LG PC24SQ (24,000 BTU, 6.6 kW) - Standard Plus wall-mounted inverter air conditioner with 7.5 kW heating and Wi-Fi

Standard Plus at 24 000 BTU: 6.6 kW of cooling and 7.5 kW of heating

The PC24SQ is the most powerful wall-mounted machine of the Standard Plus series in this catalogue: 6.6 kW of cooling, 7.5 kW of heating, 24 000 BTU and up to 70 m². The gap between heating and cooling is the widest among LG residential splits here - 900 W in favour of heating - meaning the machine is built just as seriously for both seasons. The indoor unit is the same as on the PC18SQ (item 1808): 998 by 345 mm, 210 mm deep, 12.7 kg - noticeably heavier than the units of the Inverter Pro series. A Dual Inverter compressor with two compression chambers, R32 refrigerant, classes A++ in cooling and A+ in heating. Control is by infrared remote plus Wi-Fi through LG ThinQ, which for a commercial space with opening hours matters more than it first appears.

7.5 kW of heat: the shoulder-season arithmetic

7.5 kW of heating over 70 m² is roughly 107 W per square metre, enough in a reasonably insulated space for full heating through the cool months with no additional heaters. The key figure is not the capacity but the ratio: in heating mode the machine delivers roughly three to four times more heat into the room than it draws in electricity, because it does not generate heat but moves it in from outdoors. For a shop or office still heated electrically in October and March, that is the fastest way to cut running costs without rebuilding the premises. The heating limit of LG residential R32 splits is about -10 °C, and the closer to that limit, the lower the real output: at -7 °C the machine will deliver noticeably less than the rated 7.5 kW. So it is not planned as the sole heat source for winter, though as the main source for spring and autumn it works well.

One wall unit over 70 m²: what you actually get

The 70 m² on the card is the limit of what a wall-mounted design can do, and its consequences are worth knowing in advance. The throw of such a machine reaches about 10-12 metres, so in a hall 10 by 7 metres the far end does get air, but the temperature difference between the zone in front of the unit and the far corner will be 2-3 degrees. In heating the situation is harder: warm air rises, and without a mixing mode a layer 3-4 degrees warmer than at head height collects under the ceiling. That is exactly why in spaces of this size the louvres are set to swing downwards in heating and horizontally in cooling. If the space has two zones rather than one - a hall and a back room, an office and a reception - two 3.5 kW machines or a cassette with four-way distribution is the better arrangement.

A detail on the card: 46 kg in the dimensions of the smaller model

The card lists the PC24SQ outdoor unit as 870 by 650 by 330 mm at 46 kg, while the technically close S24EQ (item 1811) carries the same weight with dimensions of 950 by 834 by 330 mm. The second combination looks more credible: 46 kg in a casing the size of an 18 000 BTU unit would be unusually dense packaging. The practical conclusion: before ordering brackets and agreeing the location, confirm the outdoor unit dimensions against the data sheet of the specific variant, because the difference between 650 and 834 mm in height decides whether the unit fits a recess or sits under a window. We can send the actual unit dimensions from the supplier documentation before the order is placed. None of this affects the 46 kg - the fixings are designed around that figure with a margin either way.

Where to put a heavy outdoor unit

46 kg and a large coil area mean the location is chosen not for convenience but on three conditions: a rigid base, unobstructed airflow and access for service. On a wall it hangs on brackets rated for at least 100 kg with through-fixings into load-bearing material, not into insulation or cladding. On the ground it stands on a concrete base or a frame raised 30-40 cm, so the unit does not sit in snow and water and does not freeze to the ground in winter. At least a metre of free space is left in front of the unit, 50 cm above and 20-30 cm behind, otherwise hot air recirculates and output drops in a heatwave, exactly when it is needed most. A run of up to 30 metres allows the unit to be placed in the far corner of a yard or on a roof, and that option is worth using when the facade faces the neighbours' windows.

Electrics and scheduled control

The machine is single-phase, 220-240 V, 50 Hz; at full cooling it draws roughly 2.1-2.4 kW and in heating up to 2.5 kW, about 10-11 A. The circuit is run in 4 mm² copper with its own breaker to the design; in a shop with refrigeration equipment the air conditioner's load is counted in the overall service balance. Wi-Fi and LG ThinQ here provide not comfort but savings: the machine can start on a schedule 30-40 minutes before opening and stop at closing time without relying on staff. Consumption statistics in the app help you see how much the air conditioner actually adds to the bill in the hottest weeks. A surge protection relay is mandatory: in a commercial space full of equipment, voltage sags happen regularly and the inverter board is sensitive to them.

Which jobs it fits and where it is out of place

The PC24SQ makes sense in a sales floor, a cafe, a salon, a gym, an open-plan office or a large living room of 50-70 m² that needs cooling in the heat and heating in the cool months. It wins especially where there is no gas and electric heating is expensive: 7.5 kW of heat with a conversion ratio around three is markedly cheaper than the same kilowatt from a resistive heater. Where the model is out of place: spaces with partitions and separate offices; halls with ceilings above 3.5 m, where warm air collects overhead; bedrooms and quiet studies, because 31 dB(A) from the indoor unit is audible. Year-round cooling of a server room needs a machine with a low-ambient kit. And for full winter heating, a Therma V heat pump such as the HU161MA.U33RU (item 1884) is the answer.

How it differs from neighbouring models in this catalogue

The S24EQ (item 1811) is the same machine without Wi-Fi: output, pipework, run length and noise are identical, with control by infrared remote only. The PC18SQ (item 1808) is the smaller model of the series at 5 kW of cooling and 5.8 kW of heating for spaces up to 50 m², with a 1/2 inch line and a 25 m run. The WZ24AWN (item 1807) is the Inverter Pro of this capacity: 6.95 kW of both cooling and heating, a lighter 11 kg indoor unit, but no heating bias. The H24S1D (item 1803) is the Deluxe rated A+++ at 26 dB(A): more frugal in daily duty and quieter in the room, but its outdoor unit is 60 dB(A) against 53 dB(A) here. The CT24R (item 1837) is a cassette of the same output: a dearer installation that needs a suspended ceiling, but an even temperature across the whole floor with no cold jet in one direction.

Tell us whether you plan to use the machine for heating in spring and autumn, and we will compare the PC24SQ with a cassette for the same area and send the actual outdoor unit dimensions.