Water Tank Setup - 1-Tank System vs. 2-Tank System vs Tankless
I did a quick search on this topic but could not find any relevant results, so I've posted a new topic.
We are building our home right now and need to decide on what type of hot water heating system we will be using.
4 Full Baths (including master with 55 Gallon tub and separate shower)
1 Laundry Washer
12 Hot Water Taps at Sink Locations
There are only two of us in the house now, but expectation is there to be 3 or 4 in the near future.
From my understanding my options are (Gas Heaters):
1.) 75 Gallon Tank set at lowest heat setting
2.) Two smaller tanks run in series with each other. First one set at lowest setting, Second one set at desired hot water temperature.
3.) Tankless system.
When I brought up the Tankless system with my plumber, he said that the maximum load requirement of the home will likely be two high for one Tankless system. We would likely need two tankless heaters. Also, we have very hard water here in Edmonton, Alberta and the tankless system would need constant maintenance.
My main questions are, will there be a big difference in running costs between option 1 and 2? Also, I've heard that running option 2 should give me more hot water then option 1?
Any advice would be much appreciated.