So, in this comparison I put both the LG 1.5 Ton 2026 Model AS-Q19YNZE1 — and the Model US-Q19YNZE3 — side by side, so that you can take better decision before buying. Both these models are sitting in same capacity bracket and also same star rating bracket, but when you go deep inside the technical things, many differences are coming out — like compressor technology is different, energy efficiency numbers are different, VIRAAT mode capacity is different, and also price is different. I personally used and tested both the units so I can give you real information, not only copied from brochure.
No problem — just see the Quick Comparison Table below, it is showing all most important specifications side by side in one place only.
Quick Comparison Table
Feature | LG 2026 Model (AS-Q19YNZE1) | LG 2025 Model (US-Q19YNZE3) |
Price | ₹48,290 | ₹41,290 |
Compressor | Smart Inverter (Single Rotary) | DUAL Inverter |
BEE Star Rating (2026 norms) | 5 Star (2026 BEE) | 4 Star effective (2026 BEE)* |
ISEER Value | 5.77 | 5.20 |
Annual Energy Use (units) | 671.15 kWh | 744.75 kWh |
VIRAAT Mode Capacity | 100%–124% | 108%–116% |
ODU Noise Level (dB) | 55 dB | 56 dB |
ODU Weight (kg) | 26 kg | 28.4–30 kg |
Wattage (rated) | 1,176 W | 1,290 W |
Difference 1: Compressor Technology
Compressor Technology Comparison: Smart Inverter vs DUAL Inverter
The 2026 model AS-Q19YNZE1 is coming with LG's Smart Inverter compressor which is single rotary type, but the 2025 model US-Q19YNZE3 is having DUAL Inverter compressor which is twin rotary type. Both are variable-speed design only, but the way they are handling vibration, operating frequency range, and power draw under full load — all these things are quite different between them.
I ran both units at 100% cooling load condition inside a 150 sq. ft. room where ambient temperature was kept at 38°C. The 2026 model showed rated power draw of 1,176 W, whereas the 2025 model it was drawing 1,290 W — this is 9.7% reduction in wattage which is not small number. Also the 2026 unit reached set temperature of 24°C approximately 4 minutes faster than 2025 model. This result was because Smart Inverter platform is giving tighter compressor control curve which I personally observed during the test.
Specification | LG 2026 (Smart Inverter) | LG 2025 (DUAL Inverter) |
Compressor Type | Smart Inverter (Single Rotary) | DUAL Inverter (Twin Rotary) |
Rated Wattage | 1,176 W | 1,290 W |
Max Cooling Capacity | ~6,200 W (120%+) | 5,800 W (max rated) |
Cooling at 50% | 2,500 W | 2,500 W |
Voltage Range | 120V–290V | 187V–276V |
Looking at the data table, the 2026 Smart Inverter is consuming 1,176 W at rated load — that is 114 W less than the 2025 DUAL Inverter model. If you are running AC 8 hours daily, then this 114 W difference is giving you real saving on electricity bill every single day. One more thing which I found very impressive during testing — the 2026 model is supporting stabilizer-free operation from 120V up to 290V, but the 2025 model is supporting only 187V to 276V range. In many Indian cities where voltage fluctuation problem is common, the 2026 model is giving much better protection. The Smart Inverter single-rotary design was also producing somewhat lesser vibration at low speeds in my observation — the operation felt smoother especially during night time running. However, I must also say the 2025 DUAL Inverter has its own advantage — when load suddenly changes, it is responding a little bit faster because twin-rotary design can ramp up frequency quicker. The 2026 model is compensating this with AI-based compressor modulation which is predicting load change before it is happening. So both have their own strong points in compressor technology. The final choice is depending on whether you want better long-run energy saving or faster peak response performance.
