Jimmy,
I would recomend getting a larger storage tank (50-75) where you are a family of four,when kids get older they will be the biggest offenders of depleting the water.
Sceondly you want a high recovery rate some where in the ball park of 80% of the tanks capacity to 1hr.or higher.
IMO
I like having the two seprate tank and boiler I belive it's more economical.
Jimmy if you want a hand let me know.
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