Recent content by 1oldman

Thanks for the replies.

It has to seal air tight.

New atmospheric vent WH requires a 4” vent connector. I have a 5” id clay thimble into the tile lined masonry chimney. That would mean that I would have a 1/2” gap circumferentially between the 4” vent connector and the 5” clay thimble. The small gap could be filled with furnace cement I...

Thanks for the input, but I just found the answer and confirmed it. Found it right here on this site, in a different forum. If interested, see the very last post here: https://terrylove.com/forums/index.php?threads/2015-naeca-standards.75419/

I seem to recall that a decade or so ago new energy efficiency codes were written by NAECA such that manufacturers would need to increase the efficiency of all domestic hot water heaters sold after 4/16/2015. Meant different approaches to gas vs. electric. As far as natural gas tank water...