This ultra high-efficiency dual-purpose boiler has an rating of 95%, which provides 140K for space heating, and comes with an optional domestic hot water capability that can provide 3. 2 gal/minute at a 77O temperature rise. This product provides home owners with one appliance that saves money on operating expenses, reduces overall installation costs and takes up less space than traditional space heating and water heating appliances. It also reduces greenhouse gas emissions by utilizing a mesh burner that reduces nitrogen oxide and carbon monoxide production and meets all nationally recognized low nox emission standards.