We have a 31/2 ton heat pump unit. It never shuts off it the temp outside is 100 or above It may run for 8 hours or more and never reach a temp in the house to turn off .the unit is 9 mo old in a new construction home that is well insulated and has energy efficient windows as well. Will it be more energy efficient to install a 4 ton unit that will cycle? Our home is just under 1700 sq feet. It has been gassed air ducts have been enlarged also. What next?

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Originally Posted by 1234teresa

we have a 31/2 ton heat pump unit. It never shuts off it the temp outside is 100 or above It may run for 8 hours or more and never reach a temp in the house to turn off .the unit is 9 mo old in a new construction home that is well insulated and has energy efficient windows as well. Will it be more energy efficient to install a 4 ton unit that will cycle? Our home is just under 1700 sq feet. It has been gassed air ducts have been enlarged also. What next?

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Most systems are designed now days to provide a 20 degree TD. That is total differential between the indoor temp and the outdoor temp. Like 100 degrees outside the best you will get inside is 80 degrees.