Yes! The temperature will drop down faster, recover from door openings quicker, and be able to get colder than 36F. Additionally, you may actually save money in the long run even though you spent more for a larger air conditioner up front.
For example, our recommendation for an 8x8x8 room is 12,000 BTU's:
- If you bumped up one or two levels you'd be at 15,000 BTU's or 18,000 BTU's. In both cases, you get more surface area to transfer cold, so you can run in Energy Saver mode most of the time (it's best to run in standard mode an hour before and after loading up and if it's extremely hot outside). That could save you $15/month, which over a few years will have paid for the extra cost of the bigger air conditioner. 15,000 BTU's is good, and 18,000 BTU's is even better.
- If you wanted to go up THREE levels to 24,000 BTU's you wouldn't save more money in electricity, but you could drop the temperature even faster and could go even colder.
Also, 18,000 BTU and 24,000 BTU air conditioners both run on 220 volts. That means you have less amps running on each leg of your power cord and your compressor will run more smoothly.