Product Overview

CAPACITIES
NOTE: For ows in excess of those shown below, consult with Maxitrol Company.
Model Number and
Pipe Size
Flow Rate in
CFH (m
3
/h)
1000
(28.3)
1500
(42.5)
2000
(56.5)
2500
(70.8)
3000
(85.0)
3500
(99.0)
5000
(142)
6000
(170)
7000
(198)
10000
(283)
11000
(311)
CSA
Listed
Min. Flow
Applies to
MR212’s
only
MR212D*
MR251D
1 x 1
Pressure Drop in inches w.c. (Pa)
1.9
(475)
2.9
(725)
4.9
(1225)
6.2**
(1550)
--
-- -- -- -- -- --
2250
25-300
(0.71-8.5)
1¼ x 1¼
1.7
(425)
2.3
(575)
3.1
(775)
4.8
(1200)
5.9**
(1475)
2750
1½ x 1½
1.7
(425)
2.2
(550)
2.9
(725)
3.9
(975)
5.4
(1350)
3000
MR212E*
MR251E
1½ x 1½
-- --
1.9
(475)
2.4
(600)
2.9
(725)
3.5
(875)
6.0**
(1500)
-- -- -- -- 4750
25-300
(0.71-8.5)
2 x 2
1.9
(475)
2.1
(525)
2.4
(600)
2.7
(675)
5.5
(1375)
6.0**
(1500)
-- -- -- 5250
MR212G*
MR251G
2½ x 2½
-- -- -- -- --
1.9
(475)
2.2
(550)
2.6
(650)
3.0
(750)
6.1
(1525)
-- 10000
50-450
(1.4-12.7)
3 x 3 --
2.1
(525)
2.3
(575)
2.6
(650)
4.6
(1150)
5.6
(1400)
11000 --
*U.L. recognized
**PressureDropguresderivedfromCSAMaximumListedCapacitiesinfarrightcolumn(notowatcolumntop).
Model Number
and Pipe Size
Flow Rate in
CFH (m
3
/h)
6000
(170)
8000
(227)
10000
(283)
12000
(340)
14000
(397)
16000
(397)
18000
(510)
20000
(566)
22000
(623)
24000
(680)
27000
(765)
30000
(850)
Min. Flow
MR212J 4 x 4
Pressure Drop in
inches w.c. (Pa)
1.9
(475)
2.1
(525)
2.4
(600)
2.7
(675)
3.1
(775)
3.6
(900)
4.5
(1125)
5.4
(1350)
6.6
(1650)
7.8
(1950)
9.9
(2475)
12.4
(3100)
100-1000
(3.0-28.3)
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M/MR Series Literature