| Standard Title | Scope | Action | Year | Purchase |
| Z21.13a-2010/CSA 4.9a-2010: First Addenda to American National Standard/CSA Standard for Gas-Fired Low Pressure Steam And Hot Water Boilers. | Details test and examination criteria for Category I, Category II, Category III and Category IV low-pressure steam and hot water boilers for use with natural, manufactured and mixed gases, liquefied petroleum gases and LP gas-air mixtures. A boiler is defined in the standard as a boiler operating at or below the following pressures or temperatures: steam heating boiler - 15 psi (103.42 kPa) steam pressure; hot water heating or supply boiler - 160 psi (1.10 MPa) water pressure, 250°F (121°C) water temperature. | New Addenda | 2010 | Buy |
| ANSI Z21.74a-2010: First Addenda to American National Standard for Portable Refrigerators for Use with HD-5 Propane Gas. | This standard covers gas fired refrigerators, having refrigerated spaces for storage of foods with input ratings of 1000 Btu/hr (293 W) or less, and which are for use with HD 5 propane gas only. These refrigerators are intended for use both indoors in adequately ventilated structures and outdoors. This standard applies to refrigerators designed for self contained fuel supplies and using fuel cylinders of not more than 75 in3 (1 230 cm3) (21/2 pounds nominal water capacity). Fuel supplies shall be in accordance with the Standard for the Storage and Handling of Liquefied Petroleum Gases, ANSI/NFPA No. 58. | New Addenda | 2010 | Buy |
| Z21.11.2b-2010: Second Addenda to American National Standard for Gas-Fired Room Heaters, Volume II, Unvented Room Heaters. | Details test and examination criteria for unvented heaters for use with natural, manufactured and mixed gases, liquefied petroleum gases, and LP gas-air mixtures. Such heaters are limited to Maximum input ratings of 40,000 Btu per hour. | New Addenda | 2010 | Buy |
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