In every one of these calculations people always forget the cost of money, or the lost opportunity cost.

He claims a saving of $3,300 and around 9 years to payback, so he probably spent around $29,000 up front. That same money invested at 7% would have returned $2,080 per year, or he may have had to spend $2,080 per year to borrow the money.

That reduces his "saving" to ~$1,220 per year and is now around 24 years to payback the cost.

The address is for the Ballard branch of the Seattle Public Library, not the downtown branch. The library web site confirms this.

It runs on 240V and takes 25 seconds. You get hot water in 3 seconds but it takes 25 seconds for a full cup. In the USA with 110V it'll take over 50 seconds. Deceptive marketing.

Brilliant! - hide a flat panel HDTV in a wall that looks like it's one giant flat panel display. Not in my house.