Cold as ice, perfect for my south facing shed office with large windows, somewhere around 6m2. It's fairly loud, but doesn't bother me, guess you could make an enclosure to reduce the sound, they all make sound. I wear noise cancelling headphones so it's not a deal breaker. The exhaust is 6", which may help some people looking vents, although 5" inside diameter would work too. Can change the fan speed on cooling mode which is nice.