Project Overview

A high-performance, energy-efficient plant was delivered for mixed office and workshop spaces, retrofitting the gas plant room to a fully renewable heat-pump system.

Scope of Works

• Design, supply and commissioning of 4 × MasterTherm BA60i inverter heat pumps for space heating
• 1 × MasterTherm AQ60ZHX high-temperature heat pump dedicated to DHW and selected fan-coil circuits
• Applications: trench heating in office/admin zones; DHW for workshop; fan-coil heating in high-occupancy/process areas

System Description

Four BA60i units operate in parallel to provide a resilient, responsive LTHW supply (≈140 kW class) to the trench heating network, offering unobtrusive, efficient heating in open-plan and corridor spaces.

The AQ60ZHX reliably delivers DHW up to ~70 °C for hygiene/process needs and feeds zoned fan-coil circuits where rapid or intermittent heat is required.

Advanced PLC logic enables smart scheduling, temperature optimisation, real-time fault detection and secure remote access.

Project Results & Benefits

• Granular zone control—heat delivered precisely where and when needed
• Integrated DHW and space heating with zero on-site combustion
• Minimal operator input thanks to intelligent automation and remote support
• Quiet, efficient operation and strong alignment with DLRCC carbon-reduction targets

Technical Highlights

• Trench heating designed around low LTHW temperatures (typ. 45/35 °C) for high seasonal efficiency.
• Cascade control with lead/lag rotation and wide turndown maintains performance at shoulder seasons.
• Fan‑coil circuits operate with variable‑flow pumping and DP control to match intermittent loads.
• DHW cylinder pasteurisation scheduling and priority logic ensure hygiene without compromising heating capacity.

Energy & Carbon (SEAI)

Removal of on‑site combustion and adoption of high‑efficiency heat pumps materially cut CO₂ emissions versus the previous gas plant; benefits increase as grid intensity declines.

• Project approach aligns with SEAI guidance and local‑authority decarbonisation plans.
• Data capture supports SEAI reporting and continuous improvement programmes.