Kuwait Amends Water Heater Energy Standards - G/TBT/N/KWT/724/Corr.1

Overview

Kuwait's Public Authority for Industry (PAI) has issued a corrigendum (G/TBT/N/KWT/724/Corr.1) to its technical standard KWS 1903: 2025, which governs energy performance requirements and labelling for water heaters. This amendment, referenced as KWS 1903: 2025/COR1: 2026, introduces a revised calculation for energy performance, directly impacting manufacturers and exporters of water heaters to the Kuwaiti market.

Key Details

• Country / Notifying Member: Kuwait, the State of
• Document Symbol: G/TBT/N/KWT/724/Corr.1
• Notification Date: 2026-06-02
• Objective: Energy efficiency, consumer protection, and quality standards related to water heater performance and labelling.

What Is Being Regulated

The regulation targets water heaters, specifically amending a technical standard related to their energy performance requirements and labelling. The relevant standards are KWS 1903: 2025 and its corrigendum, KWS 1903: 2025/COR1: 2026.

Key Requirements & Technical Changes

The primary change introduced by Corrigendum 1 is the revision of Equation (C8) used for calculating 𝜃𝑝. This formula is critical for determining water heater energy performance.

Link to the corrigendum and formula: here

The definitions of the variables involved remain consistent, detailing:
- 𝑇𝑠𝑒t in 𝑜𝐶: water temperature, without withdrawal of water, measured after the last cut-out of the thermostat.
- 𝜃𝑐 in 𝑜𝐶: average temperature of inlet cold water during the test.
- 𝜃𝑝′ in 𝑜𝐶: average temperature of outlet water, and its normalized value is named 𝜃𝑝.

This change specifically alters how the normalized outlet water temperature (𝜃𝑝) is calculated.