Dryer receptacles

After reading a bunch of threads and not finding an answer, does anyone have a simple answer for this?: What is the difference between the flush mount and surface mount electric dryer receptacles? I went to pick up a few things as I get further along with an addition, and there were two different 4-wire 30A dryer receptacles. Can't figure out which would be better. I guess I lean towards the flush-mount, but then what type of electrical box is needed? The receptacle seemed too big for a normal single-gang type box. What does the faceplate look like? Does the box get installed off the floor a certain distance? Does it matter? Thank you if you can help.

 

Surface mount receptacles come as a self-contained unit and can be installed without the need for a separate junction box. Flush mount receptacles have to be installed in a junction box, usually an extra-deep 4" square box with a double gang raised ring.

Code does not require a specific distance off the floor, but when installing consider locations that would be possible vs. impossible to reach with the dryer sitting there. Something like 24-30" off the floor you can reach over top of the dryer.

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The flush mount is a cleaner look, but may require fishing a cable into the wall.

 

This box maybe a better choice if this is new construction,use a 2 gang plaster ring with it.
2-1/8" Deep, 4" Square Box with a Flat Vertical Bracket and (9) 1/2" Side Knockouts and (5) 1/2” Bottom Knockouts
Geo

 

Either in wall or surface mount, go with a 4 11/16" box.

Leviton | 30 Amp Dryer Receptacle | Home Depot Canada

IBERVILLE | Sq. Range/Dryer Box 2-1/8 In. Deep KO | Home Depot Canada

 

I think the easiest way to look at it is like this. If you have a bare concrete wall such as in an unfinished basement, use the surface receptacle. If you have a framed wall that will be finished, use the flush receptacle. Of course, you could still use a 1900 box with flush receptacle on a bare concrete wall, but it wouldn't make much sense to spend more to do it that way.

 

Thank you for the help. I picked up a 42 cu in 2-gang box by Slater, sold as a range/dryer box, to go along with the flush-mount receptacle.