This proposal introduces transitional provisions into UN Regulation No. 122 should the proposals in document GRSG/2018/21 be adopted. GRSG/2018/21 would change the technical requirements for vehicles equipped with heat pump heating systems and therefore, transitional provisions would be applicable.

Proposal to clarify the requirements for electric heaters by limiting possibilities for exemptions applicable to interior heating systems supplied by several electrical elements.

Proposal to introduce provisions for interior heating systems using heat pumps.

Proposal to exempt all heaters located outside the passenger compartment and using water as a transfer medium from the requirements of the annexes on air quality and temperature. The current text only exempts combustion heaters.

Proposal to exempt all heaters located outside the passenger compartment and using water as a transfer medium from the requirements of the annexes on air quality and temperature. The current text only exempts combustion heaters.

Proposal to exempt any heaters (and not only combustion heaters as in the current text) located outside the passenger compartment and using water as a transfer medium are deemed to comply with the annexes on air quality and temperature.

Integrated into UN R122 as Amendment 3 as of 15 August 2012.