Why does water get cold so quickly?
We are in the Washington DC area. We have a new 66 gallon electric water heater in the basement, upper and lower are around 125 degrees. Average size, 2XXX sq ft house. Kids get a bath at 7:30, turn dishwasher on at 9:45, take shower at 10PM. We have a rain shower head, which I'm sure use sa lot of water, but we don't turn it on full blast by any means. We get maybe 6, 7 minutes of hot water. Then no more hot water in house.
Our master bath is the farthest away from the basement, but it's not a huge house. Our bath is above the garage, but I did just insulate all the hot water pipes in the garage ceiling, plus the insulation and drywall.
Is this really normal? We notice a dramatic difference during the winter months in water temperature. During winter we get like 5 minutes of hot water (and that's with not running the dishwasher, clothes washer, etc.)
Either way, I really can't expect more hot water than this? Do I really need to get an instant hot water heater for my one bathroom? That seems crazy?!?
Thanks for any info or suggestions!!