Warmer A Series 40 window will reduce heat loss by up to 50% using standard glass and up to 65% with a thermally efficient glass (low-E).  Further improvements are possible using sealed glass units that create triple glazing. Perimeter mastic seals will almost eliminate drafts and ensure much greater comfort near the window.  The effectiveness of the insulation is measured by U-values, the lower the figure the better the insulation.

INSULATION (U-VALUE) CALCULATED IN COMBINATION WITH A PRIMARY WINDOW AT BRFC SAMPLE SIZE OF 1430 x 1230MM

GLASS	METAL PRIMARY WINDOW	TIMBER PRIMARY WINDOW
6 - 12mm	2.84 W/m2K	2.57 W/m2K
6 - 12mm low-E	1.91 W/m2K	1.78 W/m2K
24mm gas filled low-E sealed units	1.52 W/m2K	1.44 W/m2K
24mm enhanced thermal sealed units	1.21 W/m2K	1.15 W/m2K

Quieter A Series 40 window set 100mm apart from the existing window will reduce noise levels by 45dB (decibels) with higher figures achieved using thicker glass.  In most circumstances this will achieve World Health Organisation guidelines for quiet living and working environments.

NOISE INSULATION MEASURED IN COMBINATION WITH A PRIMARY WINDOW

GLASS	50MM CAVITY	100MM CAVITY	200MM CAVITY
6 - 6.4mm	41 dB (Rw)	45 dB (Rw)	47 dB (Rw)
6.8 - 7.5mm	42 dB (Rw)	46 dB (Rw)	48 dB (Rw)
8 - 10mm	43 dB (Rw)	47 dB (Rw)	49 dB (Rw)
10.8 - 12mm	44 dB (Rw)	48 dB (Rw)	50 dB (Rw)

 Safer The Series 40 system is available with a fire option offering 30 minute integrity.  For security it is untested but as a fixed pane and glazed with 6.8mm laminated glass it will provide some resistance to an intruder and, based on comparisons with other fixed systems, is likely to offer blast protection to the same level as anti shatter film in conjunction with bomb blast net curtains.  SECURITY PERFORMANCE (MAXIMUM ACHIEVABLE, CONTACT SELECTAGLAZE FOR SPECIFICATION REQUIREMENTS)

	TEST STANDARD
INTRUDER	N/A
BLAST	N/A
BALLISTIC	N/A
FIRE	BS EN1364-1, BS EN1363-1 - 30 minute fire integrity