Ventilation Characteristics of Different Window Designs

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Window Type	Airflow	Ventilation control	Weather protection	Night ventilation	Comments
AA®3110 Horizontal Sliding Window AA®3110HW Horizontal Sliding Window	Good	Medium	Very good	Medium	No obstruction of internal blinds or external paths – can be draughty
AA®603TE Tilturn Window	Good	Good	Good	Medium	Control is complex, can reflect noise into the room and turn function can be difficult with blinds – good at providing draught free winter ventilation	(Internal view)
AA®602TE Pivot Window	Very good	Medium	Good	Good	Can obstruct blinds and prevent glare control for VDU use and reflect noise into the room
AA®603TE Tilturn Window (Bottom hung open in)	Medium	Good	Good	Very good	May obstruct blinds. Can provide good control of external noise from ground level
AA®601TE Casement Window GT70 Slimline Renovation Window (Top hung outward opening)	Good - but less so if restricted opening	Medium	Very good	Good	Can reflect noise from below into the room. Can pose a hazard if opening over a pathway or communal/public area
AA®601TE Casement Window GT70 Slimline Renovation Window (Side hung casement)	Good	Medium	Medium	Poor	Poor security when open and rain can enter. Can pose a hazard if opening over a path or communal/public area
AA®3610 Vertical Sliding Window AA®3610LS Vertical Sliding Window	Very good	Good	Very good	Medium	No obstruction of internal blinds or external paths

Adopted from Building Bulletin 101 Ventilation of School Buildings Version 1.4 2006
For a more indepth guide go to www.teachernet.gov.uk/iaq