mitch08
0
^^^Right. What jv92red said 
Assuming the same model heat pump is being used, it shouldn't matter if its on a separate pump / heater vs same pump / heater when it comes to the temp of the spa. Either way the spa is isolated and the heater is only heating the spa at that time. Unless like JV said, your pool guy is talking about a situation where you are keeping the waterfall affect on and tryig to heat. But I can't imagine that making much sense.
We should be able to settle this pretty easily. How many gallons is the spa going to be and how many BTUs is the heat pump going to be? That will tell the story.
Assuming the same model heat pump is being used, it shouldn't matter if its on a separate pump / heater vs same pump / heater when it comes to the temp of the spa. Either way the spa is isolated and the heater is only heating the spa at that time. Unless like JV said, your pool guy is talking about a situation where you are keeping the waterfall affect on and tryig to heat. But I can't imagine that making much sense.
We should be able to settle this pretty easily. How many gallons is the spa going to be and how many BTUs is the heat pump going to be? That will tell the story.