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The Guernsey Energy Centre, Admiral
Park, Le Bouet, Guernsey GY1 2BB

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Calorific value	716 Btu/ft³ (26.67MJm³)
Specific gravity	1.15 - 1.22
Wobbe No	648 - 668 (24.46MJm³)
Flame Speed (Weaver)	16
Air required for combustion	6.36 per unit volume of gas
Normal operating pressure at appliance	2" - 4" wv (5-10 mbar)