Head to head
LG Therma V Monobloc S 5.50kW vs Vaillant aroTHERM plus 5kW
The LG Therma V Monobloc S 5.50kW is a r32 monobloc air source heat pump, 5.50 kw heat output. The Vaillant aroTHERM plus 5kW is a r290 monobloc air source heat pump, 5 kw heat output.
Last reviewed 13 September 2026
Specifications side by side
| LG Therma V Monobloc S 5.50kW | Vaillant aroTHERM plus 5kW | |
|---|---|---|
| Heat output | 5.50 kW at 7C/35C flow | 5 kW |
| SCOP | 4.46 (average climate, 35C flow) | up to 5.03 |
| Refrigerant | R32, GWP 675 | R290 (propane), low GWP |
| Sound power | 57 dB(A) rated, 54 dB(A) low noise mode | 53 dB(A) at A7/W35, 58 dB(A) at A7/W55 |
| Dimensions | 1239 x 834 x 330 mm (H x W x D) | 965 x 1100 x 450 mm (H x W x D) |
| Weight | 89.5 kg | 128 kg (operating) |
| Max flow temperature | 65C | 75C |
Sources: LG Therma V Monobloc S 5.50kW, Vaillant aroTHERM plus 5kW. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Therma V Monobloc S 5.50kW if...
An LG Therma V Monobloc S rated at 5.50kW, using R32 refrigerant and reaching a 65C flow. A low noise mode drops the sound power to 54 dB(A), useful where the outdoor unit sits close to a boundary or window.
Full Therma V Monobloc S 5.50kW specifications →Buy or hire the aroTHERM plus 5kW if...
The smallest aroTHERM plus, sized for a well-insulated flat or small house. It uses the natural refrigerant R290 rather than an F-gas, and reaches a 75C flow temperature, which helps it work with existing radiators on a retrofit job.
Full aroTHERM plus 5kW specifications →Common questions
What is the difference between the LG Therma V Monobloc S 5.50kW and the Vaillant aroTHERM plus 5kW?
The LG Therma V Monobloc S 5.50kW is a r32 monobloc air source heat pump, 5.50 kW heat output; the Vaillant aroTHERM plus 5kW is a r290 monobloc air source heat pump, 5 kW heat output.
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