I inspected a large home - 7058 sqft. Two large gas fired water heaters with a small circulating pump. The heaters are plumbed one after the other in series.
My question is why are there two much smaller storage tanks located after these heaters?
Is this storage to prevent running out of hot water during peak usage? - 7 bathrooms.
Where does the pipe in the right side of the picture with the two heaters go to? What about a snow melt system. With a house that big it’s a possibility?
That would be my guess, but I don’t understand why the two powered units are insulated and the two holding tanks are not. What is the total holding capacity when you add all 4?
Looks to me like a good argument for “on demand” water heating equipment.
The tanks are connected in series, it’s like one big tank. Cold water enters system at right tank, is heated, fed to small tank at far left, then to next small tank, then to large tank at left, heated again if necessary, then fed to house distribution system.
Not true if you follow the pipes. The photos do not make this clear but all of these heaters/tanks are connected in series with the two heated tanks first and then the two unheated tanks last. Makes no sense to me but I thought there may be a reason.