HEAT NETWORKS


Rethinking residential masterplanning for low-carbon comfort


Heating, hot water and comfort cooling need to be considered at the masterplanning stage of any large scale residential development, and not left until the design stage, argues David Patrick.


David Patrick www.dimplex.co.uk


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Head of specification marketing at Dimplex


n today’s regulatory and environmentally focused landscape, energy is a core factor of the masterplanning phase. For energy managers and decision-makers involved from the earliest stages of a development, this represents a big opportunity. The transition away from gas, combined with rising concerns about summertime overheating, means that electric heating, hot water provision and low-carbon comfort cooling must be planned at an early stage.


Getting this right from the outset has clear operational and financial implications, as developments which embed a consistent energy strategy at masterplan level are better positioned to control capital expenditure. In turn, this avoids costly redesigns and delivers predictable in- use energy performance. For energy managers working within housing associations, local authorities or private developers, that predictability is even more important, both to support reduced resident energy use and to meet ever-evolving decarbonisation targets. Electric heating and cooling


systems offer clear advantages for carbon reduction and future regulatory compliance, however a critical early step is engaging with Distribution Network Operators (DNOs) at the masterplanning stage. Accurate load modelling at this point allows the full electrical demand of a site, including heat pumps, hot water systems and any cooling provision, to be understood and planned for. Leaving this conversation until later in the design process risks costly grid reinforcement works, programme delays and, in some cases, fundamental changes to the energy strategy.


The overheating challenge Alongside heating and hot water, comfort cooling is becoming a key issue for residential design in the UK. Rising summer temperatures,


EIBI | JULY � AUGUST 2026


Case study The Silvertown regeneration in East London is fast becoming a benchmark for low-carbon residential design. The development is leading the way by demonstrating how integrated energy systems can be specified at masterplan and building levels to deliver efficient, comfortable homes at scale. One key part of this ambitious project is the integration of Dimplex’s Zeroth Energy System. This innovative system supports E.


ON’s ectogrid low-carbon district heating network, creating a resilient energy solution suitable for modern urban living. Silvertown has a bold vision to


The installation of a Dimplex Zeroth energy system


combined with the higher levels of airtightness now required under Part L and the upcoming Future Homes Standard, mean that overheating risk is simultaneously a planning concern, a Part O compliance issue and a reputational one for developers and housing providers. The challenge, familiar to energy managers across all building types, is to address cooling demand without resorting to energy-intensive systems which may undermine decarbonisation goals. In a residential context, this means passive and low-carbon measures must be integrated into the design from the start. Building orientation, glazing ratios, external shading, and landscape design all influence peak cooling demand and are important masterplan decisions. In turn, low-carbon comfort cooling


technologies must be part of the same early conversation as heating and hot water. Specifying them in isolation or retrofitting solutions after residents are using the property is


more expensive, disruptive and less effective.


Policy alignment The proposed Future Homes Standard and tightening local planning policies are the biggest changes the industry has ever seen. A site-wide approach to electric heating, hot water and comfort cooling allows project teams to coordinate fabric performance with renewable energy generation, such as solar PV and smart energy management systems that optimise consumption across the development. This holistic strategy supports


compliance, improves occupant comfort and helps reduce in-use energy bills, which are outcomes that matter to both housing providers addressing fuel poverty and private developers protecting brand reputation. From a programme perspective, early energy planning reduces risk and helps to control both capital and operational costs over the long term.


The Silvertown development in East London has demonstrated the potential to deliver low-carbon heating solutions at scale


be net-zero carbon by 2025, carbon neutral by 2030 and absolute zero carbon by 2040, aligning with the London Borough of Newham’s wider sustainability targets. Meeting these milestones will


be achieved through the smart integration of low-carbon technologies across the development, which will ultimately deliver thousands of homes alongside commercial and leisure spaces. For Plot 6, the first phase of


residential delivery, the Dimplex Zeroth Energy System provides highly efficient, low-carbon space heating and hot water to 106 affordable homes using an ambient loop maintained at around 25 °C. Connected to in- apartment heat pumps, this communal network delivers excellent overall efficiency and can be specified to include comfort cooling, helping mitigate overheating risk and meet regulatory expectations. The integration with E.ON’s ectogrid district network enables energy sharing between buildings across the Silvertown site. As a 5th-generation heat network, ectogrid operates at low temperatures and can draw on local low-carbon sources and waste heat, reducing reliance on external inputs while balancing heating and cooling demands throughout the community. For energy professionals,


Silvertown illustrates the design potential of integrating low-carbon heating, hot water and comfort cooling early in the design process. By embedding these technologies from masterplan through to detailed delivery, Silvertown sets a replicable precedent for sustainable urban living in the UK. ■


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