Last year, I upgraded my entire HVAC system (partially located in the utility closet in my 1-bedroom condo). Because the new unit was larger than the old unit, I was forced to replace my water tank with a tankless unit. Despite the fact that I did quite a bit of research and Q&A with the company from whom I purchased the unit (Stiebel-Eltron), the tankless heater is not providing sufficient water pressure at the temperature at which it is set (117-120F).
Unfortunately, new space limitations make it impossible to revert back to a traditional water heater (with a tank) without replacing the entire HVAC unit, which would be extremely expensive.
The tank manufacturer suggested I upgrade to a more powerful unit, but I'm told this isn't possible because the power to my main breaker is less than what the tankless unit requires. The higher powered tankless unit requires 3x50 amps; at my main breaker I have 125 amps. The unit currently installed requires 2x50 amps.
Has anybody ever found themselves in a similar situation? Is this problem solvable?