I’m glad you asked how to size a smoke eater, it is something you can learn to do pretty easily.

A few months ago I wrote an informative post that explains the basics:

http://www.breathepureair.com/airqualityblog/calculating-a-smoke-removal-system-coverage-area/

If you have any questions, please feel free to post them. Also, we don’t mind helping contractors or end users size their smoke removal systems. Even if you decide to do it yourself, you should still run everything by one of our staff members just to make sure. This can save time and money. We get almost no returns. Our sizing methods work every time. If you do not size a system correctly, customers may complain that the systems do not work, are too noisy or are creating drafts, and this can raise costs as equipment may need to be exchanged and extra shipping charges can add up.

My question is:

What do I need to know to be able to size smoke removal systems myself?

How do I know how many square feet an air cleaner will cover?

You have 11,200 cubic feet of air in your bar, this will require at least 1,866 cfm. If noise level is a concern at all, I would recommend sizing this for units running on a medium speed. There are several ways to achieve this, depending on your mounting options. I would need to know the amount of clearance you have above the drop ceiling in order to know what unit(s) would fit, but here are a few of popular choices:

Good:

Three Trion SE 800 E Smoke Eaters (2,400 cfm on high, 1,800 cfm on medium) - Requires only 7 inches of clearance above. These are electrostatic units with washable filters, primarily designed for capturing smoke particles. These unit hardwire into regular 115v, and come with a wall mount control switch, which is wired via low-voltage lead wires.

Good + :

Two SmokeMaster X-11Q (2,500 cfm on high, 1,800 cfm on medium) - Requires 14 inches of clearance above, can be hard wired or plugged in with included cord. Remote mount control is optional as are scented gel pads and carbon post filters.

Better :

Three EverClear Deluxe (3,450 cfm on high, 2,400 cfm on med.) Requires 20 inches of clearance. Unlike the units above, these use a pleated media filter that is 95% efficient and also has 44 pounds of gas phase media (granulated carbon and potassium permanganate blend) for superior odor reduction. You may notice that this unit is oversized, the reason is that as the pleated media filter loads, the airflow decreases. If I spec this for two units, you would not have nearly enough performance to effectively cover the area once the filters start to become dirty.

Best :

Two Smokeeter LS 2X2 Systems with optional carbon plenums ( 3,000 cfm on high, 2,400 cfm on medium.) Requires 22 inches of clearance above. This unit offers the best of both worlds by utilizing washable electronic filters and also offering granulated carbon for superior odor reduction. The LS is a completely concealed system which connects to the included ceiling tile vents with convenient and affordable duct. Wall remotes are included.

For information on all of these units, you can find them here:
http://www.breathepureair.com/commercial-smoke-eaters.html

I hope this helps head you in the right direction, if you have any other questions or need more details, please feel free to post your comments here.