Hi ​@Oleh! Thanks for posting in the community! The setup you have listed would work, although I would change it to “at least once” rather than “greater than zero” for clarity’s sake. Definitely put the delay prior to the conditional split so that it looks at behavior after the time delay rather than before the time delay. 

My only real advice would be to use caution with resending emails to people who have not opened. People who receive too many emails are more likely to unsubscribe and lose interest in the company. I would potentially add an additional conditional split for people who have not opened the email that checks how engaged of subscribers they are and tries to recapture customers with high customer lifetime value rather than people who are unlikely to convert. 

Let me know if you have any other questions!

Hello ​@Oleh  this is the step to take when doing it, i have done it for many client before and its works 
If you really need help with it again you can reach out to me again. just follow the step

Goal:

• If Email 1 is opened → send Email 2.

• If not opened → resend Email 1 with a new subject line.

Setup:

1. Send Email 1

2. Add 1-day delay

3. Add a Conditional Split:

   • If opened → go to Email 2

   • If not opened → resend Email 1 with new subject

Tip:
Always put the delay before the split so Klaviyo waits before checking.

Done:
Your plan works. Just adjust the timing as shown.

Hi there,

Thank you for your recommendation and help.