mini storage tank for dedicated recirculation loop
So, I already have a thankless water heater and since I'm in the middle of some heavy-duty remodeling of the house, we are thinking of installing a dedicated hot-water recirculation loop in order to get rid of the cold water sandwich and of the delay. my thinking, is that Navien has the right idea, at least in concept, and I want to emulate it in my home. problem is, I can't find a small buffer tank of say, 3-5 gallons, except for an expansion tank. I think it might do, but I'd like your opinion on the matter.
here's the layout I was thinking of:
tankless to expansion, to faucets, to Redytemp pump, to tankless.
the reason for a 3-5 gallon storage tank is that we have 2 growing kids who can't brush their teeth while one of us takes a shower. to say nothing of running the dishwasher or a load of laundry. a buffer tank would allow the tankless enough time to "catch up" to the spot demands.
what are your thoughts ?
Thanks a lot, and happy new year!!!