certification:certification_of_buildings_in_which_the_ground_floor_is_used_for_commercial_purposes
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certification:certification_of_buildings_in_which_the_ground_floor_is_used_for_commercial_purposes [2022/06/07 10:08] – corinna.geiger@passiv.de | certification:certification_of_buildings_in_which_the_ground_floor_is_used_for_commercial_purposes [2023/04/25 09:19] (current) – zbastian | ||
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- | ====== Certification of buildings in which the ground floor is used for commercial purposes (revised 5-Sep-2016) ====== | + | ====== Certification of buildings in which the ground floor is used for commercial purposes (for PHPP 9, revised 5-Sep-2016) ====== |
- | **With version 10 of the building criteria, these supplementary provisions were integrated into the Building Criteria document: | + | **The below provisions are an older version which is applicable for projects still using PHPP 9 and criteria version 9. With version 10 of the [[https:// |
---- | ---- | ||
- | For the Passive House Institute' | + | |
+ | For the Passive House Institute' | ||
A very common type of building is that with standard, homogeneous utilisation of the upper floors (usually residential or office use), while the commercial areas on the ground floor may be utilised in widely differing ways depending on the buyer/ | A very common type of building is that with standard, homogeneous utilisation of the upper floors (usually residential or office use), while the commercial areas on the ground floor may be utilised in widely differing ways depending on the buyer/ | ||
- | // | + | // |
- | **Different certification options for buildings with ground floors which are used for commercial purposes. For all variants it is assumed that the upper floors are of Passive House/ | + | |
- | {{: | + | {{: |
**Case 3: ground floor with Passive House envelope but without ventilation system** | **Case 3: ground floor with Passive House envelope but without ventilation system** | ||
- | a) The certification will officially only apply for the upper floors (without the ground floor). This will be stated on the certificate. | + | a) The certification will officially only apply for the upper floors (without the ground floor). This will be stated on the certificate. |
- | b) The upper floors on their own must comply with the Passive House criteria (verification with the PHPP). The ceiling between the ground floor and the first floor forms the lower system boundary and is assumed as adiabatic. In the stairwell area etc. the boundary can also be at the ceiling level even if an air space exists here in part (the system boundary does not have to continue down to the ground in the stairwell area). | + | b) The upper floors on their own must comply with the Passive House criteria (verification with the PHPP). The ceiling between the ground floor and the first floor forms the lower system boundary and is assumed as adiabatic. In the stairwell area etc. the boundary can also be at the ceiling level even if an air space exists here in part (the system boundary does not have to continue down to the ground in the stairwell area). |
- | c) In addition, a separate PHPP calculation will be prepared for the ground floor, with general values for internal heat gains (3.5 W/m²), air change rate (0.4- fold) and heat recovery efficiency (same as average value of the upper floors). The area-weighted average of the heating and cooling demands for the ground floor and upper floors must also comply with the Passive House criteria. | + | c) In addition, a separate PHPP calculation will be prepared for the ground floor, with general values for internal heat gains (3.5 W/m²), air change rate (0.4- fold) and heat recovery efficiency (same as average value of the upper floors). The area-weighted average of the heating and cooling demands for the ground floor and upper floors must also comply with the Passive House criteria. |
- | d) The requirements for airtightness of the building apply for the entire building envelope including the ground floor. | + | d) The requirements for airtightness of the building apply for the entire building envelope including the ground floor. |
- | e) The heating system on the first floor must be dimensioned adequately in order to ensure comfortable temperatures also in the case of an uninhabited and unheated ground floor. If low temperatures prevailing for long periods of time on the ground floor cannot be ruled out (vacant/use as a workshop etc.), then the ceiling between the ground floor and the first floor should be so well-insulated that there won't be any impairment of thermal comfort and structural integrity, and heating costs should not greatly exceed those for the other floors. Alternatively, | + | e) The heating system on the first floor must be dimensioned adequately in order to ensure comfortable temperatures also in the case of an uninhabited and unheated ground floor. If low temperatures prevailing for long periods of time on the ground floor cannot be ruled out (vacant/use as a workshop etc.), then the ceiling between the ground floor and the first floor should be so well-insulated that there won't be any impairment of thermal comfort and structural integrity, and heating costs should not greatly exceed those for the other floors. Alternatively, |
- | f) The prospective buyer/ | + | f) The prospective buyer/ |
**Case 4 (a+b): ground floor with simple thermal protection standard because later user requirements are unknown or due to non-negotiable requirements of a known user** | **Case 4 (a+b): ground floor with simple thermal protection standard because later user requirements are unknown or due to non-negotiable requirements of a known user** | ||
- | a) The certification will only apply for the upper floors (without the ground floor). This will be stated on the certificate. | + | a) The certification will only apply for the upper floors (without the ground floor). This will be stated on the certificate. |
+ | |||
+ | b) The upper floors on their own must comply with the Passive House criteria (verification with the PHPP). There must be a clearly defined boundary between both zones, which simultaneously represents the airtight layer. With regard to heat losses, the ceiling and walls towards the ground floor zone may be assumed as adiabatic in the PHPP. | ||
- | b) The upper floors | + | c) The requirements for airtightness of the building apply for the upper floors (without |
- | c) The requirements | + | d) A (draft) plan will be prepared |
- | d) A (draft) plan will be prepared for the ground floor with which the Passive House Standard can be achieved | + | e) The heating system on the first floor must be dimensioned adequately in order to ensure comfortable temperatures also in the case of an uninhabited and unheated |
- | e) The heating system on the first floor must be dimensioned adequately in order to ensure comfortable temperatures also in the case of an uninhabited and unheated ground floor. If low temperatures prevailing for long periods of time on the ground floor cannot be ruled out (vacant/use as a workshop etc.), then the ceiling between the ground floor and the first floor should be so well-insulated that there won't be any impairment of thermal comfort and structural integrity, and heating costs should not greatly exceed those for the other floors. Alternatively, it can be ensured that the ground floor will always be kept at a certain minimum temperature in case of vacancy. | + | f) Prospective buyers/ |
- | f) Prospective buyers/ | ||
certification/certification_of_buildings_in_which_the_ground_floor_is_used_for_commercial_purposes.txt · Last modified: 2023/04/25 09:19 by zbastian