Reducing Building Emissions with Hybrid Rooftop Systems

In 2025, GWLRA took practical steps to reduce building emissions while keeping a clear focus on reliability, comfort, and value for clients and tenants. Across industrial and retail properties nationwide, we began shifting away from conventional natural gas rooftop units toward hybrid and electric alternatives – showing that meaningful decarbonization can happen without disrupting day‑to‑day operations.

Rooftop heating systems can be a major contributor of direct greenhouse gas emissions in industrial and retail buildings. Replacing them presents an opportunity to lower emissions, provided that performance and costs remain predictable. To strike that balance, GWLRA introduced hybrid systems that rely primarily on high‑efficiency electric heat pumps, with natural gas available during the coldest days, as well as fully electric units where conditions allow. This flexible approach supports emissions reductions while meeting the demands of Canada’s varied climates.

The program has been tailored region by region. In British Columbia, more than 40 hybrid units were replaced in 2025, with additional upgrades planned as equipment reaches end of life. In the Greater Toronto Area, pilot projects are testing performance and maintenance impacts, with expansion planned in 2026. In Quebec, where electricity is both lower emission and more cost effective, GWLRA prioritized full electrification.

Early results are encouraging. Depending on the building, emissions reductions of 10% to 50% are already being achieved, with no significant impact on tenant operations. Incentives have also played a key role, with $300,000 secured to date – covering close to 30% of total capital costs. By combining thoughtful investment, careful testing and available incentives, GWLRA is scaling solutions that balance environmental factors and long‑term building performance.