1) Add tempering tank to preheat incoming cold water.
http://waterheatertimer.org/Tempering-tank.html2) Read product manual or call Bosch to make sure unit works with pre-heated incoming water. Some incoming water sensors will not trigger combustion is incoming water exceeds certain limit.
2a) Read product manual for required yearly/monthy maintenance.
Train wife to delime tankless yearly.
3) Install bigger gas meter.
4) Solve entire moneypit problem today for $325
http://waterheatertimer.org/How-to-install-gas-water-heater.html5) Don't install tankless unless you have a lot of money and time for headaches.
Don't believe promotional literature. Tankless promotion is BS for average do-it-yourself folks who want to save a buck on water heating. Estimated yearly saving of $100 means Tankless do not save money long term. All costs are energy: Purchase price and installation negates several years saving up front. One repair will negate another 5-8 years energy savings. By then you need new unit.
If you need further help, I’m available over the phone at
https://www.6ya.com/expert/gene_9f0ef4df2f9897e7
×