...
The Soffit Floor can have Insulation added to it to reduce Heat Transfer into the space however the Assembly cannot be changed.
SUBFLOOR ZONES
...
Roofspace Ventilation Rates
Each Roofspace Zone can have a variety of Ventilation Rates to approximate the openness & wind flow through the Zone.
These are changed within the Ceiling Data-Grid’s Roofspace Ventilation column. If one Ceiling connected to the Roofspace changes the Ventilation rate then all Ceiling Ventilation columns will update accordingly.
Ventilation Rate | Description |
|---|---|
Min Vent | Attic Roofspace with Minimal Roofspace Ventilation (e.g. no dedicated roofspace ventilation system) |
Nat Vent | Naturally Ventilated Attic Roofspace (e.g. Eave Vents & Whirly Ventilator/Ridge Cap Vents) |
Mech Vent | Mechanically Ventilated Attic Roofspace (e.g. Eave Vents & Powered Roof Ventilator) |
| Info |
|---|
Unsarked Tile Roofs NatHERS Protocol & the Chenath Engine also impose a requirement for Unsarked Tile Roofs which are quite rare in new Australian housing that further increases roof-space ventilation rates in the Simulation. Hero detects this situation automatically. A prefix “Unsarked Tile” is added to the Roofspace Zone’s Ventilation Rate column if the Assembly Type is a Tile Roof & there is No Roof Insulation selected. |
...
SUBFLOOR ZONES
A Subfloor Zone is automatically created by Hero whenever a Floorsis of a Suspended Type with a Subfloor Adjacency Type.
This Subfloor Zone is modelled as a separate Zone within Chenath to account for the complex interactions of radiation, ventilation, ground-layer & convection within such a space.
Subfloor Zones can have customisable Subfloor Walls.
Subfloor Walls
An External Subfloor Wall will be automatically created for each External Wall on the normal Zone above.
Subfloor Walls are shown within the Wall Data-Grid typically with a “SF” prefix to their name.
The initial Total Height of a Subfloor Wall will be the Level Height, with a negative Base Height & a Top Height of 0mm to indicate it is lower than the Level relative height. Heights of Subfloor Walls however can adjusted within the Wall Data-Grid.
The Construction, Insulation, Colour can also be changed within the Wall Data-Grid as per normal walls.
...
The Wall Data-Grid showing 4 External Subfloor Walls created automatically for a square single Zone on a Level with Height above Ground of 1m (1000mm).
Subfloor Ventilation Rates
Each Subfloor Zone can have a variety of Ventilation Rates to approximate the openness & wind flow through the Zone.
These are changed within the Floor Data-Grid’s Subfloor Ventilation column. If one Floor connected to the Subfloor changes the Ventilation rate then all Floors Ventilation columns will update accordingly.
Ventilation Rate | Description |
|---|---|
Enclosed (Disc.) | A Completely Enclosed Subfloor with Subfloor Wall Ventilation to Minimum NCC Requirements, and No Air-Cavity through any Wall Cavities above into a Roofspace |
Enclosed (Conn) | A Completely Enclosed Subfloor with Subfloor Wall Ventilation to Minimum NCC Requirements, with an Air-Cavity through any Wall Cavities above into a Roofspace |
Open | Additional Ventilation to Subfloor above NCC Requirements |
Very Open | Very well ventilated / highly open subfloor |