Appendix B: Automatic Triggers for Prescriptive Measures

The following logic is applied within the VE to determine when a prescriptive measure applies, and if so, what modifications are made for that measure.

Measure	Trigger	Action
Central Time Heating Control	An Apache System is in-use but does not have all of the following Heating System Controls (see System Controls [1] tab): - Central Time Control - Local Time Control - Optimum Start-Stop Control	Turn on Central Time Control for the Apache System in the System Controls tab, and also increase its generator seasonal efficiency by 1% in the Heating System [2] tab (this will also adjust the Seasonal efficiency value on the Heating [3] tab)
Lighting Controls	A room is included for analysis but: - does not have Local Manual Switching (even though the room’s activity type would support it), and/or - does not use Photoelectric Switching when the room has external windows and/or rooflights	If the NCM activity type supports it, set Local Manual Switching to be ticked for the room. If the room has external windows and/or rooflights, set Photoelectric Options to be ticked, Control Type to be Switching, Parasitic Power to be non-default, 0.3 W/m²
Draught-stripping Windows & Doors	Infiltration Rate of Actual Building for in-use room types exceeds the equivalent Infiltration Rate if Building Air Permeability was 14 m³/(h · m²).	Tick the Override default values option for Infiltration Rates and reduce the rates for in-use room types by 10% [4] .
Hot Water Storage Insulation	An Apache System is in-use and marked as a DHW storage system specified by insulation type with but the type is set to Uninsulated.	Set Insulation Type of the storage system for the Apache System to be Loose jacket and Thickness to be 80mm (see Hot Water [5] tab).
Lamp Replacement	A room uses an internal gain of type Fluorescent Lighting with Input Mode set to Inference, and Lamp Type set to Tungsten/Halogen.	Set Lamp Type of the Fluorescent Lighting internal gain to be Fluorescent – Compact.
Boiler Replacement	An Apache System is in-use with Heat Source as LTHW Boiler, MTHW Boiler or HTHW Boiler, but is marked as being more than 15 years old (see Heating System tab).	Set the generator seasonal efficiency for the Apache System appropriate for its selected Energy Source: - Natural Gas: 0.86 - LPG: 0.87 - Biogas: 0.75 - Oil: 0.84 - Coal/Anthracite/Smokeless: 0.75 - Dual-Fuel Appliances: 0.75 - Biomass: 0.75 - Waste Heat: 0.75
Roof Insulation	A room of type Unheated Roof is included for analysis and has loft access, and the roof construction it is assigned has a U-value > 1.0 W/m² ^·K	Create and assign a new copy of each roof construction, adjusting the U-value to 0.15 W/m² ^·K by addition/modification of an insulation layer.