Electric Heating High rise heat

With many areas turning to high rise buildings to combat ‘the housing crisis’, demand for electric wet central heating boilers is also on the rise. Alan Clarke, Technical Support Manager at Heatrae Sadia, discusses the benefits of these systems and why wholesalers should be recommending them.


espite a slow down in their construction in 2017, high rise dwellings are back on the up this year. In London alone, over 510 buildings of over 20 storeys are either planned or already

under construction, with major high rise residential projects in place for Birmingham and Manchester, too. Previously, central boiler plants and individual gas boilers

have provided heating and hot water in multi occupancy dwellings but there are many reasons why other options should be considered. Firstly, selecting electric over gas means fewer

restrictions, and no flueing, condensate drainage or plumbing issues to consider, which is especially relevant since the guidelines surrounding concealed flues tightened in 2013. Due to recent safety concerns, gas boilers are being removed from many multi-storey buildings to prevent any potential incident occurring, putting an emphasis on the benefits of electric units. What’s more, if the properties in these high rise buildings

are to be rented, the landlord benefits from simplified maintenance, as the need for annual gas safety checks – for which gaining entry to individual dwellings is often problematic – is eliminated.

Electric wet central heating Fortunately, the electric heating market has moved on from the inflexible, largely uncontrollable night storage heaters that it was once associated with. The introduction of electric wet central heating flow boilers changed this market. These products work perfectly with conventional wet radiators or underfloor heating systems which provide central heating on demand. Compact, wall hung and efficient, they are controlled and operated by a programmer and thermostat, working in a similar way to a gas-fired boiler. Our Amptec electric boiler, even modulates in the same way as a gas boiler, improving running efficiency. To supply hot water to all-electric properties, electric boilers can be teamed with direct cylinders. High- performance unvented hot water cylinders, which are fed directly from the cold water mains, will provide the end user with powerful showers and fast filling baths. Our Megaflo Eco can deliver up to 72 litres per minute of

hot water, and there won’t be a significant difference in performance if more than one tap or shower is used simultaneously (depending on the mains water pressure and flow rate coming into the property).

Product selection Most end users will want an electric boiler to be as comparable to a gas boiler as possible, not only in terms of user benefits like controllability but

42 | electrical wholesalerSeptember 2018

also operating life. Low-cost electric boilers will quickly prove to be a false economy, as after just a few years it’s likely they will either need to be repaired or replaced. Some electric boilers can have an operating life similar to a traditional

cast iron gas boiler (which can boast a lifespan of around 25 years). High- quality products that last might cost more initially, but will save the property owner money in the long run, while also providing peace of mind. To ensure that our Amptec boilers have a long operational life, several key

features were designed into the product. For example, we use solid state technology for the switching of the heating elements to ensure a much longer switching life.

The heating elements used in Amptec (pictured left) are designed to run

at low Watts density, which is essential to prolong the boiler’s life. And, we chose copper sheathed elements, as in this particular application they last longer than other materials. In addition to Amptec, Heatrae Sadia has also combined an electric boiler and a hot water cylinder in a ‘one box’ solution. Electromax provides full wet central heating and unvented domestic hot water from one compact unit. Factory assembled and tested, and pre-plumbed, it’s really simple to install. Whilst electric heating was historically considered to be lacking in choice and flexibility, there are a raft of products that are available for when gas is not a viable option in an urban high-rise development. All of which meet the needs of specifiers, landlords and residents.

The introduction of electric wet central heating flow boilers

changed this market. These products work perfectly with conventional

wet radiators or underfloor heating systems which provide central heating on demand.

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