Help with filtering Contacts from Accounts based on third module

Help with filtering Contacts from Accounts based on third module

Community I need some advice. There a small thing that is a big stone in our shoe. 

So we have three modules
Accounts, Contacts, Assets.

They are connected
Asset > Account
Contact > Account

I want to email all Contacts from Accounts that have Asset.

Right now I can filter Accounts - that have Asset X.
But I cannot email their Contacts
I do not want to link Assets to multiple Contacts, as this will be many-to-many connection and Zoho is quite limited in that direction.

Reports - do not work, Filtering with related records does not work... Please give me an idea :)