Air Vent B-144 Installation Instructions Download Page 1

Static Roof Vents

1.)

 POSITIONING THE VENTS ON THE ROOF 

Position the vents evenly spaced across the roof, below the ridgeline so that the vents can 

only be seen from one side of the house, yet no greater than 2 feet below the ridgeline.  

2.)

 DRILL THE GUIDE HOLE 

Adjust placement of the vents to avoid drilling through any rafters.  Drill a guide hole near the 

center position of each vent.  

3.)

 OUTLINING THE HOLE 

Mark correct diameter for the vent you have selected using the chart below. 

4.)

 CUTTING THE HOLE IN THE ROOF 

Using a saber saw, cut and remove all the roof shingles (and deck) inside the diameter circle you 

have marked. Next, cut back approximately 1-inch of the SHINGLES ONLY out of the top half of 

the hole to allow room f

or placing and positioning the flang

e. 

5.)

 POSITIONING THE BASE 

Mak

e sure the base flange pa

rallels the ridgeline of the roof.

 Slip the upper half of the flange 

under the shingles. Center the unit over the hole.  When installing the B-144 make sure the dome

is level with the roof line. For the 

RVP61, 

SLP61 AND SQP61 the shingles should stop at the 

midpoint 

of the flange while still covering the nails. For all static roof vents the shingles should lay on top

of the flange all the way down to the lower side of the opening. The flange from this point should 

rest on top of the shingles.

attaching the vent to the 

If nail holes are provided in the vent they should be used for 

roof deck.  

6.)

 SECURING THE BASE 

Attach the flange securely to the roof with at least 8 gal

vaniz

ed roofing nail

s. Nails should be at 

least 2

"

 long and should penetrate the vent, shingles and decking. Use a nail in each corner of 

the flange and along the middle of each side of the 

vent. Use caulk to seal around each nail. If 

flange 

ribbing is present, vents should be shingled do

wn to side flange 

ribbing only.

Size of Opening 

Model

Description

Net

Free Area

Roof 

Pitches

Diameter of 

Opening 

B-144

round plastic or metal

144 sq. inches

3/12 to 8/12

14"

SLP 61

slant plastic

61 sq. inches

3/12 to 12/12

9"

SLA / RVG55

slant aluminum / galvanized

50 sq. inches

3/12 to 12/12

8"

RVAL50 / RVGL50

slant aluminum / galvanized

50 sq. inches

3/12 to 12/12

8"

                                                                                                                                                  

         

SQP61

/RVP61           

        

s

quare plastic

                      

61 sq. inches

     

3/12 to 8/12

    

9"

               

RVA51 / RVG51

square aluminum / galvanized

50 sq. inches

3/12 to 8/12

8"

               

RVA40 / RVG40

slant aluminum / galvanized

40 sq. inches

3/12 to 12/12

7-½"

               

RVHC51 /

               

RVG53

               

square high collar

               

aluminum or galvanized 

50 sq. inches

3/12 to 8/12

8"

               

UH50 / 550

square aluminum / galvanized

50 sq. inches

3/12 to 8/12

8"

Part No.

 18

943

Use the following chart to determine proper size of opening, based on the model of vents you are installing.  

INSTALLATION INSTRUCTIONS

               

SLP150

slant plastic

150 sq. inches

3/12 to 12/12

13" x 13" square

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