This family is manufacturer content (vertical throw supply diffuser) and since I don't get much feedback I came to the forum to find out what designers/end users need the family to do. The results reported by the design grille could then be used later to select a specific model.Īlthough I assume air flow will vary for every grille so anything controlled by flow should definitely be instance driven. If you are doing more of a design with performance specifications intead of particular grille models, it might be better to make one design grille with everything calculated as instance parameters. If you are selecting/specifying particular models of grille then you should probably make them as types or individual families with the specific manufacturers data built in. Whether to use instance or type parameters kind of depends on what level of design you are doing. Or you can have the grille inform you that the noise level exceeds the design limits if the flow is too high, so you should use a different type or two of them instead.

You can also use manufacturers data in other useful ways, such as showing the throw of a grille with a dashed circle that changes size according to the flow. (I personally prefer formulas because of historic problems with lookup tables, but from 2014 onwards they can be loaded into families which makes them a lot more stable).Īn easy way to fit a formula to data is to graph it in excel and choose Add Trendline and Show Formula. Then you can either use a formula that fits the manufacturers data, or a lookup table, to set the pressure loss for a particular flow. Set the pressure loss of the connector to Specific Loss and then link it to a family parameter. If you have a datasheet for a particular grille you can build that info into the family so it gives the pressure drop specified by the manufacturer.

Rvit air trminal color wont chang