Being wrong is sometimes right

[glentre]

When building my 1,100 sq ft garage 7 yrs ago, I oversized the heat pump, using a 3 ton unit and maximum strip heaters in order to have enough capacity to serve an adjacent area in the future which I never did. Oversizing is generally a bad idea as the unit will cycle too often and cause uncomfortable conditions, primarily higher humidity with the unit running in the summer. ( I do run a separate dehumidifier full time except in the winter)

I have four antique cars that I maintain myself so I rarely work on any major projects requiring me to be in the garage all day or for several days at a time. While in the garage often, I'm usually only there for a few hours at a time. Turns out the oversized unit suits my schedule very well. Even on the hottest summer or coldest winter days, I can cool or heat the space very quickly and know that I don't need to leave the system running at all when the garage is not in use. I can get it comfortable in a matter of minutes no matter what the outside temperature is.

While oversizing is a higher initial investment and does not produce optimal ambient conditions, there are applications where being wrong sometimes ends up being right. It was for me.

Glen

 

[PoorUB]

Properly insulated a 2 ton unit would have been plenty and still brought the temps down fast.

I have a 900 sqft garage with 1-1/2 tons of cooling. It will cool noticeably in a half hour, no matter the outdoor temps. So I would argue about being right! your system works, but not efficiently and I doubt it removes humidity as well as a properly sized system. I have swapped out 120,000 BTU furnaces and put in 60,000 BTU units. The customer claimed the old unit worked fine. Just because it seems to work, doesn't mean it is right.