Mechanical and electrical design for low-carbon buildings
Jupiter Engineering is an independent mechanical and electrical engineering consultancy. We design low-carbon heating, ventilation and electrical systems for existing buildings, and measure how they perform once they are running.
Across twelve grant-funded schemes delivered to date. Carbon figures are lifetime; the equivalent annual saving is 2,414 tCO2e.
Clients include Eddisons and Kirklees Council, as well as academy trusts, contractors and retail brands.
What we do
Feasibility and decarbonisation plans
Costed options and phased plans for taking buildings off fossil fuel heating, with capital cost, running cost and carbon side by side.
Find out more →
Heat pump design
Air, water and ground source heat pump systems for existing buildings, sized from measured demand rather than the plant being replaced.
Find out more →
Mechanical and electrical design
Heating, ventilation, cooling, public health and electrical design for retrofit and new build, coordinated in-house.
Find out more →
Performance monitoring
Jupiter Performance measures what installed heat pumps deliver against the design, with an engineer's review.
Find out more →Recent projects
Solving resilience issues whilst decarbonising a SEND school
Heat pumps with spare capacity for a special school that had been relying on its remaining boilers running flat out.
Read the case study →
Developing a decarbonisation roadmap for three council buildings
Heat networks, heat pumps, solar PV, batteries and fabric measures assessed across three buildings.
Read the case study →
Developing a natural refrigerant heat pump scheme in the centre of Bolton
A rooftop R290 heat pump scheme on a tight town-centre site, within the existing electrical supply.
Read the case study →“… Their ability to fully understand project requirements, identify and communicate issues at an early stage, and work seamlessly with the wider design team enabled decisions to be made quickly and efficiently. Their collaborative and agile approach, combined with strong technical expertise, was instrumental in achieving a coordinated and timely project delivery, which is why they remain a trusted partner to BTG Eddisons.”
Measured against the design
Heat pump schemes are funded on predicted performance. Jupiter Performance connects to the existing BMS and meters and reports what the plant is delivering against that prediction.
On this school, heating is running at a COP of 3.50 against a design of 3.20 and hot water at 2.81 against 2.60. Combined performance is 2.98 against 3.00, and the dashboard reports that as below design.
Measured against design on a monitored schoolLatest insights
Making the case now the funding has gone
PSDS was cancelled in June 2025 and the Low Carbon Skills Fund has had no allocation since 2024/25. What is still open, why the old business case stops working, and the three arguments that do still get approved.
Read the article →Why commercial heat pumps underperform after installation
Elevated flow temperatures, inadequate distribution, frequent cycling, control faults and incomplete setup. The usual causes of the gap between designed and delivered performance.
Read the article →
What estates teams should check before replacing gas boilers with heat pumps
Heat consumption patterns, flow temperatures, electrical capacity, hot water demand, controls and data availability. The checks worth completing before anyone specifies plant.
Read the article →Talk to us about a project
Tell us about the building, the problem and the programme. We reply within one working day with whether we can help, what it would cost and what we would need from you.