark building in Corsham town centre that now provides small units, meeting rooms and break out areas for local digital start-up businesses.
The historic, Grade II-listed property has been sensitively refurbished, and a new glass-fronted extension added to house the main entrance, flexible working spaces and a large informal meeting area.
Providing a comfortable, energy-efficient working environment throughout this new annex are two Remeha Quinta Pro 30 boilers. The boilers feed into the underfloor heating on the ground floor and supply radiators and radiant panels on the upper floors for space heating.
Bristol-based MJD Mechanical and Electrical Services Ltd, working for principal contractor Beard Construction, explained the benefits of installing the Remeha Quinta Pro boilers.
“Efficiency is a key priority for the Council,” said MJD’s Contract Manager/Estimator, Kris Hudd. “We recommended fitting Quinta Pro boilers as we find them consistently reliable and efficient. With their higher-than-average operational efficiencies, they were the best solution for this project as they will help keep bills low at Corsham Digital Mansion while delivering the required high-performance heating.”
Space was a major concern due to a number of unexpected challenges within the new plant room.
“The plant room design had to be reduced at the build stage, so we found that we had less available space to work with than originally anticipated,” continued Kris. “The requirement to run a ladder from the plant room to the roof brought further space constrictions as we effectively lost an entire wall. Fortunately, the Quinta boilers are incredibly compact, which helped us overcome these potential restrictions.”
The plant room is located in the middle of the extension, so quiet operation from the boilers was an essential consideration for the new office environment.
“Low noise was an important factor as the plant room is effectively in the centre of the office space,” said Kris. “But we were really impressed by the Quinta boilers which boast a quiet operation of 46 dB.”
The project went well with the Quinta Pro boilers connected to a Building Management System at the final stage for optimum performance. The BMS is controlled by Wiltshire Council from their head office to ensure maximum operational efficiencies.
The Quinta Pro wall-hung condensing boiler range delivers high gross seasonal efficiencies of 95% for greater than average energy savings, combined with ultra-low NOx emissions. Its extremely compact design makes it suitable for individual installation or as part of a multi-boiler cascade or rig system.
The Quinta Pro is suitable for use on sealed systems and open-vented installations and perfect for both new and retrofit installations. This popular wall-hung boiler series is available in a wide range of outputs – 30kW, 45kW, 55kW, 65kW, 90kW and 115kW – and for use with natural gas or LPG. A variety of cascade and bespoke-designed rig options are also available to enable faster installation of multiple Quinta Pro boilers in compact, space saving configurations.
QUEEN ELIZABETH’S HOSPITAL SCHOOL, BRISTOL
Installation: 5 x Gas 220 Ace + plate heat exchanger on an off-site fabricated cascade system School selects Remeha boilers on a bespoke off-site cascade system to improve heating efficiency Queen Elizabeth’s Hospital (QEH) School in Bristol, has successfully improved the reliability and efficiency of its heating provision with the installation of five Remeha Gas 220 Ace floor-standing condensing boilers on a space and time-saving, off-site fabricated cascade system. One of the country’s leading independent schools, QEH is also one of its oldest, having existed since 1590. Its current home is a magnificent Grade II-listed building in Clifton that dates back to 1847. When the two ancient cast-iron sectional boilers serving the main building came to the end of their serviceable life, QEH were keen to act fast to replace the dated boiler plant during the summer shutdown period.
Replacing ageing or inefficient boilers with high efficiency condensing boilers is one of the most cost-effective solutions to achieving significant energy, cost and emission savings. And as it can be carried out without adversely affecting the existing fabric, it is a particularly effective approach to improve energy performance in listed buildings like QEH, where consent is required for any major improvements.
Consultant Geoff Beaven, previously of the Brodie Partnership, specified installing five Remeha Gas 220 Ace boilers with a Plate Heat Exchanger (PHE) on an off-site fabricated cascade system to meet the heat output demand in an exceptionally compact footprint.
“The nature of the listed school building meant that floor-standing boilers were required to meet the high 1,250kW heat demand,” explained Geoff Beaven. “But we were also working to a tight schedule, as the whole project needed to be completed within the fixed summer holiday period. We selected the Gas 220 Ace boilers for their high efficiencies and reliability, and also for the Remeha off-site fabricated cascade options that would enable a faster, smoother installation.”
A key advantage of using off-site fabrication heating techniques is that the unique requirements of the project and the site can be addressed and overcome at the outset.
