That unit is a Emerson Electric co. In-Sink-Erator instant hot water heater, Model "Hot 1" Read about it at
It runs off off 110 volts only. It will produce1/3 gal. up to 40 cups of of 190deg. F water per hour.
I installed one in our Boler
about 4 years ago and I am very happy with it. Great to wash a few dishes or a quick cup of coffee or soup.
I paid about $169 for it at Home Depot. Careful shopping my get you a better price.
As we don't go boon docking and have always stay where there is 110v. power it is ideal. If we want to stop for lunch when we are on the road, we can use the propane
heats up the kettle pretty quick!
As far as the Coleman hot water heater I can't give you any comments on it. I see they have them at Canadian Tire.
Oh! One other thing. I added a "tee" in the city water line for the hot water heater.
You also need a special brass connector for 1/4"copper line to plastic tubing which I picked up at a hydraulic systems suppler.
The only disadvantage is some place you can really taste the chlorine in the water.