I had my pool heater (pentair Mastertemp 125) installed today, and the installer placed the heater with exhaust (side exhaust) facing the pool wall. It is about 8 inches away from the pool wall, and the exhaust is directed upwards. This heater is a propane heater, and I am concerned about the heat from the exhaust damaging the pool wall. The manual shows that the exhaust, when placed outside (which it is), must be 6" from any wall, but they show a brick wall. The heater has not been operated yet since the gas company has not completed their end, so I do not know how hot the exhaust actually is. Should I be concerned? Any thoughts please.