Working with Geoff Beaven and project contractors Hewer FM, Remeha prepared 3D drawings of the boiler cascade arrangement to the specified layout and integrated a PHE into the design.
PHEs are increasingly applied to refurbishment projects to achieve hydraulic separation between the boiler circuit and the heating circuit and so optimise boiler performance and longevity.
The detailed drawings provided all stakeholders with early visualisation of the layout. Only once the design is clearly identified does production take place in a factory environment, with end-of-line testing providing added quality assurance.
Once the equipment was delivered to site, Hewer FM bolted together the boilers and connected them to the existing system. John Cowdery at Hewer FM said: “The off-site cascade was a good solution. Space was tight in the plant room, but as the cascade had been designed specifically for this project, it fitted in well and connected together very easily.”
Geoff Beaven added: “The off-site cascade arrangement with PHE worked brilliantly. It was just what we needed, meeting all the project requirements and ensuring a speedy installation.”
Given the listed status of this historic building, careful consideration was required when it came to the flueing arrangements for the condensing boilers. Sarah Bryant, Estates Bursar at QEH explained: “The original flue was a bit of an eyesore as it came out of the front of the building and curved back in one of the towers. We sought listed consent to adjust it and route the flue internally. It was a sensitive project that required the skill of a structural engineer to cut through the brickwork supporting the tower and a specialist mason to make good. But it’s actually enhanced the appearance of the building.”
“The flueing did present an interesting engineering challenge,” agreed John Cowdery at Hewer FM. “But it was a hurdle we successfully overcame by adding supporting steels to the original flue through the chimney before dropping the new flue in sectionally.”
Installing multiple advanced condensing boilers in a cascade arrangement is a highly effective means of meeting a building’s heat demand – resulting in greater efficiency, improved reliability and more straightforward future maintenance.
At QEH, the new Remeha boilers have been serving the whole of the main building, as well as eight science labs, additional classroom blocks and the music and art buildings since the autumn. In that time, not only have comfort levels risen within the five floors of the school building, but initial data is already pointing to significant gas savings due to the higher efficiencies of the fully modulating plant.
On projects like this, using bespoke-designed, off-site fabricated equipment can bring advantages for the entire supply chain. QEH, for one, is benefitting from more efficient, more reliable heating – and lower heating costs – following minimal disruption. The Consultant has a flexible solution to meet all specification and customer requirements. And the Contractor benefits from reduced on-site time and high-quality installations, for happy customers.
Available in a wide range of outputs, the fully-modulating Gas 220 Ace series delivers higher-than-average gross efficiencies of up to 98% with ultra-low NOx emissions. It is supplied with onboard time and temperature controls, with direct connection to a Building Management System provided as standard to maximise heating efficiency.
Aermec have launched a new range of R32 refrigerant reversible air/water heat pumps.
Dimplex’s Edel Hot Water Heat Pump cuts Jersey homeowner’s bills by 80 per cent
The Dimplex Edel air source hot water heat pump has proved its credentials as an exceptionally efficient, easy to install and cost-effective renewable water heating system for one resident on the island of Jersey. Upgrading his outdated immersion heater to a Dimplex hot water cylinder was all it took for Adrian Hadley to cut his electricity bill by almost 80 per cent - saving him nearly £300 a year.
The Dimplex Edel hot water cylinder is a unique system which uses an integrated high-performance
compressor to extract energy for hot water production from the external air using insulated duct work. Based on a miniature air source heat pump, the Edel delivers renewable heating directly into the cylinder and uses up to a third less electricity than direct acting water heaters.
The resident said: “The Dimplex Edel is simply amazing and I’m shocked at how cheap it is to run.
The results were instantaneous from the point I upgraded the heating system. The average price for heating water on the old immersion heater was around £30 per month; last month, I paid around £6.30. That’s a saving of more than £288 across the year or a reduction of almost 80 per cent!”
IMPERIAL COLLEGE, LONDON
A new cooling & ventilation system has been installed at a world-class London university library – thanks to Airsystems & Waterloo. The major project to address climate control in the college’s central library started in 2017. Due to the number of library users an energy efficient, quiet and aesthetically pleasing solution was needed. Specialists from Waterloo were invited to discuss the project, which included the installation of a chilled beam and a VAV system. Andrew Mildon, sales office manager at Airsystems (SW) Ltd says “The installation and performance has proven to be a great success at the central library at Imperial College London. The library is now nearly fully occupied following the project”. As part of the re-fit, new furniture & PCs were installed, 3 extra Study Rooms created and power was supplied to all desks. Designers believe the recently finished refit has enhanced the learning resource for decades to come.
