058 HPM 1012

HPM October 2012

TRAINING/TECHNICAL WWW.HPMMAG.COM Got a story? Ring us on 01732 748041 or e-mail twood@unity-media.com Time to lower water consumption The National House Building Council and the government don’t appear to be singing from the same song sheet over the next impending set of Building Regulations. Martyn Bridges, of Worcester, Bosch Group explains... Awill come into force that have an impact, thermal technology or even a heat pump. which could quite conceivably be a“For example, in a single bathroom property,than decreasing the flow rate available in aproperty.However, 2016 is still a good few years offeffectively will see water collected in a storagecylinder before it is then heated by solars the UK’s heating industry awaits thearrival of the next set of BuildingRegulations, it is expected that changes and in particular a limitation, on the maximum and with water consumption currently set at a one-bedroom bedsit, the NHBC is demanding a allowable water consumption a person is rate of 125 litres per person, per day, for new water flow rate capable of delivering 15 litres per allowed. This is likely to be on maximum build, it is evidently a big drop to 85 litres per minute of water. In combi terms, that would be consumption of certain water using products, i.e. person, per day and, therefore, a challenging at least a 37kW combi to provide the necessary toilet cisterns, as well as possible flow rate decrease for the industry as well as the hot water flow rate for that property, which is reductions at outlets. homeowner. Reducing water flow rates from just daft and a total contradiction to the way Unquestionably, the next rewrite of the taps and other outlets is all well and good, but trends in the general Building Regulations are Building Regulations will seek further consideration still needs to be given that there going. improvement in housing efficiency for all is a minimum and sufficient flow water rate It is also confusing for installers who don’t properties built from 2013 onwards, with the available to activate certain appliances, know what to do for the better, depending on ultimate aim of achieving a zero carbon standard including the humble combi boiler. whether it is an existing or new build property. by 2016. “Most combi boilers require a minimum of For an existing property with one bedroom As a result, it is expected that the amends will three litres of water, a minute, flowing through and one bathroom, an installer will commonly call for properties built from next year to be 44% them to be able to activate the flow switch to fit a 24kW combi that delivers a flow rate of more efficient than that of a house which was energise the boiler. Reducing flow rates down approximately 8.5 litres per minute. Yet with a built in line with the 2006 Regulations. to two litres per minute, runs the risk that the new build property, the NHBC requires a 37kW Hand in hand with improving the energy boiler may cease to operate at such low rates. boiler is fitted into a family house with two consumption and fabric of a property, the Therefore, manufacturers have been actively bathrooms. government has woken up to the fact that it involved in negotiations and discussions to The ultimate result is that manufacturers are would be a foolhardy tactic to also ignore ensure that flow rates of no lower than around uncertain of what they are supposed to be reducing the hot water requirements of the four litres per minute and are set as a designing and producing at a time when we’d property at the same time. parameter within any rewrite of the regulations. like to be more forward thinking. This is evident through the Code for It’s ironic really, given that when combi boilers There should be some alignment with the Sustainable Homes, a publication that in a way were introduced the water output was, to a NHBC and the Building Regulations. I would like forewarns of changes to Building Regulations. certain extent, quite limited and the industry to see the NHBC work alongside the national Under Code Level 6 there are currently moves was met with criticism that wall-hung boilers trend of conservation, rather than requesting we afoot, which will recommend that water didn’t deliver the flow rate that customers offer a flow rate which is almost double that of consumption in a new build property should be expected and were used to experiencing. the level which most households live quite set at 85 litres per person, per day. However, the biggest gripe from within the capably with. With combi boilers fitted in 13 Some of this reduction will be achieved, of industry is that recently the National House million households already, we have an course, with water recycling. I believe as 2016 Building Council (NHBC) – one of the largest infrastructure which the majority are perfectly approaches, it will also be possible to reduce overseers of new properties in the UK – has content with. Therefore, it would appear that the water flow rates in the instances where there is placed requirements on housebuilders to install NHBC is not in tune with the national no boiler to energise, for example where the combi boilers that deliver flow rates far in consensus. water is heated by a renewable source. This excess of this particular trend, increasing rather enquiry number 141 Training school selects DRU Kamara wall heater to keep students warm RF Training owns and operates its own City and Guilds accredited training centres in Birmingham and Manchester. The company delivers plumbing courses, electrician training, and gas courses, specialising in foundation courses for new entrants to the trades and those upgrading their skills. Both RF centres are equipped and fitted out to the highest of standards. They benefit from large open plan workshops for practical training, dedicated classrooms for theory training and IT suites. Having moved to the Jubilee Centre in Birmingham in 2011, RF Training had to find a heating system for its main classroom. There was no central heating, so the challenge was to find an efficient standalone solution that was capable of heating a spacious room with high ceilings. Gas training manager, Trevor Daniels, drew upon his experience in the heating trade and selected a DRU Kamara 16 powered flue gas wall heater. All Kamara heaters have the option for an extended vertical or horizontal flue system, which was necessary in this installation to comply with the latest Gas Safe flue termination regulations. The heater has forced air convection for rapid warm up time and is complete with integral thermostatic control. enquiry number 142 58 OCTOBER 2012 HEATING & PLUMBING MONTHLY


HPM October 2012
To see the actual publication please follow the link above