BS EN 16798-7:2017 – TC:2020 Edition
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Tracked Changes. Energy performance of buildings. Ventilation for buildings – Calculation methods for the determination of air flow rates in buildings including infiltration (Modules M5-5)
Published By | Publication Date | Number of Pages |
BSI | 2020 | 177 |
This European Standard describes the methods to calculate the ventilation air flow rates for buildings to be used for energy calculations evaluation, heating and cooling loads. This European Standard applies to buildings with: – Mechanical ventilation systems (mechanical exhaust, mechanical supply or balanced system); – Passive duct ventilation systems for residential and low-rise non-residential buildings; – Combustion appliances; – Windows opening by manual operation; – Kitchens where cooking is for immediate use (including restaurants) This European Standard is applicable to hybrid systems combining mechanical and passive duct ventilation systems in residential and low-rise non-residential buildings. This European Standard applies to buildings smaller than 100 m and rooms where vertical air temperature difference is smaller than 15 K. The results provided by the standard are: ? the air flow rates entering or leaving a ventilation zone; – the air flow rates required to be distributed by the mechanical ventilation system, if present. This European Standard is not applicable to: – Buildings with kitchens where cooking is not for immediate use – Buildings with automatic windows (or openings) – Buildings with industry process ventilation. The definition of ventilation and airtightness requirements (as indoor air quality, heating and cooling, safety, fire protection…) is not covered by this standard. The following information can be found in other standards and technical reports: – guidance to estimate pressure drops in ducts (CR 14378:2002) Table 1 shows the relative position of this standard within the EN EPB package of standards.
PDF Catalog
PDF Pages | PDF Title |
---|---|
115 | National foreword |
126 | 1 Scope |
128 | 2 Normative references |
129 | 3 Terms and definitions |
130 | 4 Symbols and subscripts |
133 | 5 Brief description of the methods |
134 | 6 Calculation method, method 1 — Determination of air flow rates based on detailed building characteristics |
153 | 7 Method 2 — Determination of air flow rates based on statistical approach |
155 | 8 Quality control |
156 | 9 Compliance check |
157 | Annex A (normative)Input and method selection data sheet – Template A.1 General |
158 | A.2 References A.3 Input data method 1 A.3.1 Product description data A.3.2 Product technical data A.3.2.1 Discharge coefficient for vents, air terminal devices, windows A.3.2.2 Airflow exponent for vents, air terminal devices, windows |
159 | A.3.2.3 Combustion air flows factors A.3.2.4 Mechanical ventilation |
160 | A.3.3 System design data A.3.3.1 Supply air temperature control A.3.3.2 Exposure to wind A.3.3.3 Pressure coefficients associated to an air flow path |
161 | A.3.3.4 Difference of wind pressure coefficients A.3.3.5 Pressure coefficient of the cowl at roof height A.3.3.6 Correction coefficient for accounting for height of cowl above roof level |
162 | A.3.3.7 Ventilation effectiveness A.3.3.8 Airing factor A.3.3.9 Cross-ventilation factor |
163 | A.3.3.10 Number of window divisions A.3.3.11 Stack effect in passive and hybrid duct A.3.3.12 Distribution of vents A.3.3.13 Reference pressure for the envelope airtightness index A.3.3.14 Flow exponent through leaks A.3.3.15 Leakage coefficient of the ventilation zone A.3.3.16 Envelope leakage distribution |
164 | A.3.3.17 Typical internal doorway area A.3.4 Operating conditions data A.3.4.1 Maximum wind speed for cross-ventilation calculation A.3.4.2 Wind speed correction factors A.3.4.3 Ventilation system operation A.4 Input data method 2 |
165 | Annex B (informative)Input and method selection data sheet – Default choices B.1 General |
166 | B.2 References B.3 Input data method 1 B.3.1 Product description data B.3.2 Product technical data B.3.2.1 Discharge coefficient for vents, air terminal devices, windows |
167 | B.3.2.2 Airflow exponent for vents, air terminal devices, windows B.3.2.3 Combustion air flows factors |
168 | B.3.2.4 Mechanical ventilation B.3.3 System design data B.3.3.1 Supply air temperature control |
169 | B.3.3.2 Exposure to wind B.3.3.3 Pressure coefficients associated to an air flow path B.3.3.4 Difference of wind pressure coefficients |
170 | B.3.3.5 Pressure coefficient of the cowl at roof height B.3.3.6 Correction coefficient for accounting for height of cowl above roof level B.3.3.7 Ventilation effectiveness B.3.3.8 Airing factor B.3.3.9 Cross-ventilation factor |
171 | B.3.3.10 Number of window divisions B.3.3.11 Stack effect in passive and hybrid duct B.3.3.12 Distribution of vents |
172 | B.3.3.13 Reference pressure for the envelope airtightness index B.3.3.14 Flow exponent through leaks B.3.3.15 Leakage coefficient of the ventilation zone B.3.3.16 Envelope leakage distribution |
173 | B.3.3.17 Typical internal doorway area B.3.4 Operating conditions data B.3.4.1 Maximum wind speed for cross-ventilation calculation B.3.4.2 Wind speed correction factors B.3.4.3 Ventilation system operation B.4 Input data method 2 |