We bought a Costway portable air conditioner (EP24937) and had questions about it. We called the Costway customer service number (213-401-****) and it was nearly impossible to understand the woman who answered because there was a loud man's voice in the background that drowned out her voice. It was like trying to hear one person talking in a crowd of people. talking. User's recommendation: air conditioner cools very well, but terrible customer service support.