As mentioned earlier, we have a 1525 sq ft walkout ranch with 1425 sq ft space in the walkout basement. They installed a 2.5 ton Heat Pump. Our builder showed us a Manual J with 23,250 required cooling btu and 28,400 recommended btu. This is a new home and we could not get desired tempature in the summer and froze this winter.
Is there a chance they undersized the unit for cooling, we live in Southern IL? Our builder says everything is fine.