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Case study (anonymised, live data)

ASHP case study: large detached oil-heated home with wet UFH

A real Vertex survey record from South Yorkshire showing how structured field evidence helped an ASHP install team plan around wet UFH, electrical limits, and a large multi-floor layout.

Customer details are removed. The property type, technical findings, and installer implications are taken from the live survey record and presented in a privacy-safe format.

What this ASHP survey covered

This was not a simple boiler-swap property. The install team needed one record that showed emitter context, electrical constraints, floor-plan clarity, and enough layout detail to avoid reopening the job later.

22Rooms assessed
3 floorsDetached layout with multiple decision points
Oil boilerExisting heating type at survey stage
20 roomsRooms flagged with wet UFH evidence
100A / 0 spareMain fuse rating and spare-way position
6 plansTop-level floor-plan uploads in the record
Property context

Detached house in South Yorkshire, 2000s build era, 4 bedrooms, 4 bathrooms, 2 extensions, and multiple technical spaces including plant-room and gym context.

Why it matters

Large properties stall when layout, emitters, and electrics come back in pieces. One pack stopped that happening here.

The findings that mattered to the ASHP install

The install challenge was not just size. It was the combination of scale, wet UFH coverage, electrical constraints, and the need to keep every team working from the same version of the property.

Emitter picture

Wet UFH across most of the property

Wet UFH was flagged across 20 rooms, including the kitchen, living room, entrance hall, utility room, downstairs landing, gym, games room, cloakroom, and several bedroom / en-suite areas. That gave the design and install teams a much clearer emitter map from day one.

Electrical finding

100A supply with no spare ways

The incoming electrical picture mattered immediately. The survey captured a 100A main fuse and zero spare ways, with the meter located on the side of the property. That is exactly the sort of detail that can derail an ASHP job later if it is not surfaced early.

Layout complexity

Three floors, two extensions, multiple technical spaces

This was not a straightforward rectangular property. The record included 6 floor-plan uploads and a 22-room layout with extension context, which gave the office, design, and install teams a cleaner shared understanding of the building before install planning moved on.

How the pack helped the install team move

Quoting and design

The pack made it easier to assess the job as an ASHP retrofit rather than a vague “large detached house”. Oil-heating context, floor-plan coverage, room count, and UFH evidence were already tied into one record.

Install prep

The install team had earlier visibility on layout, plant-room context, and electrical constraints. That reduces the chance of hitting a hard limit after the job is already under way.

Handoff quality

Office, design, and install teams work from the same record instead of each piecing together their own version.

Commercial takeaway

On larger ASHP jobs it is simple: either the next team can move, or they are chasing information that should already have been there. This job moved.

Why installer teams use this kind of survey pack

For the office

Large properties stop being “hard to quote” when evidence, layout, and scope signals are grouped clearly enough to support fast internal review.

For design

Wet UFH coverage, room count, extensions, and electrical limits are the sort of details that reduce redesign loops when they are visible early.

For install

The install team knew the electrical position, the plant-room layout, and the UFH coverage before they arrived. No questions that should have been answered at survey.

More examples and next steps