Rheem tankless venting requirements.

[imaginenewmedia]

Rheem Platinum Condensing, 199KBtu. The manual says 3" sched 40 PVC for exhaust and vent. Is this legal in Canada? I would have thought System 636.

[Admin]

Is this your model?

https://www.hvactechgroup.com/files/Rheem%20RTGH-95DV.pdf

See page 34.

All exhaust venting materials for product installed in Canada must meet ULC-S636.

You can use Ipex or Royal PVC or CPVC.  PVC being the cheaper option.

https://www.ipexna.com/products/plumbing-mechanical/gas-venting-systems/system-636-flue-gas-venting/

https://www.napcopipe.com/en-ca/product/pipe/gas-venting-pipe

[imaginenewmedia]

Close, the manual looks the same, but mine doesn't say 94% efficiency, it says 'High efficiency'. Regardless, page 34 does state 'All exhaust venting materials for product installed in Canada must meet ULC-S636'. The 'cheat sheet' that came with it only mentions SCH 40 PVC pipe. Different strokes for different folks I guess.  Thanks!