PSQCA has developed Pakistan standard for “Seasonal Performance Factor of Air Conditioner” PS ISO 16358. PS ISO 16358 PART: 1 COOLING SEASONAL PERFORMANCE FACTOR PS ISO 16358 PART: 1 COOLING SEASONAL PERFORMANCE FACTOR (Amendment 1) PS ISO 16358 PART: 2 HEATING SEASONAL PERFORMANCE FACTOR PS ISO 16358 PART: 3 ANNUAL PERFORMANCE FACTOR