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84% EFFICIENCY (TYPE H)
HD101 13 0.7 13 44 8.8 4 17 1.2
HD151 13 0.7 20 44 8.8 6 25 2.9 13 0.7
HD201 13 3.3 26 44 8.9 8 33 5.2 17 1.3
HD251 13 0.7 33 44 9.2 10 44 9.2 21 2.1 14 0.9
HD301 13 0.7 39 44 9.4 12 25 3.1 17 1.3 13 0.7
HD401 17 1.4 40 44 9.8 15 34 5.6 22 2.5 17 1.4
302B 20 <1.0 25 90 9.8 6 50 3.1 25 <1.0
402B 20 <1.0 34 90 10.0 7 67 5.5 34 1.4 22 <1.0
502B 21 <1.0 40 90 10.4 9 84 9.1 42 2.3 28 1.1 21 <1.0
652B 27 1.1 40 90 10.8 12 55 4.1 36 1.8 27 1.1
752B 32 1.5 40 90 11.3 14 63 5.7 42 2.6 32 1.5
902B 38 2.2 40 90 11.7 17 76 8.3 50 3.8 38 2.2
992B 42 1.3 40 132 13.1 13 83 5.2 55 2.3 42 1.3
1262B 53 2.4 40 132 14.8 16 106 9.6 71 4.3 53 2.4
1532B 64 4.0 40 132 16.5 19 129 15.7 86 7.1 64 4.0
1802B 76 6.0 40 132 18.3 23 101 10.7 76 6.0
2002B 84 7.9 40 132 19.0 25 112 13.8 84 7.9
2072B 87 8.5 40 132 19.0 26 116 14.8 87 8.5
2342B 98 12.1 40 132 21.4 30 131 21.1 98 12.1
20°F ⌬T
Pressure Drops
40°F ⌬T30°F ⌬T
GPM
⌬P Ft
GPM
⌬P Ft
GPM
⌬P Ft
Hi Delta
Model
▼
10°F ⌬T
GPM
⌬P Ft
Minimum Flow
GPM
⌬P Ft ⌬T °F
Maximum Flow
GPM
⌬P Ft ⌬T °F
Flow Rates
85% EFFICIENCY (TYPE WH)
HD101 9 20 1.8 3.8 7 26 3.0 6.3 4 45 9.2 18.0 1-1/2”
HD151 13 20 1.8 3.8 10 26 3.1 6.3 6 45 9.2 18.1 1-1/2”
HD201 17 20 1.9 3.9 13 26 3.2 6.4 8 45 9.4 18.2 1-1/2”
HD251 21 20 1.9 3.9 16 26 3.2 6.5 9 45 9.6 18.5 1-1/2”
HD301 26 20 1.9 3.9 20 26 3.2 6.5 11 45 9.8 18.7 1-1/2”
HD401 34 20 2.0 4.0 26 26 3.3 6.6 15 45 10.3 19.1 1-1/2”
302B 13 40 2.0 5.1 10 52 3.3 8.3 6 90 9.8 23.7 2”
402B 17 40 2.0 5.1 13 52 3.4 8.4 8 90 10.0 23.8 2”
502B 21 40 2.1 5.2 16 52 3.5 8.6 9 90 10.4 24.2 2”
652B 28 40 2.2 5.3 20 55 4.1 9.7 12 90 10.8 24.7 2”
752B 30 42 2.6 6.0 20 63 5.7 12.8 14 90 11.3 25.1 2”
902B 30 51 3.9 8.7 20 76 8.4 18.6 17 90 11.7 25.5 2”
992B 28 60 2.7 5.2 20 83 5.2 9.7 13 132 13.1 23.6 2-1/2”
1262B 30 72 4.4 7.9 20 106 9.6 16.6 16 132 14.8 25.3 2-1/2”
1532B 30 86 7.1 11.9 20 132 16.5 27.0 20 132 16.5 27.0 2-1/2”
1802B 30 101 10.7 17.1 23 132 18.3 28.7 23 132 18.3 28.7 2-1/2”
2002B 30 112 13.9 21.6 26 132 19.0 29.5 26 132 19.0 29.5 2-1/2”
2072B 30 116 14.8 23.1 27 132 19.0 29.5 27 132 19.0 29.5 2-1/2”
2342B 30 132 21.4 31.8 30 132 21.4 31.8 30 132 21.4 31.8 2-1/2”
87% EFFICIENCY (TYPE H)
302BE 20 <1.0 26 90 9.8 6 52 3.3 26 <1.0
402BE 20 <1.0 35 90 10.0 8 69 6.0 35 1.5 23 <1.0
502BE 22 <1.0 40 90 10.4 10 87 9.7 44 2.5 29 1.1 22 <1.0
652BE 28 1.1 40 90 10.8 13 57 4.4 38 2.0 28 1.1
752BE 33 1.6 40 90 11.3 15 65 6.1 44 2.8 33 1.6
902BE 39 2.3 40 90 11.7 17 78 8.9 52 4.1 39 2.3
992BE 43 1.4 40 132 13.1 13 86 5.6 57 2.5 43 1.4
1262BE 55 2.6 40 132 14.8 17 110 10.3 73 4.6 55 2.6
1532BE 67 4.3 40 132 16.5 20 132 16.5 89 7.6 67 4.3
1802BE 78 6.5 40 132 18.3 24 104 11.5 78 6.5
2002BE 87 8.5 40 132 19.0 26 116 14.8 87 8.5
2072BE 90 9.1 40 132 19.0 27 120 15.8 90 9.1
2342BE 102 12.9 40 136 22.6 30 136 22.6 102 12.9
Less than Minimum Flow
Exceeds Maximum Flow
Exceeds Maximum Flow
MTS
Hi Delta
Model
▼
Soft
⌬T °F
GPM
⌬P Ft
SHL*
Water Hardness
20°F ⌬T
Pressure Drops
40°F ⌬T30°F ⌬T
GPM
⌬P Ft
GPM
⌬P Ft
GPM
⌬P Ft
Hi Delta
Model
▼
10°F ⌬T
GPM
⌬P Ft
Minimum Flow
GPM
⌬P Ft ⌬T °F
Maximum Flow
GPM
⌬P Ft ⌬T °F
Flow Rates
Less than Minimum Flow
NOTES: 98% efficiency available with condensing heat exchanger. (See Specialty Models on pg.4.) Minimum flow rates in closed systems may be reduced to a flow rate consistent with a 40°F ⌬T.
Maximum flow rates are limited by maximum acceptable velocity through the heat exchanger tubes and may be increased by 10% for closed heating systems.Pressure drop would increase 21%.
*SHL = Calculated at 100 feet effective pipe length.
Less than Minimum Flow
Exceeds
Maximum Flow
Medium
⌬T °F
GPM
⌬P Ft
SHL*
Hard
⌬T °F
GPM
⌬P Ft
SHL*
85% AFUE