What documents should you keep after installing an air source heat pump?

Why this paperwork matters

An air source heat pump is a fixed improvement that can affect EPC results, insurance, and buyer confidence. In England and Wales, sellers are expected to present a fair picture of what was installed, when, and by whom. Good records also help your conveyancer answer lender and search enquiries.

What to keep

Installation and commissioning: retain the final invoice, the installer's details, and any commissioning sheet that shows the system was set up and left in working order.

MCS and product compliance: Microgeneration Certification Scheme (MCS) documentation is widely treated as the baseline for certifying domestic renewable installs. Keep the MCS certificate and any manufacturer serial references.

Building regulations: many installations need notification to building control or a competent person scheme certificate. Keep the completion certificate or registration document.

Warranty and maintenance: keep warranty booklets, extended cover, and records of annual service if a service schedule applies.

At sale time

Buyers often ask how the system is controlled, whether radiators or emitters were resized, and whether insulation was upgraded at the same time. Upload clear Documents to your Property Passport so Stakeholders can see them under permission.

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.