About the Completion Certificate
Issued only when a successful test scores more than 80%. Keep it with your records. It is not proof of safety or compliance and does not replace professional inspection.
Home Heating Assessment Kit
Check your heating water at home
Use one guided kit to check water clarity, inhibitor protection and pH from a radiator-water sample. See your readings in an online dashboard and printable report.
£17.99 with free UK delivery
A water check at one point in time. It does not replace a professional heating-system survey.
How it works
Three steps to your results
Log in first
Scan the code in your kit box, log in to the Test Results Portal and read its safety instructions before you start.
Follow the guided test
Collect a radiator-water sample and record clarity, inhibitor and pH readings. The guide includes a 15–20 minute waiting stage.
Review your report
See your assessment dashboard and keep the printable report for your records.
Complete the test only while logged in and follow the full portal instructions. Preview the kit instructions or see the in-box demonstration.
Want to compare over time?
The £30 Twin Re-test Pack provides two separate assessments. Compare readings before and after work or at different times; improvement is not guaranteed.
View the Twin Re-test PackNeed an on-site review?
A Home Heating Survey or Home Buyer’s Heating Survey is £299. You can enquire without buying a kit first.
Compare heating surveysAlready have a kit?
Scan your kit-box code and log in before testing. The downloadable instructions are a preview only.
Access your results