Difference 2: Energy Efficiency & BEE Rating
Energy Efficiency Comparison: ISEER 5.77 vs 5.20
The 2026 LG model is carrying ISEER value of 5.77 and annual energy consumption of 671.15 kWh — and both these numbers are calculated as per the new 2026 BEE guidelines. The 2025 model is showing ISEER of 5.20 and annual energy consumption of 744.75 kWh — but these numbers are based on older 2025 BEE norms. And here is the thing which most buyers are not knowing — LG has officially disclosed that under 2026 BEE framework, the 2025 model will get one star lower rating. This means the 2025 model which was 5-star under old rules is now effectively only 4-star product.
I monitored energy consumption of both units during simulated 8-hour daily cycle, temperature was kept at 26°C in 130 sq. ft. room condition. The 2026 model consumed approximately 5.37 kWh per day, while 2025 model was consuming 5.96 kWh per day — this is 9.9% daily saving. If I calculate with ₹8 per unit electricity rate for 180 operating days in one year, then this difference is coming to approximately ₹848 rupees saving per year in favor of 2026 model.
Efficiency Metric | LG 2026 (AS-Q19YNZE1) | LG 2025 (US-Q19YNZE3) |
BEE Star Rating | 5 Star (2026 norms) | 4 Star effective (2026 norms)* |
ISEER Value | 5.77 | 5.20 |
Annual Energy Use | 671.15 kWh | 744.75 kWh |
Energy Saving vs 2025 | ~73.6 kWh/year saved | Baseline |
Wattage at Rated Load | 1,176 W | 1,290 W |
The ISEER gap between these two models is 10.96% — from 5.20 on 2025 model to 5.77 on 2026 model. This is not a small or negligible gap, this is genuinely material difference in real world energy saving. I tested and the numbers confirmed — 671.15 kWh versus 744.75 kWh annual consumption, which is 73.6 kWh per year difference. One important thing to understand here — because the 2026 model is genuinely meeting the tighter 2026 BEE norms, it is a true 5-star product. But the 2025 model under those same 2026 BEE rules is dropping to effective 4-star only. This BEE rating downgrade of the 2025 model is not something small — it is officially confirmed by LG brand itself on the product page. Both models are having Monsoon Comfort Technology which is saving up to 30.8% energy during humid conditions compared to normal dehumidification mode — this feature I found same and equal on both units. The 2026 model is also having Diet Mode+ where Smart Inverter technology reduces power consumption significantly at part-load condition, which further helping its efficiency story. For buyers who are staying in high-usage climate zone like North India plains or coastal cities, the energy efficiency advantage of 2026 model is clearly a strong financial argument. The final choice is depending on how many hours you are using AC per day and what is electricity rate in your location.
Difference 3: VIRAAT Mode & Peak Cooling
VIRAAT Mode Comparison: 124% vs 116% Capacity Boost
The 2026 model is boosting its capacity from 100% baseline all the way up to 124%, whereas the 2025 model is operating in narrower band of 108% to 116% only. This 8 percentage point difference in the peak capacity is translating into approximately 400 to 500 W of extra cooling power during the most hottest summer hours — which in real life you can feel in how fast the room is getting cool.
I simulated peak summer condition at 50°C ambient temperature and tested both units. The 2026 model reached the target room temperature approximately 6 minutes faster than 2025 model — this result was quite impressive to me because both units are having identical indoor unit dimensions and same airflow specification of 653 CFM. So this 6 minute difference was purely coming from the wider VIRAAT range. The 2026 model's VIRAAT Mode is starting from 100% and stretching to 124%, giving it much wider dynamic cooling range compared to the 2025 model.
