Clear Opening
Sq. Ft. of Unit Frame Dim.
Clear Opening
Sq. Ft. of Unit Frame Dim.
Sq. Ft. Clear Opg.
Sq. Ft. Clear Opg.
Sq. Ft. D.L.O.
Sq. Ft. Vent
Sq. Ft. D.L.O.
Sq. Ft. Vent
Product #
Product #
Width
Height
Width
Height
New Construction Double Hungs (All Glastra) Continued MDH3650 6.38 37-23/32" 24-3/8" 12.30 6.38
New Construction Double Hungs (All Glastra) MDH1630 1.18 13-23/32" 12-3/8"
17.15
2.04
1.18
4.31
MDH3656
7.17 37-23/32"
27-3/8"
13.77
7.17
18.88
MDH1636
1.46 13-23/32"
15-3/8"
2.51
1.46
5.04
MDH3660
7.33 37-23/32"
28"
15.23
7.33
20.61
MDH1640
1.75 13-23/32"
18-3/8"
2.97
1.75
5.77
MDH4030
3.76 43-23/32"
12-3/8"
7.54
3.76
11.71
MDH1646
2.04 13-23/32"
21-3/8"
3.44
2.04
6.50
MDH4036
4.67 43-23/32"
15-3/8"
9.26
4.67
13.69
MDH1650
2.32 13-23/32"
24-3/8"
3.90
2.32
7.23
MDH4040
5.58 43-23/32"
18-3/8"
10.97
5.58
15.67
MDH1656
2.61 13-23/32"
27-3/8"
4.36
2.61
7.96
MDH4046
6.49 43-23/32"
21-3/8"
12.69
6.49
17.65
MDH1660
2.67 13-23/32"
28"
4.83
2.67
8.69
MDH4050
7.40 43-23/32"
24-3/8"
14.40
7.40
19.63
MDH2030
1.69 19-23/32"
12-3/8"
3.14
1.69
5.79
MDH4056
8.31 43-23/32"
27-3/8"
16.12
8.31
21.61
MDH2036
2.11 19-23/32"
15-3/8"
3.86
2.11
6.77
MDH4060
8.50 43-23/32"
28"
17.83
8.50
23.59
MDH2040
2.52 19-23/32"
18-3/8"
4.57
2.52
7.75
MDH2046
2.93 19-23/32"
21-3/8"
5.29
2.93
8.73
MDH2050
3.34 19-23/32"
24-3/8"
6.00
3.34
9.71
MDH2056
3.75 19-23/32"
27-3/8"
6.71
3.75
10.69
MDH2060
3.83 19-23/32"
28"
7.43
3.83
11.67
MDH2630
2.21 25-23/32"
12-3/8"
4.24
2.21
7.27
MDH2636
2.75 25-23/32"
15-3/8"
5.21
2.75
8.50
Clear Opening
Sq. Ft. of Unit Frame Dim.
Sq. Ft. Clear Opg.
MDH2640
3.28 25-23/32"
18-3/8"
6.17
3.28
9.73
Sq. Ft. D.L.O.
