Why are there two EPB standards on indoor environmental input data: ISO 17772-1 and EN 16798-1?

EN 16798-1 has been developed by CEN/TC 156 as one of the EPB standards under the EU mandate (M/480) to CEN. It was approved and published in May 2019.

ISO 17772-1 has been developed, parallel with EN 16798-1, as an ISO document. This standard was approved and published in 2018.

Similarly, EN/TR 16798-2 and ISO/TR 17772-2 were developed in parallel, as technical reports accompanying the respective standards.

Due to collaboration between the experts in ISO and in CEN the content of the two standards is quite similar. From the beginning of the development it was decided not to opt for the preparation of a combined EN ISO standard, to decrease the risk of delays in case of unforeseen disputes. Now that the two standards have been successfully completed and published, it will be discussed in ISO and CEN (ISO/TC 163/WG4 (JWG of TC 163&TC 205) and CEN/TC 156 & CEN/TC 371) to develop a combined EN ISO standard during future revisions of the two standards.

Read more on the difference between CEN and ISO standards

2019.07.22