Electric resistance heating devices – Heating devices – Tank or container type liquid heater
Reexamination Certificate
2006-11-06
2009-11-17
Campbell, Thor S (Department: 3742)
Electric resistance heating devices
Heating devices
Tank or container type liquid heater
C392S455000, C392S464000
Reexamination Certificate
active
07620302
ABSTRACT:
A high efficiency, peak-power reducing, domestic hot water heater is described. It comprises a closed tank having a predetermined water holding capacity. A hot water outlet is provided in a top end wall of the tank. A cold water inlet is provided in a side wall of the tank adjacent a bottom wall thereof. Three spaced apart resistive heating elements project substantially horizontally in the tank. A bottom one of the resistive heating elements extends in the tank and spaced slightly above the bottom wall. A middle one of the resistive heating elements extends in the tank at a level close to an average maximum water consumption volume drawn during a peak power demand time period. A top one of the resistive heating elements extends between the middle element and the top end wall of the tank. The bottom element has a low watt density in the range of from about 15 to 30 W/in2.
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Lesage Claude
Lesage Jean-Claude
Campbell Thor S
Giant Factories Inc.
Ogilvy Renault LLP
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