In a word . . . yes.
It is important to get the correct size unit to ensure optimum performance and minimal running costs.
The question is, how do you establish what is correct size unit?
Your specialist air conditioning and heating specialist will visit your site and calculate the heating and cooling loads – taking into account the specific conditions of your home or building ensuring you get the perfect size unit.
Incorrectly sized systems under perform, dramatically reduce the life of the system, can void warranties and increase running costs.