Offset instance parameter - sometimes present, sometimes absent

[Redrunner92]

Does anyone know why some families have an Offset instance parameter and others do not? All the casework I have used has this parameter. Some specialty equipment has it and others do not. For example, I have a fridge and a range. The former has an Offset instance parameter while the latter does not. Is there logic to this property's presence or absence?

Fridge has Offset property

Range does not have Offset property

[barthbradley]

Possibly the Family was re-categorized to Specialty Equipment.  

...another driver might be "Work-Plane Based": 

[barthbradley]

Does the Refrigerator have an ice-maker?  

[Redrunner92]

The former is likely. Neither of these families have the Work-Plane based box checked. Furthermore, checking Work-Plane based makes an entirely different set of options, and the ones which show up are not the property I am looking for.

These are not the properties you are looking for.

[Redrunner92]

My clients are developers and the building is a cheap apartment complex. Of course it doesn't. It barely turns on. 🙄

[barthbradley]

Is the Range a Hosted Family (e.g. Floor Hosted)?

[syman2000]

Old pre-2009 families have this issue where you don't have offset. I've encounter this from time to time. To fix this issue, I usually have the family that don't have offset and then insert it into the new blank family. That way you get the offset value.