In fairness to all, we don't discuss pricing on the Wall. Thanks for your cooperation.
Do you need to use the mixing valve for Indirect Water Heaters
I posted this as a response to another discussion but thought it might merit a new discussion.
My question relates to Mixing Valves. I just had a 60 Gal Superstore Ultra installed with the optional mixing valve. The documentation mentioned it as optional. I don't believe that either Gas or Electric fired water heaters need them. My question is optimizing efficiency. We got the bigger tank because with the in-line furnace heater we used to have, you could never fill a tub with hot water. Although only two of us now live in the house it is a 4-5 bedroom with 3 full baths and I thought for resale value having a big tank would be desirable for resale. To me it doesn't seem to make sense to heat the tank to 140 degrees, then use the mixing valve to mix in cold to drop down to 115-120 and then again at the tub or sink mix cold again to get to "consumption temperature" of less than 100. This makes sense to me if you need massive amounts of water to supply so that 60 gallons of 140 degree water would probably supply 100 gallons or more of less than 100 degree water. For us, I would think that the most energy efficient settings would be to set the water temperature for the tank to 120 degrees or so and set the mixing valve to maximum (no cold water). This would supply 60 gallons of 120 degree water which when diluted with cold at the sink or tub would be more than we would ever need. Lowering it even more might make sense. We never wash clothes with hot water and the dishwasher has a heating coil to increase the temperature. Anybody have experiences with this?