Domus Ventilation HRXE-OPH Manual de instrucciones de instalación - Página 4
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2.10 ADF 2010 Ventilation Calculations Design of MVHR Systems
The MVHR system has been sized for the winter period. Additional
ventilation may be required during the warmer months and it has
been assumed that the provisions for purge ventilation (e.g. openable
windows) could be used.
Step 1:
For any design air permeability, determine the whole dwelling
ventilation supply rate from Table 2.
As an alternative where the design air permeability is intended to be
more than (>) 5m
/(h.m
) 50 Pa, allow for infiltration for all dwelling
3
2
types by subtracting from the whole dwelling ventilation supply rate
from Table 2; 0.04 x gross internal volume of the dwelling heated space
(m3).
Step 2:
Calculate the whole dwelling extract ventilation rate by
summing the individual room rates for 'minimum high rate' from
Table 1 (For sanitary accommodation only, as an alternative, the purge
ventilation provisions given in ADF 2010 can be used where security is
not an issue. In this case 'minimum high extract rate' for the sanitary
accommodation should be omitted from the step 2 calculation).
Step 3:
The required airflow rates are as follows:
• The maximum whole dwelling extract ventilation rate (e.g. boost)
should be at least the greater of step 1 and step 2. Note that the
maximum individual room extract rate should be at least those given in
table 1.
3.0 DIMENSIONS (MM)
11
LAB1355R | SEPTEMBER 2018
View from front
607
View from top
Spigots
4 x 125mm dia.
• The minimum air supply rate should be at least the whole building
ventilation rate found in step 1.
For Scotland refer to BRE Digest 398.
For further information refer to "Domestic Ventilation
Compliance Guide" www.planningportal.gov.uk/
buildingregulations/approved documents/partl/compliance
2.11 Pre Commissioning HRXE MVHR Units
Domus Ventilation MVHR units are designed to ventilate the whole
dwelling and must not be used during site construction or the clean-
up period. Cement and plaster dust can be abrasive and can affect fan
performance and reliability. Please ensure that the filters are checked
prior to commissioning to ensure there is no build-up of dust or debris.
While the property is drying out, very high moisture levels are likely
to occur. Therefore it is advisable that if the installation and building
works are complete the unit is left running. If the building works are not
complete please close the air valves or cover up the air valves to prevent
condensation forming in the ductwork and the unit due to natural
migration of warm air.
Side view
Mounting
bracket
416
Unit Dimensions
356
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