Oil fire vent clearance to conduit

I’ve tried searching and can’t find any information. Does anybody know if there is a clearance requirement of a oil fired monitor heater exhaust to conduit such as this.

Go to manufacture of the heater.

Being that close to the wood battens, I doubt it is an issue with the exhaust. However, Eric’s suggestion is excellent.

Looks like a direct vent termination. Look up the specs for that oil or kerosene heater and confirm the clearance requirements. They’re all slightly different.

Is that PVC conduit?

I’ve tried looking up specs but I can’t find them anywhere. Yes pvc conduit