BS EN 14134:2019 pdf download.Ventilation for buildings – Performance measurement and checks for residential ventilation systems.
5.2 Checks and measurements conditions Checks and measurements conditions are as follows: — the mechanical ventilation system shall be switched on; — the system settings shall remain unchanged during measurements; — all external and internal doors, and windows shall be closed; — all other ventilation provisions such as externally and internally mounted air transfer devices should be set in their intended position which shall be recorded in the report; — as set points of control devices have an impact on the performances of the system, they shall be recorded in the report. — in the case of occupancy control or demand control and as the value of the relevant parameters has an impact on the performances of the system, these parameters or any overriding of the controls should be recorded in the report.
5.3 Sampling Checks and measurements for ventilation systems of the same type (example of types are natural ventilation, unidirectional ventilation or bidirectional ventilation) within apartments belonging to the same building or within houses belonging to the same housing estate can be performed on a sample of these apartments or houses. NOTE The basic assumption behind the authorization for sampling is that ventilation systems that belong to such groups (same type and same building or same housing estate) and that are considered together for the purpose of measurement and checks (for example because of same owner or same general contractor or same installer) have enough similarities to make sampling relevant. The sample size depends on the selected sampling level and the total number of apartments or houses of the considered group. Table 2 gives the sampling error for each sampling level for a level of confidence of 95 %. Table 3 gives the sample size as a function of the total number of apartments or houses for each sampling level. For total numbers of apartments or houses that are not in Table 3, the sample size is calculated using Formula (1).
7 Functional checks 7.1 General The purpose of the functional checks is to assess the completeness and operational ability of the ventilation system according to the design specification. The checks show whether the particular components of the system (e.g. fans, filters, heat exchangers) have been properly assembled and installed and whether those components containing moving parts operate correctly. The objective is to check whether: — all components have been installed and are in good condition; and — the system has been installed correctly and in accordance with the design specification and relevant standards and regulations; and — the system is free from loose objects and reasonably clean; and — the system does not exhibit abnormal noise; and — the system is safe to operate and maintain; and — there is adequate access to and space around the ventilation system for the purposes of operation and maintenance; and — all controls are readily accessible.BS EN 14134 pdf download.