Head to head
LG Therma V Monobloc S 9.00kW vs Vaillant ecoTEC plus 835 35kW combi
The LG Therma V Monobloc S 9.00kW is a r32 monobloc air source heat pump, 9.00 kw heat output. The Vaillant ecoTEC plus 835 35kW combi is a gas combi boiler, 35 kw hot water output.
Last reviewed 13 September 2026
Specifications side by side
| LG Therma V Monobloc S 9.00kW | Vaillant ecoTEC plus 835 35kW combi | |
|---|---|---|
| Dimensions | 1239 x 1380 x 330 mm (H x W x D) | 720 x 440 x 372 mm |
| Heat output | 9.00 kW at 7C/35C flow | - |
| SCOP | 4.55 (average climate, 35C flow) | - |
| Refrigerant | R32, GWP 675 | - |
| Sound power | 61 dB(A) rated, 56 dB(A) low noise mode | - |
| Weight | 90.0 kg | - |
| Max flow temperature | 65C | - |
| Hot water output | - | 35 kW |
| Central heating output | - | 32.8 kW |
| ErP class | - | A |
| Seasonal efficiency | - | 94% |
| Warranty | - | 10 years with Vaillant Advance Boiler Protection Kit |
| Hot water flow rate | - | 14.3 litres per minute |
Sources: LG Therma V Monobloc S 9.00kW, Vaillant ecoTEC plus 835 35kW combi. 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 ecoTEC plus 835 35kW combi if...
A gas combi boiler with 35 kW of hot water output, sized for a larger house with two bathrooms. It delivers about 14.3 litres per minute of hot water, which decides how well a shower runs while a tap is on. Warranty: 10 years with Vaillant Advance Boiler Protection Kit. Seasonal efficiency is 94%.
Full ecoTEC plus 835 35kW combi specifications →Common questions
What is the difference between the LG Therma V Monobloc S 9.00kW and the Vaillant ecoTEC plus 835 35kW combi?
The LG Therma V Monobloc S 9.00kW is a r32 monobloc air source heat pump, 9.00 kW heat output; the Vaillant ecoTEC plus 835 35kW combi is a gas combi boiler, 35 kW hot water output.
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