Citydude
Elite Member
I have 2 Hot water heaters side by side in my basement. After 35 years in construction, I learned they tend to go belly up at the worst times. At one time I was going to split them and do one side of my home (master bedroom and guest suite) with one and kitchen and kids side of the house on the other. I scrapped the plan and simply use one to preheat and the other to finish heating hot water. Works fantastic and never run out of HW.
I have used this system in my last 2 homes and have shown customers I built homes for this method. They all agree its worth the $1000-$1500 extra on a big project and go for it.
I also always install a sub panel upstairs to reduce # of home runs back to basement panel and put one HVAC in attic for second floor and first floor HVAC in basement.
Lastly, I try to get all customers to install whole house backup while we are under construction. Once i show them it is cheaper to do while under construction, its usually a "go".
Overkill, maybe but I really like it. My customers often are going for more sophisticated mechanicals and saving money on less square feet.
The high end, large family homes here have 2 water heaters.