First post here. I am in Washngton, DC. I am thinking to install a mini-split heat pump + cooling system in my basemnt which has no heat nor air conditioning. Is mini-split is a good chice for the climate at my location? I have heard that mini-split doesn't work too well when the outside temp is too low or too high. The problem is I can't find out what temp is too low or too high.
Washington DC's average low in Jan is 24F and average high in July is 89F.