Heating lFrom previous page
dwelling and the ‘landlord’ space – the latter providing easy access for inspection and maintenance. Other pluses for landlords include a first fix rail, meaning that installers can minimise risk of damage or theft by completing the installation of the interface unit only at property handover.
At the same time, products like the
Hi-Max Instant ID are so compact that they can fit in a standard kitchen cupboard, helping to maximise living space where it is at a premium.
What are the benefits? In comparison to the traditional
approach of fitting individual systems within dwellings, there are many benefits to this approach. Annual gas safety checks mean that
any gas appliance poses a never ending challenge for landlords, who are dependent on tenants providing access to their properties. The use of HIUs removes the need to conduct a gas check on the heating system – and, if there are no other gas appliances in the affected properties, could negate the need for individual gas checks completely. The time and costs involved with boiler servicing and maintenance is also significantly reduced. It also reduces the problems associated with supplying gas to multi dwelling buildings, decreasing the risks linked to gas distribution pipework and saving costs, and eliminates the need to fit numerous flue terminals/condensate drainage systems. The capital installation and whole life costs are therefore also reduced. The incorporation of low carbon or
renewable technologies (such as biomass, solar thermal water heating or combined heat and power (CHP)) can be simpler and more achievable, as it can be difficult to incorporate these technologies into individual properties in a multi occupancy scheme – helping designers and specifiers to meet ‘zero carbon’ targets. While the government has recently announced the scrapping of zero carbon targets for 2016, developers will still have to meet zero carbon requirements set by the EU in 2019. The diverse thermal loads offered by multi-occupancy accommodation also presents an attractive demand profile against
carry out a portable appliance test (PAT) in residential rented accommodation*. While the Electrical Safety Council recommends PAT testing to ensure that landlord supplied appliances are safe at the point of letting, the HIU wouldn’t be included as it doesn’t fall under the definition of a portable appliance. Therefore, to ensure electrical
safety, wholesalers, installers, and landlords should look to independent third party approvals of the HIU in order to be sure that they comply with electrical industry standards and regulations. For example, the NEMKO mark demonstrates that the product has been assessed for conformity to electrical safety legislation by a competent body. Equally, independent testing
for water fittings ensures that products are suitable for potable water use, guaranteeing that they are safe to use and will guard against contaminating potable water supplies. Here, the industry standard third party certification is provided by WRAS or KIWA. The Hi-Max Instant ID is KIWA approved and carries the NEMKO
A Heatrae Sadia HIU
which such technologies can be operated to maximise the benefits.
How are HIUs regulated for safety? Reports suggest that electricity causes more than 20,000 accidental domestic fires in the UK each year. As a result, installers should help to educate their customers as to the importance of ensuring that all HIU installations are electrically, as well as hydraulically, safe. Currently, fixed wiring installations in new
build properties are required to comply with Part P Building Regulations, and management regulations for multi-occupancy properties require landlords to arrange for a qualified electrician to inspect and test fixed electrical installations every five years. However, while this would cover the ring main from the fuse box – up to and including the sockets and fused spurs – it does not cover the HIU itself. Meanwhile, there is no legal obligation to
N mark. It features a low energy pump and fully modulating pressure independent flow control technology for automatic balancing and fine temperature
control, and the scale reduction feature keeps the appliance low maintenance. Units come complete with a factory set of
55ºC for domestic hot water and 60ºC for the heating circuit, standardising usage for tenants. A two speed pressure independent controller output prevents overshoot of the temperature set point, ensuring more stable control of temperature, and an integral pulsed bypass function kicks in during periods of no heating to ensure that the HIU is quick to respond when it is eventually used. Suitable for single and dual zone heating
systems, the HIU can be specified in new build properties where building regulations require a minimum of two space heating zones.
www.heatraesadia.com
*The exception being if an employee is working or living in the property
Reports suggest that electricity causes more than 20,000 accidental domestic fires in the UK each year. As a result, installers should help
to educate their customers as to the importance of ensuring that all HIU installations are electrically, as well as hydraulically, safe.
18 | electrical wholesalerSeptember 2015
www.ewnews.co.uk
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