Heat loss guide

Heat loss calculations for installers

Reliable heat loss outputs come from disciplined survey inputs. The commercial value is fewer redesign loops and faster confidence at quote stage.

15,000+ surveys completed across UK installer workflows · Pack and organised photos available in the portal immediately on completion of the visit · EPC by next morning in the standard flow.

Get installer pricing View sample pack

Operational guidance

Input standards that protect heat-loss outputs

What strong looks like

Capture standards

Room geometry captured consistently with supporting evidence
Openings and construction notes linked to assumptions
Assumptions made explicit for audit and design review
Clear traceability from survey evidence to calculation decisions

Old way cost

Where teams lose time

Hidden assumptions only found during install prep
Missing context causing repeated clarification requests
No single source of truth for office and design teams

Vertex workflow

Why teams use Vertex

Cleaner office-to-design handoff
Faster first-pass quoting with less chasing
Install teams start with clearer site context
Portal visibility across teams and roles

Next steps

Related pages and proof

Heat loss service Heat loss inputs checklist Deliverables Get installer pricing