Yes we still have the WH water condensing dryer it dates around 1970. I think that WH made this product to compete with GEs combo for builder sales where venting a dryer was a problem. I intend to restore this dryer its the only one I have ever seen.

Hi Jerry The Bendix, GE and Westinghouse combos all used about 1/2 gallon of cold water per minute while in the dry cycle, the MT was the most efficient using only 1/3 gallon per minute. I have been known to run that nice warm water into another machine and use it to wash a load of clothes that only needed warm water. You may want to check your machine by seeing how long it takes to fill say a 5 gallon bucket, If it is using much more than 1/2 gallon per minute you may have a bad flow washer in the condenser valve.

As Jamie pointed out water for much of the country was cheap in the 1950s-1970s or a no charge item that was paid for by your taxes and not separately metered. Electricity cost in the same period of time in this country was around 3 cents pre KW and now the US average is just over 10 cents. But these early combs and other dryers used no more power than todays dryers, but still the electric cost was considered significant during that time period. During the 1950s-1960s a natural gas dyer would operate for about 1/5 the cost of running an electric dryer, but over the last couple decades the cost of gas has gone up much more than the cost of electricity for most people in most of the US.