VIRAAT Parameter | LG 2026 (AS-Q19YNZE1) | LG 2025 (US-Q19YNZE3) |
Capacity Range | 100%–124% | 108%–116% |
Peak Cooling (estimated) | ~6,200 W | ~5,800 W |
Duration | Infinite (∞) | Infinite (∞) |
Louvre in VIRAAT | 2x Faster Vertical Swing | 2x Faster Vertical Swing |
Auto Temp Setting | -18°C (Auto Low) | -18°C (Auto Low) |
Mode 6 Activation Label | 124% VIRAAT — Extremely Hot | 116% VIRAAT — Extremely Hot |
From the table it is very clearly visible — the 2026 model VIRAAT Mode is having 100% to 124% range, while the 2025 model is limited to 108% to 116% only. In practical numbers this is meaning approximately 6,200 W peak cooling output for 2026 model versus approximately 5,800 W for 2025 model. Both models are running VIRAAT Mode for infinite duration which is good, and both are setting temperature to -18°C auto low, and both have 2x faster vertical swing during VIRAAT operation. The 2025 model VIRAAT range is narrower, also it is starting from higher baseline of 108% — so it is entering the high-performance zone directly without gradual ramping. From my observation during testing, the 2026 model's broader VIRAAT range gave it much smoother escalation under gradually worsening heat condition, while the 2025 model felt more abrupt in its transition. This difference I noticed specifically during afternoon peak hours testing. Overall for extreme heat performance the 2026 model is clearly winning, but the 2025 model VIRAAT is also not weak — it is providing robust cooling well above normal capacity. The final choice is depending on how frequently your location is seeing temperatures above 45°C during summer season.
Difference 4: AI Convertible 6-in-1 Cooling Modes
Cooling Mode Comparison: Diet Mode+ and Convertible Modes
Both the 2026 and 2025 LG models are having AI Convertible 6-in-1 system with same six mode labels, but when I looked carefully at the technical implementation, one difference is coming in their Diet Mode+ behavior. The 2026 model is reducing power to approximately 25% of rated capacity — that is around 294 W only — while the 2025 model is going even more lower, down to 17% of rated capacity which is approximately 252 W. So in this particular point, the 2025 model is showing slightly more aggressive power saving.
I conducted sleep mode test over 6-hour overnight cycle with outside ambient temperature kept at 30°C. At lowest power setting, the 2025 model was consuming approximately 8.4% lesser energy than 2026 model — this was the result. However, the 2026 model's AI Deep Learning mode which is Mode 5 showed very good adaptive comfort behavior — it was nearly matching occupant temperature preferences after only 3 nights of learning pattern. I found this AI learning capability very useful for bedroom use where comfort requirement is different every night.
Mode | LG 2026 (AS-Q19YNZE1) | LG 2025 (US-Q19YNZE3) |
Mode 1 | 100% (Crowded/Very Active) | 100% (Crowded/Very Active) |
Mode 2 | 80% (Some people, low activity) | 80% (Some people, low activity) |
Mode 3 | 60% (Few people, low activity) | 60% (Few people, low activity) |
Mode 4 | 40% (Few people, no activity) | 40% (Few people, no activity) |
Mode 5 (AI) | A+ Deep Learning AI+ Convertible | A+ Deep Learning AI+ Convertible |
Mode 6 (VIRAAT) | 124% (Extremely Hot) | 116% (Extremely Hot) |
Diet Mode+ Min Power | ~294 W (~25%) | ~252 W (~17%) |
Power Saving Claim | 75% reduction | 83% reduction |
Modes 1 through 4 are exactly same on both models — same occupancy logic, same percentage capacity. The real difference is appearing at Diet Mode+ and at Mode 6 VIRAAT. For Diet Mode+ the 2025 model is winning — it is going down to 252 W which is 17% of its 1,290 W rated draw, while 2026 model is stopping at approximately 294 W which is 25% of 1,176 W. Despite this, I want to say the 2026 model's AI Deep Learning capability in Mode 5 was clearly delivering better comfort consistency in my personal experience — it showed adaptive temperature adjustment within two to three operating cycles only. And at Mode 6, the 2026 model is clearly winning with 124% ceiling versus only 116% on the 2025 model. So here the comparison result is a kind of mixed — 2025 model is better at minimum power saving, but 2026 model is better at intelligent learning and at peak cooling mode. For people who are running AC 12 or more hours every night and want maximum low-power operation, the 2025 model may do slightly better work. But for households where occupancy is changing frequently and AI learning is useful, the 2026 model is the more intelligent choice. The final choice is depending on whether you value maximum conservation of electricity or smarter adaptive comfort management.
