Upon arrival client stated system would not cool and have had high electric bills since installation. Also stated system was replaced again with larger system (5) ton after initial unit was installed with a 3.5 ton. Advised client that the duct system is not designed for a 5 ton duct system. The returns are collapsed and Supplys clearly have holes all in them and can feel the cold air all under home. There is roughly 14” of clearance under home and can not fully access all duct work and would be highly recommended not to do repairs. Previous techs appeared to have over charged system to accommodate for lack of air flow according to high head pressures high subcool and low superheat! Compressor does not sound healthy and more than likely have an extremely short life operating like this! Due to lack of space and can have further issues in future as in rodents chewing duct work investment over time.Hime already has 1 mini split in addition that was built and recommended to have a multi p