It was defective

I bought a portable air conditioning system the other week and it turned out to be defective.

When I went to turn on the portable air conditioning system after buying it, it made a loud noise and then fully stopped working.

I had to return the portable air conditioning system to the store that I bought it from and explain to them what happened. While it took a bit to get them to give me a refund, they finally did. And with that I went and bought another brand of portable air conditioning system that works great! I did not want to even mess with the same brand of portable air conditioning system. Because if that was defective and made it to the shelves of stores, that tells me that the HVAC brand is cheap and anything else from them would most likely be defective as well. Which is why I waited for my refund to come through and then went to another store and bought another brand of portable air conditioning system. This new portable air conditioning system that I have really cools my bedroom nice in the super hot summer months of the year. It makes it so that I do not have to run my central heating and air conditioning system at night. Which in turn, saves on energy use and I can save money when the energy bill comes in the mail the following month. I wish I had just spent the extra few bucks and bought this brand of portable air conditioning system in the first place, but I was trying to save money.
air purification system