Heat Pump Installation Timeline and Disruption (2026)
Heat pump installation timeline in Ireland, including survey, system design, SEAI grant approval, preparation work, on-site installation, commissioning and household disruption.
Typical on-site installation: 2–4 days | Full process: 3–6 weeks
From Survey to Commissioning
The physical installation of an air-to-water heat pump usually takes only a few days, but the full process starts earlier with a technical survey and system design.
The typical sequence is survey → heat-loss calculation → quotation → grant approval → preparation → installation → commissioning → post-works documentation.
The source page gives a typical full project period of 3–6 weeks.
Survey & Design Stage
Technical survey: typically 1–2 hours
System design and quotation: 1–2 weeks
SEAI grant approval: typically 1–3 weeks
The survey checks insulation, radiator sizing, electrical capacity and outdoor-unit location.
Preparation & Installation
Preparation Work
Radiator replacement, cylinder upgrades, electrical-board work and pipe changes may be required.
Typical preparation duration: 1–3 days depending on scope.
On-Site Installation
Small house: 2–3 days
Semi-detached: 2–4 days
Detached: 3–5 days
Typical Project Timeline
| Stage | Typical Duration |
|---|---|
| Initial consultation | 1 week |
| Survey & heat-loss calculation | 1 week |
| Grant approval | 1–3 weeks |
| Installation works | 2–4 days |
| Commissioning & documentation | 1 week |
Total project duration: typically 3–6 weeks.
Household Disruption
Most disruption happens while the existing boiler system is removed and new pipework, cylinder and electrical connections are installed.
Typical disruption includes temporary loss of heating and hot water, drilling noise and access to utility or plant areas.
The source page gives a typical disruption period of 1–3 days.
Installation & Commissioning Detail
| Task | Typical Duration / Note |
|---|---|
| Outdoor unit installation | 4–6 hours |
| System commissioning | 2–4 hours |
| Heating-system integration | Completed during main install |
| Post-works BER | Required for SEAI grant documentation |
Commissioning includes pressure testing, electrical safety testing, flow-temperature calibration and control setup.
Planning the Programme
Before Installation
Do not schedule the physical installation before required SEAI grant approval.
Complete radiator, cylinder or electrical preparation first where practical.
During Installation
Allow for 1–3 days of heating/hot-water disruption.
Ensure access to the plant area and outdoor-unit route.
After Installation
Commissioning certificate, electrical completion certificate, warranty and post-works BER documentation are required.
These documents support the grant claim.
Summary
Most air-to-water heat-pump installations require around 2–4 days of on-site work.
The complete process from initial consultation to commissioning typically takes 3–6 weeks.
Most household disruption is concentrated into the 1–3 day period when the old heating system is disconnected and the new system is integrated.
Other resources:
SEAI Heat Pump Grant Explained
Required Upgrades – Before Installation
Radiators vs Underfloor Comparison