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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 the UK · Pack and organised photos available in the portal immediately on completion of the visit · EPC by next morning in the standard flow.

Guide

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
Where time is lost

Where teams lose time

  • Hidden assumptions only found during install prep
  • Missing context causing repeated clarification requests
  • No single clear record for office and design teams
Why it helps

Why teams use Vertex

  • Clearer packs for office and design review
  • Faster quoting with less chasing
  • Install teams start with clearer site context
  • Portal visibility across teams and roles
Useful next pages

Related pages and proof