I just visited your website. This is a wall-hung boiler; thermal output is 17 kW (about 58,000 Btu/hr, I believe) and electrical output is 3.0 kW. The fuel is natural gas. Very impressive.
15% conversion to electricity. Instead of 98% conversion to heat, it's 80% conversion to heat and 15% conversion to electricity. If electricity is worth 3x the price of gas, that's 125% by value. It's worth a look.
The version shown, based on the figures here, converts 15% of the heat to electricity (not great), but electricity is worth 3x the price of gas, so: 80% heat, 15% electricity, 5% waste. But, by value: 80% heat, 45% electricity, 5% waste. So, worth a look if reliability and cost aren't problems.
