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HPM October 2012

GREENCOMMENT WWW.HPMMAG.COM Got a story? Ring us on 01732 748041 or e-mail twood@unity-media.com The Green Deal is missing a trick The UK pump industry is stepping up its attempts to have circulator pumps included in the government’s flagship Green Deal programme, says Gary Wilde, of Lowara Applied Water Systems UK... Ttechnologies, A-rated circulator pumpshe government’s Green Deal is potentiallyrevolutionary for the UK’s housing stockand while the programme covers a host of have been excluded due to the use of inaccurate SAP ratings from the Building Research Establishment that are being used to judge the merits of this product. The decision to exclude circulator pumps from such a significant legislative change is raising eyebrows among key players in the pump industry, who are working together through the British Pump Manufacturers Association (BPMA) circulator group to advise the government on the positive impact energy efficient circulators could make to the UK carbon reduction targets. Circulator pumps in buildings are used primarily for pumping water in central heating systems and they range in size from 25W-2500W. There are two types currently in operation. The stand alone circulator which is separate from the boiler and typically within a domestic setting has a power of 65W. There is also the boiler integrated circulator which has a typical power consumption of 90W. In combination, approximately 960,000 circulators of both types are sold in the UK every year. The Lowara Ecocirc can reduce electricity costs by up to 90% compared to traditional fixed three-speed pumps POTENTIAL ENERGY SAVINGS that estimated savings on bills must always equal thermostatic radiator valve has been closed down Overall, there are an estimated 140 million or exceed the cost of the work and they can be and will automatically slow the pump down. In circulators in the EU with a total energy usage of readily fitted by the UK’s installer base. effect, the pump recognises that there is less 53.2 TWh per annum. According to a study by With the creation of an approved government resistance in the pipework and, therefore, needs AEA Energy & Environment, which assessed three checklist for estimated savings by house type, it is less power. types of circulator, namely improved standard certainly possible to provide a mechanism for This is a product rather than system approach circulators, variable speed induction motor heating installers to quote for this type of work to domestic heating efficiency, but a boiler on its circulators and variable speed permanent magnet and provide access to Green Deal finance. own does not provide efficiency benefits. When a motor circulators, the potential energy savings Unfortunately, the pump industry has hit a boiler is being replaced under the Green Deal, are huge. brick wall in trying to persuade the Department the minimum requirement should be that the AEA estimate that energy savings of 13.0 TWh of Energy and Climate Change (DECC) that system is also brought up to the good practice per annum could be achieved by 2020 if the circulators should be included. level required under Part L, for example, the minimum energy performance of standalone DECC, armed with incorrect SAP figures installation of heating controls, water treatment, circulators that can be sold is class A* which calculated for the Building Regulations 15 years high efficiency pumps, and hot water cylinder equates to an Energy Efficiency Index (EEI) of ago, has taken the view that circulators are not insulation. This is justified by ensuring cost between 0.20 and 0.30. Energy savings of 1.8 sufficiently energy efficient to merit inclusion. effective energy efficiency improvements are in TWh pa can be achieved by 2020 by making class These figures do not take into account the place as a boiler repair does not in itself B compulsory, which equates to an EEI of technological advancements made by the automatically provide the sort of efficiency between 0.40 and 0.60. pumping industry in that time. For example, a benefits that will be required by the householder Based on this information, if every UK traditional fixed three-speed circulator with an and the Golden Rule. household was to replace an inefficient 120W induction motor would require 77 watts of Evidence is available that utilisation of circulator with a high efficiency model we could power. However, modern circulator pumps modern circulator pump technology can make a afford to close an entire coal-fired power station. follow the system curve much more efficiently. A very significant contribution to domestic energy It is clear, therefore, that the replacement of new electronic circulator does not put power into saving and the Green Deal. Its exclusion on the inefficient circulator pumps offers a great the motor to rotate the shaft and can, therefore, basis of inaccurate SAP ratings could potentially opportunity for domestic energy saving. reduce the maximum power to between six and cause damage to the British pump industry. What’s more, the inclusion of circulator 35 watts. pumps achieves many other key Green Deal What’s more, modern circulators are equipped criteria. It would help deliver the Golden Rule with in-built software which can sense when a enquiry number 119 18 OCTOBER 2012 HEATING & PLUMBING MONTHLY


HPM October 2012
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