What heat pump commissioning records matter when you sell?

What commissioning means here

Commissioning is the work that proves the heating system was left running safely and efficiently after installation. It is not the same as an EPC assessment, though the two relate to efficiency.

What buyers look for

Handover checklist signed by the installer: often lists flow temperatures, defrost checks, and any limits on emitters.

Settings summary: detail on weather compensation, schedules, and hot water mode if separate.

Refrigerant or sealed-system notes: where relevant to maintenance.

Practical tips

Store scans as PDFs with dates in the file name. If the system was altered later, keep a short note of what changed and who signed it off.

Using Property Passport UK

Start from the address on [Property Search](/search). When you own or manage the home, [claim your Property Passport](/claim/start) and upload Documents with clear dates and sources. Browse more explainers in the [Property Guides library](/guides). This article is general information, not legal, tax, mortgage, or survey advice.