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I had a Bosch condensing, efficiency rating 1.0 installed in 2018. No problems, as expected. Just do yearly maintenance. I got 30% acetic acid off amazon and a submersible pump and braided washer lines from Lowes. Vinegar is only 5% acetic acid.
Even though designed to replace a tank heater, it took 2 pro's an entire day for the install - much more than just hanging it on a wall. Some units are designed for new construction, otherwise adapting the unit to existing plumbing can be a headache. I asked the plumbers what brand they recco'd and they said Navien.
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Reparations for neanderthals!
'70 914-6, 1965 Mustang GT - RIP, '74 911, '01 Box S
'12 Ducati 848 Evo - RIP, '16 Yamaha R1, '13 Aprilia RSV-R
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