| http://www.w3.org/ns/prov#value | - It wasn't cheap (appx 2300 installed) and it does not make sense ... but so far (3rd month) it works with few complaints.They have their quirks, especially in the time it takes to get the hot water to the second floor (40-50 seconds once the hot water is turned on.) And it is still hard to tell, but it seems like we are using about 20% less gas overall.
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