Yes, I've run an enterprise server stack on an old closet, with a home air conditioner venting into the warehouse. Even when the A/C unit died for three days on

Yes, I've run an enterprise server stack on an old closet, with a home air conditioner venting into the warehouse. Even when the A/C unit died for three days one summer (we had to keep the door open and run several fans), the servers, ranging from 3-7 years old, kept running. Far from optimal, but the systems stay up and the company stays in business.