WTO notification · TBT
MexicoProposed measure, not in force yet
Draft Official Mexican Standard PROY-NOM-039-ENER/SE-2025, Thermal performance, gas savings and safety of low-pressure solar water heaters and low-pressure solar water heaters with backup from a water heater that uses L.P. gas or natural gas as fuel. Specifications, test methods and labeling.
Proyecto de Norma Oficial Mexicana PROY-NOM-039-ENER/SE-2025, Rendimiento térmico, ahorro de gas y seguridad de los calentadores de agua solares de baja presión y de los calentadores de agua solares de baja presión con respaldo de un calentador de agua que utiliza como combustible gas L.P. o gas natural. Especificaciones, métodos de prueba y etiquetado.
Mexico notified this proposed TBT measure to the WTO on 26 June 2026. The comment period closed on 25 August 2026.
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Source: WTO ePing (opens in a new tab). Summaries by Expodite, which is independent of the WTO.
Published here:
Applicable to low-pressure solar gas water heaters with or without backup from a water heater that uses L.P. gas, natural gas or electrical energy as an energy source, operating at working pressures lower than 3.0 kgf/cm2, for domestic or commercial use, thermosiphon and self-contained type
Aplicable a los calentadores de gas solares de baja presión con o sin respaldo de un calentador de agua que utiliza como fuente de energía gas L.P., gas natural o energía eléctrica, que operen a presiones de trabajo menores que 3.0 kgf/cm2, para uso doméstico o comercial, tipo termosifón y auto cont
The comment period closed on 25 August 2026. You can still raise concerns about the measure with your country's WTO TBT enquiry point, quoting the document symbol G/TBT/N/MEX/575; it can take them up with Mexico.
Find your country's enquiry point on WTO ePing (opens in a new tab)The notified draft Standard establishes minimum values for thermal performance, gas savings, test methods, labelling, and safety specifications.
Expodite writes its summary from the official record. The notification and the documents it notifies are on the WTO's own websites.
WTO notificationSPSProposed measure, open for commentsNew
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Symbol: G/SPS/N/MEX/479Comments until 8 January 2027
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Mexico notified this proposed TBT measure to the WTO on 4 November 2026. Comments are open until 3 January 2027.
Symbol: G/TBT/N/MEX/589Comments until 3 January 2027
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Symbol: G/TBT/N/MEX/588
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Mexico notified this proposed SPS measure to the WTO on 22 October 2026. Comments are open until 21 December 2026.
Symbol: G/SPS/N/MEX/478Comments until 21 December 2026
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