Applies to the design, materials, construction, thermal insulation and performance of thermostatically controlled heaters of 6.5 to 450 L capacity designed for pressures up to 120 kPa (12 mH2O), installed in a vertical position either open-vented to NZS 4603 or valve-vented to NZS 4607.
Date published: 31/05/1988
Download the New Zealand standard NZS 4602:1988 [PDF, 1.6 MB]
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