Transferring parameter data between family instances

[deepesh_wig]

I want to send the result of a calculated shared parameter from one family to a parameter in another family. Is this possible? 

e.g.:

Family 1: a "required refrigeration" value based on the length, breadth, height of the family.

Family 2: a refrigeration plant family which takes the value referred above. 

I assume this is possible using systems but I'm not at all familiar with those. 

Thanks in advance. 

[denis_borodin]

I don't clear understand what is your 1st family, but you can easy make it with primitive Dynamo code

 

[Mikhail.Davtyan]

Can you be more specific? Are this families connectected? 
In any way, try ModPlus - there tones of free plugins, one of them is "copy parameter values" https://modplus.org/en/revitplugins/mprcopyparametervalues
It says it cost somthing, but I can use it in free version too

[deepesh_wig]

Thanks @denis_borodin and @Mikhail.Davtyan for the proposed solutions. Not quite what I'm trying to do. Let me explain a bit further below:

Family 1 is a cold-room element with embedded formulas using room surface area to calculate required refrigeration. 

Family 2 is cold-room plant with several family types based on refrigeration generation capabilities. 

A typical project may have 3-4 cold rooms and therefore 3-4 plant. 

I want to be able to link room 1 to unit 1, room 2 to unit 2, etc. and if room 1 needs 100, unit 1 becomes family type 1. If I change the room size so that room 1 needs 150, unit 1 should automatically change to family type 2. 

Effectively, I'm not copying parameters - I'm trying to use a parameter from family 1 to drive a parameter in family 2 in a project environment. 

[denis_borodin]

Really nice question). I think you can use only equipment family and nothing else. Make a property "required refrigeration" into them, calculate it by Dynamo,

and then your family type may be selected automatically