Energy

Asia Cement uses 2019 as the base year for its energy management targets and aims to reduce both total energy consumption and energy intensity by 1% annually. In 2025, total energy consumption was 12,490 TJ (equivalent to 3,469,406 MWh), while energy intensity was 4.7% below the base-year level. The Company continues to improve energy efficiency and advance its low-carbon transition.

Waste heat power generation

At Asia Cement’s Hualien Plant, waste heat from the rotary kiln system is recovered to generate high-pressure steam for power generation. In 2025, net power generation from waste heat recovery was 66,675 thousand kWh, approximately enough to supply 16,000 households. The plant purchased 297,663 thousand kWh of electricity; net waste-heat power generation was equivalent to 22% of purchased electricity.

Energy Demand Management Plan

Asia Cement implements an energy demand management plan at its manufacturing sites by participating in Taiwan Power Company’s (Taipower) demand bidding program. When Taipower anticipates a potential electricity supply shortfall during peak demand, it activates the program. Participating companies reduce electricity use during peak hours in exchange for electricity charge credits. This form of load-shifting management also helps balance the power grid.

From 2016 to 2024, Asia Cement cumulatively reduced electricity use by 12.26 million kWh and received NT$127.3 million in electricity charge credits. Beginning in 2025, the Company also participated in Taipower’s planned demand response program, reducing electricity use from 4:00 p.m. to 10:00 p.m. on working days from May through October. In 2025, it reduced electricity use by 20.58 million kWh and received NT$40.14 million in electricity charge credits.

Use of Clean Energy: Renewable energy generation or transfer

Asia Cement and its subsidiaries continue to develop solar power facilities. By the fourth quarter of 2023, self-generated and self-consumed solar systems with a total installed capacity of more than 3.7 MWp had been completed. In 2025, renewable energy generation, including self-use and wheeling, totaled 4,730 thousand kWh, exceeding the annual target of 4,500 thousand kWh.