BuderusWLW-7 MB A H-Hybrid
The Buderus WLW-7 MB A H-Hybrid is an air-to-water heat pump with a SCOP of 4.2 (35 °C) and a sound power level of 42 dB(A). In Ireland a heat pump is exempt from planning permission if it stays below 43 dB(A) (or 5 dB(A) above background noise, if higher), measured at the nearest neighbouring inhabited dwelling. Free-standing, the indicative minimum distance is 0.5 m; against a wall 0.5 m.1
Key figures
Rules in Ireland
These rules are still being verified.
Minimum distance to your neighbour
Planning and Development Regulations 2001 (S.I. No. 600/2001), Sch. 2, Part 1, Class 2(d), inserted by S.I. No. 83/2007; location rules relaxed by exempted-development regulations of July 2026 (incl. S.I. No. 342/2026)2 · nearest neighbouring inhabited dwelling
Indicative calculation (hemispherical, no barriers). Your installer must confirm the noise level at the nearest neighbouring dwelling.
SEAI Heat Pump System Grant
Not eligibleUp to €14,500 for a house (€11,500 for an apartment), including a €2,000 boiler scrappage grant when an oil, gas, solid-fuel or storage-heater system is removed. Homes built before 2007 need a technical assessment (€200 grant) unless the BER shows a Heat Loss Indicator of 2.3 or less. Installation is charged at 9% VAT.4
- The heat pump must be listed on SEAI's Home Appliance Register of Performance (HARP) and installed by an SEAI-registered contractor.
- Home built and occupied before 2021, with an MPRN; grant approval before any work starts and a BER assessment afterwards.
- Hybrid heat pumps (with a gas or oil boiler) are not covered by the SEAI heat pump grant.
Technical specifications
| General | |
|---|---|
| Type (source) | Air-to-water1 |
| System | Hybrid (with gas boiler)1 |
| Compressors | 11 |
| Capacity control | drehzahlregelung1 |
| Performance | |
| Rated output 35 °C | 6.6 kW1 |
| Rated output 55 °C | 6.6 kW1 |
| Efficiency | |
| SCOP (35 °C) | 4.21 |
| SCOP (55 °C) | 3.281 |
| Seasonal efficiency ηs 35 °C | 165 %1 |
| Seasonal efficiency ηs 55 °C | 128 %1 |
| COP A7/W35 | 4.51 |
| COP A2/W35 | 4.411 |
| COP A-7/W35 | 2.541 |
| Noise | |
| Outdoor unit sound power | 42 dB(A)1 |
| Indoor unit sound power | 39 dB(A)1 |
| Refrigerant | |
| Refrigerant | R2901 |
| Refrigerant charge | 0.95 kg1 |
| Electrical | |
| Max. power input | 2.9 kW1 |
| Connectivity & smart | |
| SG Ready | Yes1 |
Manufacturer documentation
- Brochure / leaflet — Wärmepumpen-Hybridsysteme – Broschüre
External links to Buderus's official website. The manufacturer may change or move documents; where they differ, the manufacturer's latest version applies.
Frequently asked questions
Do I need planning permission for the Buderus WLW-7 MB A H-Hybrid in Ireland?
Not if it meets the exempted-development conditions (Planning and Development Regulations 2001 (S.I. No. 600/2001), Sch. 2, Part 1, Class 2(d), inserted by S.I. No. 83/2007; location rules relaxed by exempted-development regulations of July 2026 (incl. S.I. No. 342/2026)): no more than 43 dB(A) at the nearest neighbouring inhabited dwelling, or 5 dB(A) above background noise if that is higher. With a sound power of 42 dB(A) that indicatively means 0.5 m free-standing, 0.5 m against a wall or 0.7 m in a corner. Ask your SEAI-registered installer to confirm.1
Which refrigerant does the Buderus WLW-7 MB A H-Hybrid use?
The Buderus WLW-7 MB A H-Hybrid uses R290.1
Sources
- List of eligible heat pumps (BEG) — Bundesamt für Wirtschaft und Ausfuhrkontrolle (BAFA) · accessed 27 Sept 2026
- Planning and Development Regulations 2001 (S.I. No. 600/2001), Sch. 2, Part 1, Class 2(d), inserted by S.I. No. 83/2007; location rules relaxed by exempted-development regulations of July 2026 (incl. S.I. No. 342/2026)
- Heat Pump System Grants — SEAI · accessed 4 Oct 2026
- Heat pump heating system (VAT) — Revenue · accessed 4 Oct 2026