I highly suggest Twin Parallel Water Heaters with complete bypass systems for each, over a single large water heater!
Normally, both water heaters do not die at the same time. And, when do they usually go? In the evening on the weekend or on a Holiday.
- Faster recovery time. (2@37+ gal/hour or 1@50+ gal/hour)
- If you do not need large amounts of hot water you can completely shut down one water heater. Energy Saving (Teenagers have gone off to collage)
- If one water heater fails on a Friday night you can completely shut that one down and still have Hot water until the weekday when a service call will be less expensive.
- Initial install cost is about the same for 2@40 gal w/bypass or 1@80 gal, including parts & supply’s.
- Try to find an 80 gal propane water heater in stock anywhere when you need one. (Most stores & plumbers do not have 80gal water heaters in stock.)
- Less expensive to replace 1@40 gal water heater then 1@ 80 gal.
- You will have a warning to start putting money aside to replace the second water heater, it will most likely need replacement in the next 6 months.
- 2@40gal uses 1.5 to 2 times the floor space of 1@80 gal water heater.
- Second 40 gal water heater will be in need of replacement most likely within the next 6 months. (Not a real CON in my book, see PRO #7.)
I can not think of any other CON’s.
I think the PRO’s out weigh the CON’s.
Even if they are connected in series I would personally like to have bypasses for both tanks. This way if one fails I can shut down the failed unit and still have Hot water while waiting for the other to be replaced.
Anyone else have any thoughts about this list?