01-0275-002 Calculation Procedures A,B,C,D
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Procedure A Winter Infiltration HTM
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1. Winter Infiltration CFM Envelope Evaluation #1 (Substandard/Poor - 289.3 CFM I
2.2 Air Changes per hour x 7875 Cubic ft. x .0167
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2. Winter Infiltration Btuh = 7001.7 BTUH I
1.1 x 289.3 CFM x 22 Degrees Winter TD
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13. Winter Infiltration HTM = 41.9 HTM I
7001.7 Btuh / 167 Sq.Ft of total Glass & Door areas
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Procedure B Summer Infiltration HTM
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11. Summer Infiltration CFM Envelope Evaluation #1 (Substandard/Poor)_ 105.2 CFM I
.8 Air Changes per hour x 7875 Cubic ft. x .0167
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12. Summer Infiltration Btuh = 1620.2 BTUH I
1.1 x 105.2 CFM x 14 Degrees Summer TD
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13. Summer Infiltration HTM = 9.7 HTM I
1620.2 Btuh / 167 Sq.Ft of total Glass & Door areas
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Procedure C Latent Infiltration -�
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--------- -- 4006.4 BTUH
0.68 x 56 grains difference @ 50 RH x 105.2 CFM _ - -�
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Procedure D Equipment Sizing '
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1. Sensible Sizing Load
Sensible Ventilation Load = ,'rO.J BTbh- l _
1.1 x 50 VENT CFM x 14 Degrees Summer TD + 14352.6 BTYH I
Sensible Load for Structure = 15112.6 BThh- 1 -
Sum of Ventilation & Structure Loads x 1.0 RSN I
Rating & Temperature Swing Multiplier (3.0°@ 95°) = 15322 ,6 BTbh i
Equipment Sizing Load - Sensible
2. Latent Sizing Load I
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Latent Ventilation Load = 1904.0 BTUH I
0.68 x 50 VENT CFM x 56 differance + 920.0 BTUH I
Internal Loads = 230 Btuh x 4 people + 4006.0 BTUH I
Infiltration Load from Procedure C = 6830.4 BTUH I
Equipment Sizing Load - Latent
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