SAP Section 2

Ventilation

Configure the ventilation according to section 2 of SAP

epctk.ventilation.configure_ventilation(dwelling)[source]

Mechanical ventilation:

  1. Positive input ventilation (PIV) Positive input ventilation is a fan driven ventilation system, which often provides ventilation to the dwelling from the loft space. The SAP calculation procedure for systems which use the loft to pre-heat the ventilation air is the same as for natural ventilation, including 20 m3/h ventilation rate equivalent to two extract fans or passive vents. (The energy used by the fan is taken as counterbalancing the effect of using slightly warmer air from the loft space compared with outside). Some positive input ventilation systems supply the air directly from the outside and the procedure for these systems is the same as for mechanical extract ventilation.

  2. Mechanical extract ventilation (MEV) MEV is a fan driven ventilation system, which only extracts air from the dwelling. The SAP calculation is based on a throughput of 0.5 air changes per hour through the mechanical system, plus infiltration. MEV can be either:

    • centralised: air is extracted from wet rooms via ducting and expelled by means of a central fan., or
    • decentralised: air is extracted by continuously-running fans in each wet room.
Parameters:dwelling –

Returns:

epctk.ventilation.set_mvhr_dwelling_properties(dwelling, mv_ducttype, mv_approved, ventilation_type)[source]

Set the properties for the MVHR unit based on tables 4g and 4h

Parameters:
  • dwelling –
  • mv_ducttype –
  • mv_approved –
  • ventilation_type –
Returns:
epctk.ventilation.ventilation(dwelling)[source]

Ventilation part of the worksheet calculation. This is run after the dwelling has been suitably configured

Parameters:dwelling –

Returns: