We are sorry to hear this ! Our portable air conditioners work best in enclosed, well insulated spaces. Though this unit can effectively cool a space of up to 700 sq. ft, room environment conditions such as ceiling height, sunlight, number of windows/ doors and level of insulation can affect cooling efficiency and there are ways to increase the capacity of these units. There could be other reasons for the unit to not cool- the temperature setting on the thermostat could be too high, or the exhaust hose may need re-installation.
Like any other electrical device, this AC will also create some sounds when operating due to the powerful compressor working to cool the space you need it to. The length of the exhaust hose is determined, keeping in mind the amount of air it can expel, and we do not recommend extending the exhaust hose.
Our customer support team will be able to look in to all your concerns and troubleshoot for you. Please do give us a call at 1-800-474-2147, Monday - Friday 8:30 AM - 5:30 PM (EST), or send us an email at usinfo @jmatek. com with the reference code number THA0620. We look forward to making this right for you. Thank You !