Why Integrated Heating Design is
Becoming Critical for New Homes
As Ireland’s residential construction sector continues to deliver homes to increasingly demanding energy performance standards, heating system design can no longer be treated as a standalone element of a project. Instead, it is becoming an integral part of the overall building design process, influencing everything from compliance and performance to programme certainty and long-term occupant comfort.
The transition to low-energy housing has fundamentally changed how heating systems need to be designed. Modern homes require significantly lower heat loads than traditional properties, meaning that system sizing, heat emitter selection, hydraulic design and controls must all work together to achieve the intended performance. Small design inaccuracies that may once have had little impact can now lead to reduced efficiency, unnecessary costs or additional work during construction.
For developers and contractors, this places greater emphasis on making heating design decisions much earlier in the project lifecycle. Integrating heating system design during the pre-construction stage helps avoid late design revisions, simplifies procurement and provides greater certainty before work begins on site.
This integrated approach is particularly important as air-to-water heat pumps like Grant’s award-winning Aerona R290, become the standard heating solution for new homes. Unlike conventional heating systems, heat pumps achieve their highest efficiencies when the complete system has been correctly designed around the building’s calculated heat demand. Accurate room-by-room heat loss calculations, correctly sized heat emitters and properly balanced hydronic systems are all essential to delivering the performance expected by both homeowners and regulators.The increasing complexity of modern heating design has also driven demand for more detailed technical support. Construction teams are looking for heating specifications that extend beyond equipment selection to include complete system layouts, pipe sizing, hydraulic calculations and installer-ready documentation that can be easily coordinated with other building services.
Grant has responded to this evolving requirement by continuing to invest in its free Heating Design and Specification Service, helping consultants, architects, developers and contractors integrate heating design into projects from the earliest stages. Building on decades of technical expertise, the service now incorporates advanced digital design software to deliver faster, more detailed and highly accurate heating system specifications for new-build homes and residential developments.
Using advanced calculation software, Grant’s technical team produces detailed room-by-room heat loss calculations, emitter sizing, underfloor heating layouts, pipework circuit designs and material schedules. Automated design workflows improve consistency while providing clear schematic drawings that can be reviewed by project teams and integrated into wider construction programmes. The service also supports S.R. 50/MCS heat loss calculations, helping project teams demonstrate compliance with current building regulations and NZEB requirements while reducing the risk of costly late-stage design changes.
At the heart of many of these designs is the Grant Aerona R290 air-to-water heat pump, developed for the Irish climate and available in outputs suitable for a wide range of residential property types. However, Grant recognises that even the highest-performing heat pump can only deliver its full potential when it forms part of a carefully engineered heating system, comprised of main heat source, hot water storage, heat emitters and smart controls.
As the industry continues to focus on delivering higher-performing, future-ready homes, integrated heating design is rapidly becoming a key differentiator. By bringing together digital design capability, technical expertise and practical project support from the earliest design stages, construction teams can reduce project risk, improve installation efficiency and deliver homes that perform as intended long after handover.
To avail of Grant’s free Heating Design and Specification Service, send house plans to heatpump@grant.ie.
Think Heating. Think Grant.
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Michael McDonnell Managing Editor of Irish Construction Industry Magazine & Plan Magazine
