When you look at a COP like Co-efficiency of performance you’re always looking at where your energy is coming from. For instance, if you had a will take a resistance heat, It’s a one to one ratio for every dollar you put in you get a dollar ended you put out if you took an air to air heat pump you get 2.5 COP. Because for every dollar you put in they’re taking one point five out of the air to heat or cool and you’re getting another one from the utility company. With it with a geothermal heat pump system your trip getting three-quarters of your energy from the ground only one quarter from the utility company that COP from the ground is worth three at least three points if not four. We’ve got new heat pumps now that are coming in that are going to COPs of five and six so as this thing gets better to put it even more.

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