Overview of bedroom and apartment survey
| Data category | Data description |
| General | Surveyors’ names Participant ID |
| Apartment description | Type: Single level, duplex, studio-apartment Number of rooms Type of each room: bedroom, living room, bathroom, etc Heating system type Sources of internal heat, for example, HIU,* hot water tanks† Natural ventilation: single sided, cross-vented‡ Mechanical ventilation: extract only, supply and extract,§ MVHR¶ |
| Bedroom description | Floor plan, dimensions, bed location, heat emitter** locations, ceiling height Volume and location of large wardrobes, cupboards, etc Natural ventilation: single sided, cross-vented‡ Mechanical ventilation inlets and outlets Presence of fans, dehumidifies, portable air-conditioning |
| Bedroom windows | Orientation of each window (degrees from north) Number of windows and the dimensions of each Dimensions and type of each glass area (single, double, etc) Number of opening windows, type of opening and opening area |
| Bedroom shading | Presence and dimensions of external shading: overhangs, side-fins Internal shading for example, curtains (thick or thin), roller blinds, louvre blinds, etc |
| Photographs | External elevation of building showing apartment location Views from bedroom window(s) Window and curtain details Hot water tanks and other internal heat sources Fans, dehumidifier, air-conditioning if present Mechanical ventilation inlets and outlets |
*HIU transfers heat from the building-wide heat loop into the apartment.
†Hot water tanks commonly store hot water for washing and may also be used in conjunction with the HIU as part of the space heating system.
‡Bedrooms and apartments that have single sided ventilation have windows and other openings facing in only one direction. Cross-ventilated apartments and bedrooms have openings on opposite sides of the building/bedroom. Cross-ventilation provides more effective natural night-time cooling of indoor spaces.
§Mechanical ventilation may be by extracting air (typically from kitchen and bathroom areas) or by extracting air and supplying fresh air to living spaces.
¶MVHR units balance extract and supply air and transfer heat from the exhaust air to the supply air in winter.
**Either an electric heater or a radiator in a water-based system.
HIU, heat interface unit; MVHR, mechanical ventilation heat recovery.