Hi guys,

In the ANSI IIAR 2-2021is written:
The design at the vent end point may be a "double 45 degree" diffuser, a "bullīs horn" diffuser, a "self-closing flapper cap" or a "sock hoding cover"..... Another design method that may be incorporated has a fully open vent end point that is the "exterior stack extension" diffuser.
Does anybody has pictures or drawing of these type of possible diffusers?

Regards,

Volnei