Typically a minimum of 7000 BTU is needed to cool a tiny area, whereas commercial units can reach up to 25,000 BTU and past. https://m.moneeshop.com/member/login.html?noMemberOrder=&returnUrl=http%3A%2F%2Fbbs.pku.edu.cn%2Fv2%2Fjump-to.php%3Furl%3Dhttps%3A%2F%2Ffinchleycentralairconditioning.co.uk