®
Oval Access Doors
for Round & Square Duct
Access doors are used in duct systems for many reasons. Entry is often required
to facilitate duct cleaning, examine equipment, or to test, repair, or troubleshoot
system components.
Round Access Doors For Spiral Duct
Self-adhesive
template for proper
installation
No frame for
easy install
Closed cell
neoprene
gasket
Conical spring
located between
inner and outer plates
for ease of installation
20 ga.
galvanized
steel
Strengthening
Ribs
Specialty metals
available by
special order
Designed to withstand 20 W.G
positive and 10 W.G. negative
Insulated and Uninsulated Doors Available
Code
Description
21135
21137
21138
21144
21146
21148
21151
21154
21101
21103
21104
21110
21112
21114
21117
21120
MRADI48-7
MRADI48-11
MRADI48-14
MRADI812-14
MRADI812-18
MRADI812-22
MRADI216-18
MRADI1216-24
MRADU48-7
MRADU48-11
MRADU48-14
MRADU812-14
MRADU812-18
MRADU812-22
MRADU1216-18
MRADU1216-24
4X8-7RD Insulated Access Door
4X8-11RD Insulated Access Door
4X8-14RD Insulated Access Door
8X12-14RD Insulated Access Door
8X12-18RD Insulated Access Door
8X12-22RD Insulated Access Door
12X16-18RD Insulated Access Door
12X16-24RD Insulated Access Door
4X8-7RD Uninsulated Access Door
4X8-11RD Uninsulated Access Door
4X8-14RD Uninsulated Access Door
8X12-14RD Uninsulated Access Door
8X12-18RD Uninsulated Access Door
8X12-22RD Uninsulated Access Door
12X16-18RD Uninsulated Access Door
12X16-24RD Uninsulated Access Door
Flat Access Doors For Rectangular Duct
No frame for
easy install
Self-adhesive template
for proper installation
Closed cell
neoprene gasket
Strengthening
Ribs
20 ga.
galvanized steel
Specialty metals
available
Conical spring
located between
inner and outer plates
for ease of installation
Qty Per Weight
Box
(lbs)
Item #
10
10
10
10
10
10
5
5
10
10
10
10
10
10
5
5
12
12
12
35
35
35
29
29
12
12
12
35
35
35
29
29
Insulated and Uninsulated Doors Available
Code
Description
Qty Per
Box
Weight
(lbs)
21177
MFADI48
4X8 FLAT Insulated Access Door
10
12
21178
MFADI812
8X12 FLAT Insulated Access Door
10
35
21179
MFADI1216
12X16 FLAT Insulated Access Door
5
29
21170
MFADU48
4X8 FLAT Uninsulated Access Door
10
12
21171
MFADU812
8X12 FLAT Uninsulated Access Door
10
35
21172
MFADU1216
12X16 FLAT Uninsulated Access Door
5
29
Item #
Designed to withstand 20 W.G positive and 10 W.G. negative
High Temperature Access Doors (2000 Degree)
Stick-On Template
for Cutting Hole
Easy Slide-In
and Fasten with
Wing Nuts
Single Unit with
No Pieces to
Assemble
No frame for easy install
HighTemperature
2000ºF Ceramic
Gasket
Black Iron layer
for grease duct
applications
Designed to withstand 20
W.G positive
QSD Access Doors
Code
Description
Qty Per
Box
Weight
(lbs.)
21190
MHTAD2000804
2000 Degree Door Only 8x4
10
16
21191
MHTAD201208
2000 Degree Door Only 12x8
10
41
21192
MHTAD201612
2000 Degree Door Only 16x12
5
36
21195
MHTADC200804
2000 Degree Door w/Plate 8x4
10
35
21196
MHTADC201208
2000 Degree Door w/Plate 12x8
10
70
21197
MHTADC201612
2000 Degree Door w/Plate 16x12
5
59
Optional FSB Cover Plate with Easy Remove Handle is available
Also available for round duct
Patent Pending
Quick snap
fasteners
One door fits all sizes
of spiral duct from
10” diameter and up
Proprietary foam
gasket ensures a
tight seal
One piece door
design for easy
alignment in
duct opening
Stick-on cutting
template supplied with
each door
Item #
Stainless Steel
construction for
corrosion resistance
Item#
Code
Description
Quantity
7300
QSD1006
10x6 Quick Snap Door
10/Box
Green Product! The QSD has 60% less steel content
than standard two piece access doors
Designed and tested for
positive static pressure
applications only!
Featured Products
November 2010