Replacing Noritz NRC1111-DVNG 11GPM with Commercial Noritz or Navien

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Lifespeed

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That's what everyone is saying but Navien's website video and manual on NaviCirc states it works with the A, A2 and S2. Thank you.
My S2 is aware there is external circulation through a configuration menu, as well as type of circulator: always-on, intelligent, etc. This allows it to survive in a hostile recirculator environment, although it's preferred to set up external recirc correctly with an aquastat. I think they define an S2 aware of recirc, as "Navicirc". Which is slightly better than marketing fluff.

For a new install without plumbed-in recirc, the A2 is great.
 
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GReynolds929

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You can't see the stainless pump body in the photo? The venting is a quick install to get hot showers while I wait for the roofer to come out and replace the roof jack to fit the PVC concentric vent. What a bunch of critics :rolleyes:

View attachment 95086
That could be painted cast for all I can tell from the pic. Just trying to give some info. Yeah, plumbers are a critical bunch, ask 5 different plumbers how to do something and get 5 different answers. Looks good, no offense intended.
 
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