Depending on private needs, you can expect to pay between ₤ 40-- ₤ 100 per unit for multiple units as component of a prepared maintenance agreement. https://pipewiki.org/wiki/index.php/At_Our_Business_The_Future_Of_Air_Conditioner_Installment:_Most_Recent_Technologies_And_Fads_We_Are_Devoted_To_Remaining_At_The_Forefront_Of_The_Heating_And_Cooling_Industry.