CSA 4.3-2014 pdf download
This Standard applies to newly produced, large automatic storage water heaters having input ratings above 75,000 Btu/hr (21 980 W), instantaneous water heaters, circulating water heaters including booster water heaters (see Clause 3, Definitions), hereinafter referred to as water heaters or appliances,constructed entirely of new, unused parts and materials: a) for use with natural gas; […]
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