For installers & pros
Regulated
TM44 applicability checker
Add the cooling output of every unit on the site or system. If the combined output crosses the threshold, a TM44 inspection applies — this checker tells you, and how often it is needed.
TM44 check
Add the cooling output of every unit on the site or system to see whether a TM44 inspection applies.
Cooling output per unit
kW
Combined cooling output
0 kW
Enter at least one cooling output to check applicability.
If it applies
- The inspection must be carried out by an accredited energy assessor.
- The report is lodged on the government register.
- Non-compliance carries an indicative penalty of about £300.
- Applies in England & Wales — Scotland and Northern Ireland differ.
Verified: June 2026 — re-check against official sources before relying on it.
Verify the current threshold and scope. England & Wales.