1) I had a gas company come out and install piping for me. This is a new house. They were never happy about doing it because I have a basement (In TX there are almost no basements). When it came time to install branch lines to where appliances would be (on demand water heater,...
heater is then able to circulate the water in the hot water line with the help of a pump and keep the water always hot in the hot water pipes, hence providing near instantaneous hot water at the destination and eliminating the wait for hot water, and no water is wasted down the drain....
The place that sold me the water heater said that copper is against code (at least where I live); I replaced it with yellow coated stainless steel flex line. This thread made me glad that I didn't call a "professional" to install the water heater - someone who might have said, "trus...
The swirler is mounted between the combustion chamber and a cylindrical plenum chamber, equipped with a cord-shaped electric wire heater for the air preheating and a perforated plate to produce well-determined inflow conditions. The flows were studied for the normal (293 K and 1 atm.) and elev...