Tick the EPC box if you want the studio to generate a reference building and carry out the calculations needed to produce a certificate that can be lodged by a qualified Energy Assessor. How much the occupancy changes throughout the day will determine if the reference building will pre-heat the fresh air before it enters the zone.
When you tick the accredited constructions box the BRUKL document will state that measured constructions have been used. This option will not change your results in any way.
The tick box for light metering means that the lighting consumption will be adjusted by 5%, and therefore the CO2 emissions will also be reduced. This is as per Table 1 of the ADL2A (2013) document. Likewise, on the air-side configuration screen there is an option for monitoring and targeting with alarms for out-of-range values which adjusts consumption for heating, cooling, auxiliary, and HWS by 5%.
The power factor correction options are <0.9, 0.9-0.95, and >0.95. If you select 0.9-0.95 or >0.95 then anything that uses grid supplied electricity as a power source will have its CO2 emissions adjusted by 1% or 2.5% respectively (also taken from Table 1 of ADL2A 2013).
If you're modelling power factor correction and you've ticked the light metering box as well, then the lighting consumption value will be adjusted by 5% first of all, this is to account for the light metering in the building. The adjusted value will then be multiplied by the relevant CO2 emission factor. Finally the 1% or 2.5% power factor adjustments will be made.
The notional building has a power factor correction >0.95 and checks for out-of-range values for lighting (and HVAC). It will use the same adjustment factors from Table 1 of ADL2A.
To model a modular and portable building you will need to tick the checkbox for the same. You will then need to inform the software using a drop-down list that will appear whether the planned service life will be less than 2 years or more. You will also need to select a date of manufacture. With this information the studio will multiply the resulting TER (target emissions rate) by a factor as per Table 2 of the ADL2A (2013) guide.
The reference building type determines the percentage of opening areas used in the reference building as per Table 24 of the NCM modelling guide (2013), and will affect the Asset Rating reported on the EPC. It will have no affect on the Part L2 analysis.
Exercise and Notes
Tick both the Part L2 and EPC boxes. Later you will need to enter either your Assessor Number or a dummy value of ABCD123456. Ticking the EPC box means the studio will also produce a reference building alongside the actual and notional buildings. If you enter a dummy value then you will not be able to lodge the certificate.
Set the power factor correction to >0.95 in order to set the adjustment factor for CO2 emissions to 2.5%.
Tick the light metering box so that the lighting consumption will be adjusted by 5% (before the power factor correction is taken into account).
The reference building type will be set to places of assembly, office, and shops, which means the percentage opening areas in the reference building will be 40% windows (of exposed wall area) and 20% roof-lights (of exposed roof area).