Mark, the first people I knew who had a WH RO had lived in an apartment in Atlanta in the 40s and 50s. It was an old building and they had a screen porch. They had a gas apartment range in the kitchen and, like so many gas apartment ranges at the time, it did not have an oven thermostat. So, to not draw this out, they got the RO to be able to prepare meals in the summer without turning on the stove and heating up the apartment and to have a thermostaically controlled oven year around. Lots of people used to use these the way you do. Many others took them to their summer cabins where it was the only cooking appliance starting in the 1920s when ROs began to be manufactured.