Warmer A Series 41 lift-out will reduce heat loss by up to 50% using standard glass, up to 65% with a thermally efficient glass (low-E).  High performance compression 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	2.85 W/m2K	2.58 W/m2K
6 - 12mm low-E	1.91 W/m2K	1.79 W/m2K
24mm gas filled low-E sealed units	1.73 W/m2K	1.63 W/m2K
24mm enhanced thermal sealed units	1.34 W/m2K	1.27 W/m2K

Quieter

A Series 41 lift-out set 100mm apart from the existing window will reduce noise levels by 45dB (decibels). In most circumstances this will achieve World Health Organisation guidelines for quiet living and working environments and the twin compression seals remain very effective over long periods. 

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 41 lift-out is not designed for security but it is fitted with simple storm catches and, if glazed with laminated glass, will provide limited resistance to forced entry.  

SECURITY PERFORMANCE (MAXIMUM ACHIEVABLE, CONTACT SELECTAGLAZE FOR SPECIFICATION REQUIREMENTS)

	TEST STANDARD
INTRUDER	Non certified second barrier to entry
BLAST	N/A
BALLISTIC	N/A
FIRE	N/A