Heat pumps impose fundamentally different demands on the electrical infrastructure. We design and deliver the grid connections, circuits, and coordination required to make them work.
Every heat pump infrastructure project follows a clear, auditable sequence. Here is exactly what happens at each stage.
Air source heat pumps (ASHPs) draw 3 to 8kW under normal conditions and can spike to 12kW or more during defrost cycles. Their coefficient of performance (CoP) typically ranges from 2.5 to 4.0 depending on ambient temperature. Ground source heat pumps (GSHPs) use horizontal collector trenches or vertical boreholes and achieve a higher CoP of 3.0 to 5.0 because the ground temperature is more stable than ambient air. GSHP installation requires substantial civil works that must be coordinated with the site groundworks programme. Water source heat pumps achieve very high CoP values of 3.5 to 5.5 where a suitable water body is available, but require consent from the Environment Agency.
Heat pumps impose fundamentally different demands on electrical infrastructure compared with gas heating. An ASHP per dwelling adds 3 to 8kW of connected load. For a development of 50 plots, this represents an additional 250 to 400kW of electrical demand compared with a gas-heated equivalent scheme. This demand must be explicitly modelled in the DNO load assessment. Standard domestic diversity factors used for gas-heated schemes understate the actual peak demand from heat pump-dominated developments, which can lead to undersized grid connections that require costly reinforcement after occupation.
Each ASHP requires a dedicated circuit from the consumer unit, correctly sized and protected for the unit's rated current. The cable must be sized for both the normal running current and the compressor start-up surge. Smart grid-ready interfaces are increasingly required so that heat pump demand can be managed in response to grid signals. USP designs and installs individual ASHP circuits as part of the wider electrical installation for the development, ensuring correct cable sizing, protection, and smart metering compliance from the outset.
Where a centralised heat pump array serves a district heating network, the electrical connection is made at plant room level on a commercial three-phase supply, sized for the full heat pump array capacity plus auxiliary loads. The plant room connection must be designed in coordination with the district heating distribution network design so that the electrical supply, the heat pump plant, and the pipework distribution system all operate coherently. USP delivers both elements, reducing the coordination risk between separate electrical and mechanical contractors.
Every heat pump connection we deliver is correctly sized, DNO approved, and commissioned before handover. These are real USP projects, not stock photos.
The critical parameters that govern heat pump electrical infrastructure design.
End-to-end heat pump infrastructure capability from a single multi-utility provider.
Every heat pump connection we deliver meets the highest industry standards. Worker safety, public safety, environmental responsibility, and project compliance from planning to sign-off.
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I contacted USP and within minutes had a chat with Justin who described exactly how the job would be done and provided a comprehensive quote including labour and materials and was able to start the work in just 7 days. Justin and his team were brilliant and did an amazing job. I can highly recommend USP.
Jack and Joel were absolutely amazing this morning and really put themselves out to dig a hole without having to dig another hole in my drive. More work for them but one happy customer.
From the initial quote through to work completion, Justin and his work partner were a mix of professional, knowledgeable, good-humoured, and clear in all explained (I felt an instant ease to agree to the work). The work itself was excellent and they left the place immaculate!
George and Jack come out today to move a gas meter. It wasn't a straightforward job, but they both took time to talk me through what they were doing and what the next steps are. Very friendly and polite and thought about the needs of our family.
Jack and George are great.
Bang on time, completed the work perfectly, no issues. Left the meter really neatly finished. Jack and Joel were very courteous and did a great job.
George and Jack turned up and did a first class job, very friendly and professional. Great job lads.
Jack and Joel were brilliant. Very polite, worked to my highest expectations. Left the area as clean and tidy, as was possible. And explained every step of the process to me, answering any questions I had.
Fantastic work from Jack and Johl.
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