Answer: 2.02.5 ton Explanation: Depends on the age of the home, the quality of the insulation, the seals on the window and several other factors. Don't base the size of the system on square footage alone. Calculating a heat load or Manual J is recommended. 
TemperaturePro San Antonio 
Answer: 2.53 ton Explanation: Most people are comfortable around 450600 square feet per ton. That's factoring in that it's well insulated and there other excessive heat factors. 
Kair 
Answer: 1.52.0 ton Explanation: You have to do a heat load to be 100% right if you are not measuring you are guessing. 
Arizona's Best Heating & AC, Inc. 

ProMatcher 
Answer: 2.53 ton Explanation: Depends on how much insulation, windows etc. 
Fix My AC Inc 
Answer: 2.53 ton Explanation: There are alot of different factors that play a role in sizing equipment. A load calculation on the home is the best way to find the proper size of equipment to best fit your homes needs. 
Dr Heat & Cool Comfort Experts 
Answer: 2.02.5 ton Explanation: Then you need to do a heat calculation to be sure. The R value of the windows, walls, floor and ceilings are very critical. 
Kohler Heating and Air Conditioning 

ProMatcher 
Answer: Not sure Explanation: We do not guess any size of Air conditioning system we perform an energy load calculation as required by our Building Come Manuel G 
Certified Quality Air Conditioning Inc 
Answer: 3.03.5 ton Explanation: Climate and insulation are the key factors 
123HVAC of Long Island 
Answer: 3.54.0 ton Explanation: calculations of house reveals the size needed 
Climate Creations LLC 