The new online tool will help MCS-certified low-carbon heating installers complete a BS EN 12831-1: 2017 compliant heat load calculation, as required in the Heat Pump Design Standard (MIS 3005-D) and The Biomass Installation Standard (MIS 3004).

Installers can calculate room-by-room heat load calculations for a property, which is crucial for ensuring a heat pump or biomass system is sized correctly and meets the requirements of MCS Standards.

Equipped with guidance prompts, pop-ups, and real-time support, the new online tool will streamline the process for installers. This will help to reduce errors and improve efficiency, giving installers more time to focus on delivering high-quality, low-carbon heating installations for their customers.

Once calculations are complete, the tool generates a comprehensive report that can be saved directly on the platform or downloaded for quotations, audits and compliance checks.

Every MCS-certified low-carbon heating installer will have an account and can share calculations seamlessly across their business.

Access to the Heat Load Calculator is exclusive to MCS-certified installers and, starting in January, those who are gaining certification.

The existing Excel-based tool remains available on the MCS website but will no longer be supported or updated.

MCS-certified installers can register for the Heat Load Calculator, and those obtaining MCS certification can request access starting in January.