Energy Efficient Hot Water Boiler & Warmer
Posted by Norman Fong
Zojirushi VE Hybrid Water Boiler & Warmer is an energy efficient device that we recently purchased. We have found it consumes far less power than using a microwave to boil water for beverages, instant noodles, etc. It is also far handier than boiling water on the stove.
We had a 6 year old model that needed replacement. This unit is Vacuum-insulated to keep water warm. It provides maximum energy efficiency with 195 degree water falling slowly to 150 degrees 8 hours later.
280 to 420 watts of power are used to boil 4 liters (16 cups) of water to 212 degress. A 1000 watt microwave overloads my energy meter, so we could not measure it directly. It takes about 2 minutes to warm up a cup of water and the microwave is about 65% efficient meaning it uses 1500 watts, which equates to 50 watts of power. Electric burners use about 25% less electricity than a microwave in boiling a cup of water. The unit does use energy even in vacuum mode, 0.05 amps according to my Killawatt, so unplug it from the wall to maximize your energy savings.
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