On 2/24/2014 9:26 AM, Bruce Joseph wrote:

This is a fully funded Kickstarter project.  The company should start selling this tankless water heater early this year.

http://myheatworks.com/

If you need a new water heater, this might be worth consideration.

I am not the least bit impressed with tankless water heaters. Why would you want something that is only 15% more efficient than a conventional gas or resistance electric water heater when you can get a heat pump water heater that is 250% as efficient, or a solar water that is 1000% as efficient? Electric tankless heaters are peak load problem for the utilities, and gas tankless heaters use a non-sustainable fuel.

The one place they make sense is in a vacation cabin that is unoccupied most of the time.

Here is an excellent article on Heat Pump Water Heaters:

http://www.greenbuildingadvisor.com/blogs/dept/musings/heat-pump-water-heaters-come-age

Habitat for Humanity is using the GE Geospring in all their new homes, available at Ferguson's.

There is an electric backup element in my solar water heater. I leave the breaker turned off 50 weeks a year, so my water heating is zero cost 98% of the time. A typical gas or electric water heater will cost $[masked] a year to run. I have attached an excellent article from Home Power Magazine on Solar Water Heaters.

The rule of thumb I tell my energy audit clients is that if you have 1 person in the house, then a heat pump water heater is the optimal solution. If you have 3 or more people in the house, then solar is the most efficient. With 2 people, either would be excellent.

Regards,

Robert Bulechek
RESNET Home Energy Efficiency Rater
EPA Energy Star 3 Rater
BPI Building Analyst Pro
BPI Building Envelope Pro
BPI AC & Heap Pump Pro
NABCEP Photovoltaic Designer

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