In a hot water distribution system, the water oscillation in hot water supply line maintains hot water line in heated condition by ensuring heat transfer from the water heater to a hot water line executing regenerative heat transfer technique. Fulfillment of longitude water oscillations is ensured by...http://www.google.com.au/patents/US20040244835?utm_source=gb-gplus-sharePatent US20040244835 - Immediate hot water supply device