Sq. Ft. Vent
Product #
Width
Height
MDH2646
3.82 25-23/32"
21-3/8"
7.14
3.82
10.96
MDH2650
4.35 25-23/32"
24-3/8"
8.10
4.35
12.19
New Construction Double Hungs (Glastra/Wood) MNCDH1630 1.18 13-23/32" 12-3/8" 2.04
MDH2656
4.89 25-23/32"
27-3/8"
9.06
4.89
13.42
1.18
4.31
MDH2660
5.00 25-23/32"
28"
10.03
5.00
14.65
MNCDH1636
1.46 13-23/32"
15-3/8"
2.51
1.46
5.04
MDH2830
2.38 27-23/32"
12-3/8"
4.61
2.38
7.77
MNCDH1640
1.75 13-23/32"
18-3/8"
2.97
1.75
5.77
MDH2836
2.96 27-23/32"
15-3/8"
5.66
2.96
9.08
MNCDH1646
2.04 13-23/32"
21-3/8"
3.44
2.04
6.50
MDH2840
3.54 27-23/32"
18-3/8"
6.71
3.54
10.39
MNCDH1650
2.32 13-23/32"
24-3/8"
3.90
2.32
7.23
MDH2846
4.11 27-23/32"
21-3/8"
7.75
4.11
11.70
MNCDH1656
2.61 13-23/32"
27-3/8"
4.36
2.61
7.96
MDH2850
4.69 27-23/32"
24-3/8"
8.80
4.69
13.02
MNCDH1660
2.67 13-23/32"
28"
4.83
2.67
8.69
MDH2856
5.27 27-23/32"
27-3/8"
9.85
5.27
14.33
MNCDH2030
1.69 19-23/32"
12-3/8"
3.14
1.69
5.79
MDH2860
5.39 27-23/32"
28"
10.90
5.39
15.64
MNCDH2036
2.11 19-23/32"
15-3/8"
3.86
2.11
6.77
MDH3030
2.73 31-23/32"
12-3/8"
5.34
2.73
8.75
MNCDH2040
2.52 19-23/32"
18-3/8"
4.57
2.52
7.75
MDH3036
3.39 31-23/32"
15-3/8"
6.56
3.39
10.23
MNCDH2046
2.93 19-23/32"
21-3/8"
5.29
2.93
8.73
MDH3040
4.05 31-23/32"
18-3/8"
7.77
4.05
11.71
MNCDH2050
3.34 19-23/32"
24-3/8"
6.00
3.34
9.71
MDH3046
4.71 31-23/32"
21-3/8"
8.99
4.71
13.19
MNCDH2056
3.75 19-23/32"
27-3/8"
6.71
3.75
10.69
MDH3050
5.37 31-23/32"
24-3/8"
10.20
5.37
14.67
MNCDH2060
3.83 19-23/32"
28"
7.43
3.83
11.67
MDH3056
6.03 31-23/32"
27-3/8"
11.42
6.03
16.15
MNCDH2630
2.21 25-23/32"
12-3/8"
4.24
2.21
7.27
MDH3060
6.17 31-23/32"
28"
12.63
6.17
17.63
MNCDH2636
2.75 25-23/32"
15-3/8"
5.21
2.75
8.50
MDH3230
2.90 33-23/32"
12-3/8"
5.71
2.90
9.24
MNCDH2640
3.28 25-23/32"
18-3/8"
6.17
3.28
9.73
MDH3236
3.60 33-23/32"
15-3/8"
7.01
3.60
10.81
MNCDH2646
3.82 25-23/32"
21-3/8"
7.14
3.82
10.96
MDH3240
4.30 33-23/32"
18-3/8"
8.31
4.30
12.37
MNCDH2650
4.35 25-23/32"
24-3/8"
8.10
4.35
12.19
MDH3246
5.01 33-23/32"
21-3/8"
9.60
5.01
13.93
MNCDH2656
4.89 25-23/32"
27-3/8"
9.06
4.89
13.42
MDH3250
5.71 33-23/32"
24-3/8"
10.90
5.71
15.49
MNCDH2660
5.00 25-23/32"
28"
10.03
5.00
14.65
MDH3256
6.41 33-23/32"
27-3/8"
12.20
6.41
17.06
MNCDH2830
2.38 27-23/32"
12-3/8"
4.61
2.38
7.77
MDH3260
7.11 33-23/32"
30-3/8"
13.50
7.11
18.62
MNCDH2836
2.96 27-23/32"
15-3/8"
5.66
2.96
9.08
MDH3630
3.24 37-23/32"
12-3/8"
6.44
3.24
10.23
MNCDH2840
3.54 27-23/32"
18-3/8"
6.71
3.54
10.39
MDH3636
4.03 37-23/32"
15-3/8"
7.91
4.03
11.96
MNCDH2846
4.11 27-23/32"
21-3/8"
7.75
4.11
11.70
MDH3640
4.81 37-23/32"
18-3/8"
9.37
4.81
13.69
MNCDH2850
4.69 27-23/32"
24-3/8"
8.80
4.69
13.02
MDH3646
5.60 37-23/32"
21-3/8"
10.84
5.60
15.42
MNCDH2856
5.27 27-23/32"
27-3/8"
9.85
5.27
14.33
MNCDH2860
5.39 27-23/32"
28"
10.90
5.39
15.64
NOTE: For the most up-to-date data, please visit kolbewindows.com Shaded units meet most national building codes for emergency escape and rescue requirements.
MNCDH3030
2.73 31-23/32"
12-3/8"
5.34
2.73
8.75
Forgent ® Series 71
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