Head to head
LG Therma V Monobloc S 9.00kW vs Worcester Bosch Greenstar 5800i AW 5kW
The LG Therma V Monobloc S 9.00kW is a r32 monobloc air source heat pump, 9.00 kw heat output. The Worcester Bosch Greenstar 5800i AW 5kW is a r290 monobloc air source heat pump, 6.80 kw heat output.
Last reviewed 13 September 2026
Specifications side by side
| LG Therma V Monobloc S 9.00kW | Worcester Bosch Greenstar 5800i AW 5kW | |
|---|---|---|
| Heat output | 9.00 kW at 7C/35C flow | 6.80 kW at 7/35C |
| SCOP | 4.55 (average climate, 35C flow) | 4.53 (MCS, 35C flow) |
| Refrigerant | R32, GWP 675 | R290 (propane) |
| Dimensions | 1239 x 1380 x 330 mm (H x W x D) | 800 x 1100 x 540 mm (H x W x D) |
| Weight | 90.0 kg | 143 kg |
| Max flow temperature | 65C | 75C |
| Sound power | 61 dB(A) rated, 56 dB(A) low noise mode | - |
| Sound pressure | - | 42 dB(A) |
Sources: LG Therma V Monobloc S 9.00kW, Worcester Bosch Greenstar 5800i AW 5kW. Figures vary by model year and options, so check with the supplier before you commit.
Buy or hire the Therma V Monobloc S 9.00kW if...
An LG Therma V Monobloc S rated at 9.00kW, using R32 refrigerant and reaching a 65C flow. A low noise mode drops the sound power to 56 dB(A), useful where the outdoor unit sits close to a boundary or window.
Full Therma V Monobloc S 9.00kW specifications →Buy or hire the Greenstar 5800i AW 5kW if...
Worcester Bosch's entry-size 5800i AW, using the natural refrigerant R290 and reaching a 75C flow temperature for existing radiator systems. It is marketed as one of the quieter units in this size at 42 dB(A) sound pressure.
Full Greenstar 5800i AW 5kW specifications →Common questions
What is the difference between the LG Therma V Monobloc S 9.00kW and the Worcester Bosch Greenstar 5800i AW 5kW?
The LG Therma V Monobloc S 9.00kW is a r32 monobloc air source heat pump, 9.00 kW heat output; the Worcester Bosch Greenstar 5800i AW 5kW is a r290 monobloc air source heat pump, 6.80 kW heat output.
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