Block Load

Block Load 4.2 by Carrier is a dedicated HVAC design application engineered to deliver precise whole-building cooling and heating load calculations for commercial facilities ranging from small retail units to large multi-zone complexes. Classified within the engineering and CAD sub-category of business software, the package implements the ASHRAE-endorsed block load method, aggregating simultaneous peak thermal gains across all spaces to size central plant equipment, distribution ductwork and terminal units with minimal over-sizing. Engineers use the program during schematic and design-development phases to produce code-compliant load reports, validate energy-model inputs, compare retrofit scenarios, and generate equipment schedules that feed directly into Carrier’s HAP energy-analysis suite or third-party BIM workflows. The single-version release stream—currently at 4.2—maintains backward compatibility with legacy project files while integrating updated construction and weather libraries that reflect current insulation standards and IECC climate zones. Typical use cases cover new construction bidding, tenant improvement audits, chiller and boiler replacement studies, and LEED baseline models where accurate load data drives utility-incentive calculations. Block Load accepts CAD floor-plan imports, supports unlimited zoning, and outputs detailed psychrometric summaries, enabling mechanical consultants to present auditors, owners and code officials with transparent calculation packages. The software is available for free on get.nero.com, with downloads provided via trusted Windows package sources (e.g. winget), always delivering the latest version, and supporting batch installation of multiple applications.

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