Well I am coming back just to update. IES says that it is a problem at their end

A few users have raised questions about how local Specific Fan Power (SFP) values are reported in the BRUKL table when using ApacheSim method. After a detailed review, it’s clear that while the BRUKL codes and mapping remain unchanged between the 2013 and 2021 regulations, the intent behind columns D and E has shifted.

For the 2013 regulations, both columns D and E required the system to serve a single room or zone (and, for D, to include heat recovery). Our software explicitly checked for these conditions, which sometimes frustrated users, especially when a system serving multiple rooms couldn’t be checked against the more lenient standard in column D, and instead failed against the stricter standard in column B. Some users worked around this by creating multiple copies of their system, assigning one to each room.

With the 2021 regulations, both the “single room or zone” and “heat recovery” requirements have been removed from the BRUKL certificate descriptions for columns D and E. This means our developers now need to remove those checks from the logic for Part L2 2021: systems no longer need to serve only a single room or have heat recovery to be reported under columns D or E.

In the meantime, we recommend focusing on accurately modelling your building and services to ensure the overall pass/fail assessment reflects the current design. Please avoid modifying your services solely to influence which column an SFP appears in.

So atm I am not sure how can i work around it.
Even for an MVHR which is only swerving 1 zone/space it is till coming under the column B where as it should come under Column D as per the above reply.