ST BARTHOLOMEW’S HOUSE, BRISTOL
Installation of 2 Hydronic AHUs. Airsystems stripped out 2 existing AHU’s, delivered 2 new Hydronic AHU’s in flat-pack form, transported them via lift and stairs through a single door to Plant Room and rebuilt them.
Positioning and site bolt-up of Hydronic AHU. Airsystems organised the offloading, cranage and positioning & site bolt up of AHU on roof, 5 storeys up.
Project Sophia, Exeter
Working with IntoHeat, the mechanical contractor for this 600-bed student accommodation scheme in Exeter city centre, Hattersley have supplied the general and commissioning valves for the plant room shown, domestic LTHW and CHW services.
Bristol International Airport
Bristol International Airport has gone through many changes and enhancements over the last few years and Air Systems as a local company is proud to have been involved in these improvements to the East Terminal Extension, West Terminal Extension, Baggage Handling and Immigration Hall. Air Systems has provided. Air Handling Units, Fan Coil Units, VAV Boxes, Grilles, Diffusers, Heat Recovery Units, Coils as well as cranage and site bolt up.
COMBIflo keeps up with fitness enthusiasts at Imperium Gym
When Ben Hay and Ben Wadham set up a gym in a small 1000sqft unit, their client base expanded rapidly. More space was required, so with a bit of help from Ben’s father Steven Hay, they set out to create a purpose-built gym like no other, and asked Andrews Water Heaters to provide a hot water solution that would help them achieve this dream. Imperium Gym in Plymouth is not your average run-of-the-mill fitness centre. It offers everything including a state-of-the-art cardio, strength and fitness suite, a full functional fitness area and coached classes. The gym is home to Plymouth’s Cross-Fit workout sessions amongst other functional fitness training programmes. The gym was the dream of ex-marine physical training instructor Ben Wadham and brought to life by Ben Hay and his family. It started in a 1,000sqft building. Within one year, membership had increased to 100 people. To cater for the rise in demand, Ben and his father Steve worked with local contractors to create an 8,000 sq ft purpose-built unit. Apart from dedicated equipment and space for Crossfit, Strongman and gymnastics training, there is also a café next door for those who wish to replenish their energy levels after a workout.
During the early stages of the new gym’s development, Ben and Steve sought the services of Zack Davey’s team at Uni Gas, not only to connect the property up to the mains gas supply, but also to install a solution which would supply space heating and hot water to both the gym and the café.
Because gym-goers prefer to exercise in a cool space, space-heating requirement in the large industrial unit is low. However, with ten showers, eight washing basins and a kitchen, demand for instantaneous hot water is much higher.
“My original plan was to install a boiler cascade with a series of cylinders, but this wouldn’t have been energy efficient for the gym,” Zack explains.
“After discussing hot water usage patterns with Ben and Steve, it became clear that during weekdays, peak shower times are before and after working hours, so typically, between 7-8.30am and 6-7pm. At weekends, many members like to go to the gym in the morning between 9.30-10.30am. The café normally needs hot water about 20 minutes after members finish their workouts and go there to grab a bite to eat or a drink.”
Armed with this insight into the gym’s hot water usage, Zack challenged Amanda Symons, Area Sales Manager for Andrews Water Heaters, to provide a solution. She recommended a COMBIflo 150/300 unit, and supported her proposal with a specification report produced using the Size-it tool. It contained calculations and estimates of the flow rate and volume of hot water required across the premises, to show that the specified Andrews water heater would meet the gym’s needs.
Amanda explains, “For this type of application where demand for hot water is higher than space heating, the COMBIflo provides a simple solution. With three burners, the COMBIflo can modulate between periods of high and low demand to supply hot water and heating more efficiently, lowering the gym’s energy bills throughout the whole life of the product.”
Andrews Water Heaters’ COMBIflo is a gas-fired condensing stainless steel water heater which provides hot water and space heating from the same unit. Available with either two or three gas fired heat exchangers, it delivers a virtually instantaneous supply of up to 2,240 litres per hour of hot water (at a 50°C rise) or 150kW of space heating.