I have one in my home. I don't live in TV "YET" but I will.
As stated before, it will take a very very long time to recover your costs at the rate that we pay for nat. gas now.
It is expensive, mine about $1200 for the Rinnai plus install.
It works perfect and very quiet.
As far as mineral build up you must use a water softner to keep it clean or it will clog and fail.
So why did I do it??
I design homes here in Texas and my customers kept asking me what I thought and I could not get good reliable info from my local Rinnai supplier so when I built my home 5 or so years ago I installed one in the guest side of the house and it works great.
Would I do it again, sure but only because of space savings and not utility bill savings.
Is it worth it, probably not.
EB
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