Are you working on a project and need to figure out what size PTAC will work best for the room you have? You definitely don’t want to end up with a packaged terminal air conditioning unit that isn’t powerful enough to cool your whole room, for obvious reasons. But you also want to be careful not to go too high, and not just because you’ll be paying more than you need to. If your PTAC cools the room too much, it won’t properly dehumidify the space and your room will be cool, but not as comfortable as it would be with a cooling unit of the proper size and power.
Check out the quick chart to help point you in the right direction.
BTU CHART BASED ON ROOM SIZE
| Room Size | BTU’s Needed | Room Size | BTU’s Needed |
| 150 sqft | 5,000 BTU’s | 700 sqft | 14,000 BTU’s |
| 250 sqft | 6,000 BTU’s | 1,000 sqft | 18,000 BTU’s |
| 300 sqft | 7,000 BTU’s | 1,200 sqft | 21,000 BTU’s |
| 350 sqft | 8,000 BTU’s | 1,400 sqft | 23,000 BTU’s |
| 400 sqft | 9,000 BTU’s | 1,600 sqft | 25,000 BTU’s |
| 450 sqft | 10,000 BTU’s | 1,900 sqft | 28,000 BTU’s |
| 550 sqft | 12,000 BTU’s | 2,700 sqft | 36,000 BTU’s |
The chart above is a reference tool only! Many different aspects will come in to play when sizing (example: windows, geographical location will need to be taken into consideration among other things) but if you need help trying to make sure you have the correct sized HVAC units we are here to help you.
