Designing for Performance: A Digital Workflow for Modern Heat Pump Systems

With the transition to low-carbon heating technologies, accurate system design has never been more important. For building services engineers and design teams, the successful integration of heat pump systems depends not only on product performance but also on careful planning, accurate heat-loss calculations and clear technical documentation at the design stage.

Recognising the growing demand for detailed technical support, Grant, long established as a leader in Ireland’s home heating sector, has strengthened its support for engineering professionals and the wider industry. By enhancing its Heating Design & Specification Service through the introduction of advanced digital design software, the company can now provide comprehensive heating system designs that can be integrated earlier in the design process.

Using the enhanced digital platform, Grant’s technical specialists carry out in-depth room-by-room heat-loss calculations, detailed sizing for radiators or underfloor heating systems and full pipework circuit layouts. Automated calculation processes improve accuracy and consistency whilst reducing the time required to produce complete system specifications.

For building services engineers coordinating multiple systems across complex projects, the availability of clear and structured design outputs can significantly improve collaboration between design teams and contractors. The digital workflow produces clear layout drawings and annotated schematics provide design teams with a complete heating system specification that can be reviewed and integrated early in the project workflow.

Notably, the enhanced design service also supports regulatory compliance. Heat-loss calculations are produced in line with recognised industry standards, including S.R. 50 and MCS requirements, helping project teams demonstrate alignment with relevant Building Regulations and additional energy performance targets.

The approach also supports the effective specification of modern heat pump technologies such as the Grant Aerona R290 air-to-water heat pump, which can achieve A+++ ErP ratings and SCOPs of up to 4.88. Whilst the Aerona R290 heat pump is capable of 75°C flow temperature, correct system design will ensure that lower, more efficient flow temperatures can be utilised.

For engineers designing systems across a range of property types, the Aerona R290 range offers flexibility with five models ranging from 4kW to 16kW outputs.

By combining digital efficiency with decades of technical expertise, Grant’s free Heating Design & Specification Service continues to provide practical, real-world support to the Irish construction industry, helping engineers deliver compliant, future-ready homes.

Planning drawings can be sent to heatpump@grant.ie or engineers can complete the Design & Specification Application Form online, attaching property plans, contact details, and preferred heat emitters (radiators, underfloor, or both).

Learn more about the Grant Aerona R290 heat pump and Grant’s innovative product range at grant.ie. Follow Grant on LinkedIn @GrantEngineeringULC, Facebook @GrantIRL, Instagram @grant_irl or

YouTube @GrantEngineeringIE.