I have a 6ft spa tub that I have never been able to comfortably fill with hot water because I only have a 50 gal heater. I have a four bedroom house with a family of five including three teens and do not have any problems with showers, washer, etc. I want to increase my hot water supply but have some limiting factors:
1. Current hot water heater is a 50gal lowboy model in a fairly tight crawl space.
2. My tub does not have a convenient area to install a tankless heater and I am not looking for a complete bath remodel to remove tile, etc.
I considered installing a pair of 50gal lowboys and seem confused by what I have read regarding series vs parallel. I believe I would want a parallel installation but thought I would post this for some advice.
I also need to replace my pressure tank and house filter. My water suply is well fed.