Adds a Boiler Hub and clamp-on boiler sensors to the base COSIE device. Captures fabric response, heating delivery and comfort before and after any retrofit intervention - evidence that the work delivered what PAS 2035 required.
What COSIE homes Pro delivers
With the Government's net zero 2050 target, monitoring temperatures and energy use can indicate homes most in need of upgrading and provide a data benchmark for intervention priority.
The Warm Homes Social Housing Fund Wave 3 has a Digitalisation of Retrofit pot. Monitor and evidence savings in energy use, boiler operation and environmental improvements - with continuous data, not spot checks.
Homes cold due to fuel poverty exacerbate health inequalities. Identify residents showing signs of fuel poverty - social workers in Sutton used this data to identify 22 residents at risk last winter.
A proactive approach to property repairs saves time and money. Continuously monitor boiler energy use alongside home temperature - potential issues indicated before the resident even reports them. Increased humidity when the boiler is in use can also indicate possible water ingress or another property defect, flagging maintenance issues before they become costly repairs. Replacement devices are automatically shipped when battery level is low - no maintenance contracts, no site visits for power.
Mould likely occurs where relative humidity is over 70% for long periods. The more humid the air, the more energy needed to warm the home - a dual risk for residents that COSIE homes Pro tracks hourly. The NHS notes that living in a home with damp and mould makes residents “more likely to have respiratory problems, respiratory infections, allergies or asthma” and can impact the immune system.
Analyse heating and energy use patterns across housing archetypes. Identify homes needing improvements, select for retrofit, monitor performance of various heating systems post-intervention.
The retrofit journey
COSIE homes device installed, establishing the pre-retrofit environmental baseline with hourly readings.
Boiler Hub plus clamp-on sensors fitted to boiler pipes, measuring heating delivery and system performance.
Fabric improvements, insulation and heating system upgrades carried out per PAS 2035 requirements.
Before/after comparison, automated reporting and full PAS 2035 compliance evidence generated from the data.
COSIE homes samples environmental data every hour across all four stages. Nothing is missed before, during or after the retrofit intervention - giving you a complete, court-admissible evidence chain.
By harnessing the power of smart and digital technologies we can modernise our energy system, helping improve customer experiences and deliver a net zero future.
Greg Hands, Energy and Climate Change Minister, 2022
Housing teams now have the data infrastructure to answer the hardest funder questions: which properties are worst performing, what is the current baseline, and how will you prove improvement? COSIE homes Pro provides a continuous stream of environmental and heating performance data - giving sustainability managers the archetype-level analysis needed to prioritise the Warm Homes Social Housing Fund pipeline and apply for Digitalisation of Retrofit funding with confidence.
When a home's indoor temperature consistently drops below 18°C and boiler run-time shrinks - but outside temperature hasn't changed - the data tells a story of a resident rationing their heating. COSIE homes Pro surfaces these patterns automatically, giving welfare teams an evidence-backed referral trigger. In Sutton last winter, this approach identified 22 residents at risk of fuel poverty, enabling early intervention before health consequences escalated.
PAS 2035 requires a monitoring and evaluation strategy for all medium and large domestic retrofit projects. With COSIE homes Pro, the evidence is generated continuously from the moment the device is installed - pre-retrofit baseline, conditions during works, and post-retrofit performance. Automated before/after reports are ready for your Retrofit Assessor, Retrofit Coordinator and funder audits without manual data collection, reducing compliance overhead and removing the risk of insufficient evidence at handover.
Ready to start?
Start with a baseline. Measure the intervention. Prove the outcome. That's what PAS 2035 looks like in practice.
