i bought 2 unitsof DEKA water heater about 1 year plus now. those water heaters have given me nothing but problems. during warranty period, i called up DEKA for 5 times. one unit heats water the water too much wheareas the other, like couldnt heat water at all. the 'SILENT' pump is totally rubbish, even my deaf grandmother can hear the pump's noise. my USER ADVICE, DONT GET DEKA UNLESS U LIKE PROBLEMS!