CSA/ANSI Z21.10.1:19/CSA 4.1:19 PDF Download

Newly manufactured automatic storage water heaters with input ratings of 75,000 Btu per hour or less are covered by the CSA/ANSI Z21.10.1:19/CSA 4.1:19 standard. These water heaters can be utilized with a variety of gases, including liquefied petroleum gases, natural gas, produced gas, mixed gas, LP gas-air mixes, and liquefied petroleum gas installations for recreational vehicles. Additionally, it covers water heaters made for applications requiring both potable water and space heating, such as those that can be placed in manufactured houses and recreational vehicles.

Additionally, the standard contains guidelines for water heaters that use heat pipe heat exchangers, which are tools that speed up heat transfer. It states that certain tests must be performed on direct-vent water heaters, which have their air intake and vent output close together. It is mandatory that water heaters installed in recreational vehicles be of the direct-vent variety. The standard also covers water heaters with draft hoods and automatic vent damper devices, as well as water heaters with automatic flue damper devices that are mechanically or electrically actuated.

The standard also specifies that if a measurement value is provided, the first value should be taken into consideration as the specification. It states that, unless otherwise stated, all psi values in the standard are to be regarded as gauge pressures. Both sections that are exclusive to Canada and the United States are included in it.