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ASSE Standard #1084-2018


Expected release date is 31st Jan 2019

Product Description


Performance Requirements for Water Heaters with Temperature Limiting Capacity

ASSE 1084 supplements the current ASSE 1070 / ASME A112.1070 / CSA B125.70 requirements for temperature limiting devices. The technology of heater controls has come a long way over the past several years regarding precise modulation of heat output that directly resembles, improves, or outperforms other devices due to transient temperature drops. A downstream mixing valve would no longer be necessary and would benefit plumbing systems by reducing pressure drops & reducing maintenance.

Water heaters with precise output temperature control under varying flow conditions are used to provide tempered water to the user. As such, they need to limit the maximum temperature of the water in order to minimize the risk of scalding.

Water heaters covered by this standard have a cold water inlet connection, a means of heating the water, a means of controlling the water temperature, a means of limiting the temperature to a maximum of 120 °F (48.9 °C), and have an outlet connection to connect to downstream fixture fittings.

These water heaters are intended to supply tempered water at point of use in order to reduce and control the risks of scalding. These water heaters are not intended to limit thermal shock.


View the Public Review Copy at http://www.asse-plumbing.org/pr/1084-2018-PR.pdf.

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