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Three technologies helping improve sustainability in housing

Ben Malton looks at three technologies that housing providers across the country and abroad are using to improve their portfolio's sustainability.

With sustainability increasing in importance both on a local and at a national level, it’s worth keeping up to date with the latest technologies helping to improve sustainability in the affordable housing market.

Some of these technologies are new to the market, and some have gained an increased relevance because of the pressing need to improve the energy efficiency of properties without compromising on the comfort of the resident. This is especially important in times such as these where the average wage is not keeping pace with the increasing price of energy. The UK is on the verge of a fuel poverty crisis, so any sustainability measures implemented should always be considered in the context of the effect they will have on the health and wellbeing of the dwelling’s residents.

Ground Source Heat Pumps

This particular technology has existed for many years with its first application in the United States in 1945, with Europe following in the 1960s. This technology is, however, gaining some serious ground due to its huge sustainability implications. A ground source heat pump works by absorbing heat from the ground and transferring it to a building. For an average house, approximately 100 meters of pipework is installed in the ground surrounding the house in loops. Once buried, the pipes are covered over becoming invisible and causing no other issue for the residents. Water with antifreeze is then pumped through these pipes absorbing the heat from the ground. This liquid is then pumped into a compressor where the heat is transferred to the water inside the homes central heating system. This system is hugely sustainable, as it is a closed-loop requiring minimal maintenance. It does still generate some carbon emissions from the energy required to run the pump, though this is significantly less than traditional heating systems and with the added benefit of no on-site emissions. Add in a local green energy supplier, and the system has no carbon footprint. Ground source heat pumps are now being deployed by many different social housing providers including Anchor Hanover, Flagship and Trent and Dove Housing.

ground source heat pumps are great for sustainability

Heat Recovery Ventilation (MVHR)

A heat recovery ventilation system works very similarly to a standard centralised ventilation system, except that the heat that is traditionally lost is transferred and pumped back into the property. A heat recovery ventilation system works by extracting warm and damp air from a home, drawing in air from outside and then passing both of these airflows through a heat exchanger. This takes up to 90% of the heat from the outgoing humid air and transfers it to the new, lower-humidity air coming from outside. This essentially prewarms the air entering the property. The heat exchanger units are usually located in the attic of properties with concealed ducting leading to vulnerable areas of a property. Air filtration is also commonly built into these systems reducing the wellbeing penalties for those with allergies and pollen sensitivities. These systems have been around for a while now – but are again gaining prominence due to the critical issue of fuel poverty. The energy cost of running a heat recovery ventilation system is significantly less than the required energy to reheat a property to the appropriate temperature – benefitting the resident through reduced relative humidity without the energy cost.

heat recovery ventilation combats the common issues with ventilation

Smart Thermostats

Smart thermostats are another huge area of expansion for sustainability teams looking to improve the energy efficiency of their portfolios. Smart thermostats work by observing and learning a resident’s daily patterns and optimising the heating around them. In practice, this means turning the heating up and down at certain times of the day to improve the comfort levels of residents without wasting heating during periods where residents are not present. This means that the heating is on at a comfortable level when they wake up but goes off when they go to work or go to sleep. This technology is possible because of the rise of low-power connectivity chips that allow internet of things devices to communicate without the traditionally high energy costs. Smart thermostats benefit sustainability goals because they optimise heating systems and improve energy efficiency for a relatively low capital cost. This allows a far greater proportion of a housing providers portfolio to be covered than more expensive sustainability options. They benefit from economies of scale.

Technologies are developing to ensure housing providers have options for improving energy efficiency and sustainability

These and a host of others are helping to ensure housing providers are given the tools they need to reach aggressive decarbonisation targets – without impacting their resident's wellbeing or comfort level. After all, the most important thing for an affordable housing provider is to provide their residents with a home they feel comfortable and safe in.

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