Commercial boiler supplement Hoval
Address: Hoval Limited, Northgate, Newark, Nottinghamshire NG24 1JN, UK Tel: 01636 672711 E-mail:
boilersales@hoval.co.uk Web:
www.hoval.co.uk
Product name – fuel type – boiler type – output range – maximum gross effi-
ciency – NOx emissions* Hoval TopGas - Gas/LPG - Wall -hung condensing gas fired boiler with integrated premix burner - 35-80kW (TopGas boilers 45, 60 and 80 available in cascade format up to a max output of 480kW) - 96.4% (50/30°C) - <40mg/ kWh - W x H x D (mm) 620/950/465 to 700/940/565 Hoval UltraGas - Gas/LPG - Floor- standing condensing gas fired boiler with integrated premix burner - 15-2000kW - 97.4% (50/30°C) - <40mg/kWh - W x H x D (mm): 576/1400/820 to 3120/2169/2538 Hoval UltraOil - ultra low sulphur oil - Floor-standing condensing oil fired boil- er with integrated burner - 16-600kW - 98.9% (50/30°C) - <110mg/kWh - W x H x D (mm): 520/1575/820 to 2260/1600/3284 Hoval CompactGas - Gas - High efficiency floor-standing gas fired boiler with matched burner - 1000- 2800kW - 87% (80/60°C) - <80mg/ kWh (with a low NOx burner firing on gas)- W x H x D 1330/1646/2430 to 1730/2188/3745 Hoval Uno-3 - Dual Fuel (gas and oil) - welded steel shell floor-standing boiler - 110-360kW - 85.7% (gas) 89.7% (oil) - 60-70mg/kWh (with a low NOx burner firing on gas) - W x H x D (mm) 780/1255/1520 to 910/1563/2147
Hoval case study
Supporting critical environmental control for the National Gallery
High efficiency boilers from Hoval are helping the National Gallery in London reduce its energy consumption and carbon footprint, while maintaining a stable internal environment for the exhibits. The National Gallery opened in 1838, occupying a dominant position in Trafalgar Square at the very centre of London. The original building has been extended several times since then and now houses the national collection of paintings in the Western European tradition from the 13th to the 19th centuries.
The National Gallery has a strong commitment to sustainability,
with ongoing initiatives to improve energy efficiency and reduce carbon emissions. In support of this policy, a decision was made to replace the existing boiler plant and consulting engineers hurleypalmerflatt were commissioned to design a more efficient solution.
Nigel Back of hurleypalmerflatt explained: “The base heat loads at the National Gallery are met by a combined heat and power (CHP) unit but the existing back-up boilers were oversized for meeting the additional heat loads, resulting in inefficiencies. We therefore designed a system that would be more efficient and responsive, while also providing the resilience required to maintain the critical internal environment.
“Having reviewed a number of manufacturers, we specified Hoval as providing the optimum combination of efficiency, reliability and best value,” he continued.
The new system, installed by contractors Capri Mechanical, uses two UltraGas condensing boilers as lead boilers, supplementing the CHP plant at times of peak demand. Using a pre-mix modulating burner with up to 12:1 turndown, the UltraGas boilers are able to respond efficiently to variable heat demand while taking advantage of condensing opportunities for even higher efficiency when return water temperatures permit.
© National Gallery,
In addition, three dual-fuel SR-plus boilers have been installed to ensure that heating can be maintained to protect exhibits in the event of interruption to the gas supply. In parallel, the heating system has been reconfigured, replacing the existing single circuit system with a primary circuit and several secondary circuits to provide better control.
Hoval SR-plus - dual fuel (gas and oil) - Welded steel shell floor-standing boiler - 144-4150kW - 83.8% (gas) 87.1% (oil) - dependent on matched burner Hoval Max-3 - dual fuel (gas and oil) - Three pass, steel shell and tube floor-standing boiler - 500-3000kW - 85.3% (gas), 88.9% (oil) - <80mg/kWh - W x H x D: 1190/1435/2178 to 2003/1980/4032 Hoval BioLyt - Floor standing com- mercial wood pellet biomass boil- er - 15-160kW - 84.5% - <150mg/ MJ - W x H x D 991/1474/954 to 895/2050/2675 Hoval STU - Floor standing com- mercial wood pellet biomass boiler - 195-975kW - 84.5% - <150mg/MJ - W x H x D 1200/2250/3850 to 1540/3122/5612 THW-I NT E - dual fuel (gas and oil) - Floor standing commercial low temperature high output boiler with three pass finned wall - 1500-20000kW - 93% - W x D x H dependent on model Titan-3 LT - dual fuel (gas and oil) - Floor standing commercial low tem- perature high output boiler with three pass wet back design - 3000-10000kW - 92% - W x H x D dependent on model THW-I HT E - dual fuel (gas and oil) - Floor standing commercial high and medium temperature high output boiler with three pass finned wall - 500- 20000kW - 91% - W x H x D depend- ent on model
(TopGas, UltraGas, UltraOil, BioLyt,
CompactGas, Uno-3, Max-3 and SR-plus can be operated in cascade via the TopTronic T control system to a max of 5 boilers. TopGas can cascade up to 6 boilers with a specialised controller)
Installation aids available Skid-mounting kits Augers Flue kits Stokers
Controls available Cascade control Sequencers Integrating controls
Other products available Solar thermal systems Thermal storage vessels/cylinders CHP Heat Interface Units (HIUs)
Unique selling points One-stop-shopping: Hoval
provides a wide range of products which could easily be integrated into the heat- ing system. Tailored solutions from a single supplier in which all of the neces- sary system components are strategically coordinated and compatible mean that products can be optimally and efficiently integrated in the overall heating system. In line with our holistic approach, Hoval offer total support from start to fin- ish including design, installation advice, commissioning and service contracts.
Quality: Research and develop- ment is the lifeblood of Hoval. By creating the best engineering teams we have; in many instances, been able to lead the market. This is particularly so in respect to high efficiency/pre-mix/low NOx boilers. In Switzerland (the strict- est European enforcer of emission limits for commercial/industrial plant) these factors have made Hoval equipment the first choice of many specifiers. Reliability: Lifecycle costing has become a key issue and Hoval’s long trading history gives customers full con- fidence in the extended guarantees often required on such schemes. We have supplied boilers and related equipment to a wide spectrum of clients in both the public and private sectors. Prestige clients include many famous names in the field of sport, leisure, retail, edu- cation establishments and government departments. Additionally, as supplier to Buckingham Palace, Windsor Castle and many other Royal Palaces, Hoval is proud to hold the Royal Warrant to HM The Queen as Boiler Manufacturers and Engineers.
Brief company history Country of origin: Liechtenstein Founded in: 1945 Established in the UK in: 1961 No. of employees in the UK: 113 Group turnover: £14m in the UK Mission statement: Responsibility for energy and environment
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Supplement to HVR | September 2014 | 13
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