Further sealing against air infiltrationmust be done alter the
Wall Sleeve Installation
The wall sleeve may be installedfrom either the inside or outsideof the building.
Some builderswill attach the wall sleeve to the support wall through the side supportangles whether they are inserting the sleeve from the outside or the inside.Othem willuse the side angles simplyas a locating"stop"to achieve the appropriatedimension while shootingfasten- ers through the sides of the wall sleeve into the supporting wall. In either case, the wall sleeve must be fastened to the supporting wall and not to the finished wall.
The sleeve may extend farther than 1"beyond the finished wall, but reaching the perimeter of the opening from inside
for sealing becomes increasinglydifficult.In any case, adequate safety precautions must be considered to
protectpersonnel.
Instailing Wall Sleeve from Inside
The most popular method of installingthe wall sleeve is from the inside of the buildingwith the weather seal applied from the outside as the finish wall is applied.
Instalflng Wall Sleeve from Outside
In many
being constructed.The
will exceed the thicknessof the outside finish wall bythe recommended 3/8" to 1"dimension.
For example, if the supportingwall is concreteblockwith a brickfacing, there is usually a space between the block and the brick.This space dimension must be added to the width of the brick (plus 3/8" to 1") so that when the sleeve is inserted intothe blockwall opening, up to the angles and fastened to the blockwall before the brick is installed, the sleeve wilt protrude beyond the finished brickby 3/8" to 1", as needed for caulk sealing.
The same applies if the supportingwall iswood frame. One may insert the sleeve from the outside up to the angles located on each side, allowing for the thicknessof sheathing, finish siding, and caulk sealing.
Recessed Sleeves
In some applications, where either the buildingwalls are very thick (over 16") or architecturaldesign dictates,units
can be recessed. Avoid recessing the wall sleeve ifthe wall opening is required to be the same size as the wall
sleeve opening. However, if the wall opening can be larger in verticaldimension than the wall sleeve so that the
bottomcan rest on a sill that is at least 2" higher than the bottomof the wall opening, some recessing is permitted.
This sillshould be recessed further than the sleeve by 3/8" to 1"to
The top of the wall opening should be above the top of the wall sleeve by a dimension equal to or greater than the amountof the recess in order to avoid restriction of the condenserdischargeair.
Sealing/Weatherproofing Wall Sleeves
Ahighgrade
shouldalso be applied around the sleeve'sperimeter and the finishedinteriorwall.
Final sealing against air infiltrationmust be done alter the
protection,the space between the unit and the wall sleeve shouldbe sealed on all sides with a bead of sealant.
Wall Sleeve Dimensions (in.)
<.. 1or 3_/4
.16,.._15 or 12_
I
i
45
I
_t._ !
z9- |
Flar_es may b_ assembl_l
1"or 5_/4" from this e_e of the elc_v_
Figure 2