Hello. First time poster here with a question about an amitrol boilermate 41gal heater. We had it installed because during winter in NH we could barely get two showers out of the existing tankless coil, never mind fill the tub. After it was installed hot showers definitely aren't a problem, but filling the tub still is. If we try to draw a bath in the evening the hot water runs at about 112F and is cold by the time the tub is full. This is with no mix. I found it odd that we couldn't draw a full bath hotter than about 105. Then, once the tank reheats, the water is the 120+ degrees it's supposed to produce. Is it possible something is set wrong? I was under the impression the system would keep the tank water at 120. I would like to be able to fill the tub faster by increasing the mix. Is there a way I can force it to fire before starting the bath? It's possible the boiler can't keep up but the tub isn't even close to 40 gallons. Any insight would be much appreciated.