What they don't tell you
(Calgary, AB, Canada)
Navien NPE has been installed for a couple weeks. It's OK, but water pressure drops some 20% due to "that's how it works." Although they don't tell you that before it's installed.
And it makes this weird "sighing" noise intermittently, even when it's not being used.
AND no way it runs on a 1/2" gas pipe. Required a new 1.25" pipe direct from the meter to hit its 199,000 BTU level.
Given what I know now, I would have opted for a conventional water heater at about 1/3 the price.
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