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Modern UK housing estate — post-retrofit performance measured by Verity
Verity · Tricity Labs · Post-Retrofit Evidence

Did the retrofit
actually work?
Verity answers with evidence.

When you install a heat pump or upgrade a home’s fabric, the funding, the compliance and the tenant’s comfort all rest on one question. Verity answers it with measured evidence — not modelled assumptions or a spot-check months later.

Measured, not modelled Independent by design BS 40101 BPE Warm Homes SHF evidence PAS 2035 aligned

A retrofit programme lives or dies on whether it actually improved the home. EPC upgrades tell you what a model predicts. Verity tells you what the home delivers — continuously, across a full heating season, independently of the contractor who did the work.

Without Verity

EPC model. Contractor sign-off. Assumed improvement. Spot-check months later.

With Verity

Measured before. Measured after. Continuous across the season. Independent of the retrofit chain.

Post-retrofit evidence

Measured evidence.
Not modelled assumptions.

By measuring the electricity into the heat pump alongside the indoor temperature and humidity it delivers, Verity shows the real, continuous performance of a retrofit — the gap between what was promised and what the home actually experiences.

That gap matters. A heat pump certified to a performance standard in a lab performs differently in a leaky terrace in January. Verity measures what the home experiences, not what the specification assumed. That is the evidence a funder, a board, or a regulator is asking for when they want proof the programme worked.

Continuous measurement. Not a single visit. Not a model. A dated record of how a home performs across a full heating season — the standard that Building Performance Evaluation under BS 40101 requires.

Verity gateway and sensors measuring retrofit performance
Verity outcomes — post-retrofit performance evidence
Heat pump and fabric performance

Prove the savings.
Not just the spec.

A heat pump’s data sheet says one thing; the home says another. Verity measures both sides — the energy drawn and the warmth delivered.

So you can evidence genuine performance to funders, boards and regulators. Continuous measurement across a full heating season, not a single visit. The result is a before-and-after picture grounded in what actually happened inside the home, not what the model predicted would happen.

Energy drawnElectricity into the heat pump — measured, not estimated.
🌡️
Warmth deliveredIndoor temperature across all monitored rooms — continuous, dated, per property.
💧
Humidity and damp post-worksWhether fabric improvements actually reduced damp risk — measured, not assumed.
👀
Comfort, confirmedOccupancy confirmed alongside conditions — the tenant was present, and this is what they experienced.
Before, during and after

Fabric, heating and comfort.
One continuous record.

Before, during and after works, Verity holds a single dated record of how a home performs. Baseline the property’s conditions ahead of a retrofit, then verify the outcome afterwards — comfort, damp and, where a heat pump or electric heating is monitored, its measured energy use.

One independent platform. One continuous evidence trail. From the day works are scoped to long after the contractor has left.

📋 A single, unbroken record — pre-retrofit baseline, works period, post-retrofit performance — ready for funder submission, board reporting, and regulatory inspection without anyone having to compile it.

Before retrofit

Baseline temperature, humidity, and occupancy. The benchmark every post-retrofit measurement is compared against. Established before a tool is lifted.

During works

Continuous monitoring throughout the delivery period — an unbroken record from before works start to after they finish.

After retrofit

Verified improvement — or verified shortfall. Temperature, humidity, and energy use measured against the pre-retrofit baseline. What actually changed, in numbers, with dates.

Verity — independent retrofit evidence layer
The independent layer

The independent layer your
retrofit programme is missing.

Retrofit budgets are increasingly awarded and audited on evidence — real per-home data, not estimates.

Verity provides that evidence layer independently: measured, dated, defensible, and neutral. It sits alongside your programme without being part of it, so the proof of performance comes from a party with no stake in the outcome.

That independence is the whole point. A contractor evidencing the success of their own installation is not independent evidence. Verity is.

“The difference between a supplier marking their own homework and an instrument you can trust in front of a tribunal.”

No retrofit delivery arm
No stake in the outcome
Measured, not modelled
Defensible at audit
Add the independent layer

Book a pilot conversation.

Tell us about your programme — property types, retrofit scope, and what evidence you need to produce. We’ll come back with a clear next step.