Will Dimplex Installed Electric heater require annual electrical safety testing?

This should be done in accordance with BS7671 Regulation 652.1 

 See https://www.electricalsafetyfirst.org.uk/find-an-electrician/periodic-inspection-explained on guidance on how often an electrical installation should be inspected. 

Electricians should refer to the IET Code of Practice In-Service Inspection and Testing of Electrical Equipment 5th Edition ISBN 978-1785619663 (or later), specifically Section 11 covering the frequency of in-service inspection & testing for further clarification on this risk assessment to determine frequency of appliance testing.

Applicable to models: 

PLX050E PLX075E PLX100E PLX125E PLX150E GFP050BE GFP075BE GFP100BE GFP150BE GFP200BE

GFP050WE GFP075WE GFP100WE GFP150WE GFP200WE MFP050E MFP075E MFP100E MFP150E MFP200E

LPP050E LPP075E LPP100E LPP150E QRAD050RF QRAD075RF QRAD100RF QRAD150RF QRAD200RF

QRAD050E QRAD075E QRAD100E QRAD150E QRAD200E BPH100M BH100G CEP500E CEP750E CEP1000E CEP1500E CEP2000E CEP050E CEP075E CEP100E CEP150E CEP200E LST050E LST075E LST100E LST150E 

QM050, QM070, QM100, QM125, QM150

QM050RF, QM070RF, QM100RF, QM125RF, QM150RF

XLE – XLE050, XLE070, XLE100, XLE125, XLE150

DUO – DUO300i, DUO400i, DUO500i, DUO300n, DUO400n, DUO500n

CQH – CQH070, CQH100, CQH125, CQH150

TSRE – TSRE050, TSRE070, TSRE100, TSRE125, TSRE150

TSR – TSR6AW, TSR12AW, TSR18AW, TSR24AW, TSR6MW, TSR12MW, TSR18MW, TSR24MW, TSR12ACW, TSR18ACW, TSR24ACW

TSF – TSF24K, TSF32K, TSF42K

CAR – CAR033, CAR050, CAR075, CAR100, CAR150, CAR200

ECO RESPONSE – ER300, ER400, ER500

SFHA – SFHA18AW, SFHA24AW