PRODUCT REVIEW
“Overall, it is essential that we consider what level of safety and performance is needed within both domestic and commercial settings.”
scheme, effectively maintaining a constant and safe temperature. The Mixcal III has been designed especially for centralised or group systems, which demand high flow rates, for example with multiple outlets such as showers and washbasins. The TMV3 scheme applies to thermostatic mixing valves for use in high-risk commercial healthcare applications within the UK. These valves offer a high level of protection, reacting much more quickly in shutting off the flow of water if the cold water fails, or a safe temperature is exceeded. Testing bodies must ensure that the valve adheres to the NHS D08 regulatory standard, which provides stable temperature output despite varying supply pressures and temperatures. Altecnic recommends: The WRAS approved 5213 Merchant TMV is TMV2 and TMV3 compliant. It has been specifically designed and manufactured to meet the requirements of the latest NHS model engineering specification – D08 and BS 7942 for use in care homes. This versatile TMV adheres to both TMV2 and TMV3, making it suitable for both domestic and commercial applications. TMVS AND LEGIONELLA The recommended temperature range for delivery of safe hot water where a TMV is installed is: 39C to 43C. The maximum mixed water outlet temperatures for both TMV2 and TMV3 valves are outlined in the table below:
The conflict between delivering water at safe temperatures and fighting off harmful legionella bacteria should always be taken into consideration with TMVs. Water should be stored below 20C or above 60C to prevent the growth of legionella bacteria, which can be extremely harmful and even fatal if exposure occurs. As TMVs allow for high-temperature water storage, the risk of bacterial growth is reduced. However, it is not eliminated altogether. The location of the TMV plays an important role here. Any space between the TMV and outlet where blended water is stored provides a breeding ground for such bacteria. For this reason, it is recommended that: • TMVs are installed as close to the water outlet as possible, mixing water at the point of use where possible • Multiple TMVs should be used in the case of multiple outlets; the use of a single TMV increases the risk of bacteria growth. Overall, it is essential that we consider what level of safety and performance is needed within both domestic and commercial settings, whether it is TMV 2 or TMV 3. The Altecnic range of TMVs is designed for high flow rates that group applications require, and are guaranteed to meet the requirements of the relevant TMV scheme. Altecnic, the UK’s leading supplier of hydronic solutions and part of the Caleffi Group, has expanded its product range once again with the addition of the highly anticipated SILFRA Commercial Washroom range. The range embodies the typical high quality associated with the Altecnic brand, bolstered by the SILFRA 5-year warranty. The SILFRA Commercial Washroom range includes taps, showerheads, flow controls, thermostatic regulators and thermostatic mixing valves alongside the existing shower fitting kits.
Mixcal III TMV2 approved.
5213 Merchant Mixing Valve: TMV2 and TMV3 WRAS approved.
Maximum temp. Application setting (°C) 44° for bath fill
(46° for assisted filing)
41°
shower
38°
bidet
For more information, contact Chris Reilly, Country Manager for Ireland, on 00353 85 2152288 or e-mail chris.reilly@altecnic.co.uk or Gary Swann, Northern Ireland Sales Manager on 07760 596727 or e-mail gary.swann@altecnic.co.uk or visit the website at www.altecnic.co.uk
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