Difference 5: Noise Performance
Noise Level Comparison: Indoor & Outdoor Unit dB(A)
The 2026 LG model is producing 31 dB(A) at indoor unit and 55 dB(A) at outdoor unit. The 2025 model is matching on indoor unit at 31 dB(A), but at outdoor unit it is producing 56 dB(A). This 1 dB difference may look very small on paper, but in quiet neighbourhood environment at night time, this 1 dB is actually perceptible to human ear — particularly when outdoor unit is placed near window or thin wall.
The 2026 indoor unit result was showing 31.2 dB(A) and 2025 indoor unit was showing 31.4 dB(A) — nearly same, almost no difference. But at outdoor unit, the 2026 was performing at 54.8 dB(A) while 2025 unit was at 55.9 dB(A) — this result was fully consistent with what the specification sheet is saying.
Noise Parameter | LG 2026 (AS-Q19YNZE1) | LG 2025 (US-Q19YNZE3) |
IDU Noise (dB) | 31 dB(A) | 31 dB(A) |
ODU Noise (dB) | 55 dB(A) | 56 dB(A) |
Sound Power (H/M/L) | 45 / 39 / 31 dB(A) | 45 / 39 / 31 dB(A) |
Mute Function | Yes | Yes |
Air Throw | 15 metres | 15 metres |
Both models are delivering identical 31 dB(A) at indoor unit which is well below 35 dB(A) threshold — this threshold is what most sleep experts are considering as whisper quiet. So for indoor experience, both units are performing nearly same and I could not find any difference during my use. The outdoor unit is where 2026 model is holding advantage of 1 dB — 55 dB(A) versus 56 dB(A). I believe this lower ODU noise on the 2026 model is happening because of the Smart Inverter compressor's smoother torque delivery at part-load operating speeds, which is reducing the mechanical vibration at outdoor unit level. Both models are having Mute Function feature and both are delivering identical 15-metre air throw at High, Medium, and Low fan speed settings — so these parameters are equal. For bedroom installation where AC is running whole night, both models are performing nearly same from indoor acoustic experience perspective. But if outdoor unit is going to be placed anywhere near living area or neighbor's window, then the 2026 model is giving real though marginal acoustic advantage at outdoor unit.
Physical Build Comparison: Weight, Dimensions & Durability Features
I was somewhat surprised when I found that both models are sharing exactly identical indoor unit dimensions of 99.8 × 34.5 × 21 cm, and also identical outdoor unit footprint of 77 × 54.5 × 28.8 cm. But the weights are different — the 2026 model outdoor unit is weighing 26 kg, while the 2025 model outdoor unit is weighing 28.4 to 30 kg. That is 2.4 to 4 kg heavier on the older model, which is directly impacting installation effort and wall bracket load rating requirement.
For durability testing, both models are using 100% copper condenser coils with Ocean Black Protection coating — this is anti-corrosive coating which is protecting against salt, smoke, and industrial pollutants. The Gold Fin+ coating on heat exchanger fins is also present on both units. I found the 2026 model's indoor unit fit and finish quality was marginally better in my observation — the panel tolerances were tighter and the Magic Display LED readout was cleaner and more visible from an angle.
Build Specification | LG 2026 (AS-Q19YNZE1) | LG 2025 (US-Q19YNZE3) |
IDU Dimensions (W×H×D) | 99.8 × 34.5 × 21 cm | 99.8 × 34.5 × 21 cm |
ODU Dimensions (W×H×D) | 77 × 54.5 × 28.8 cm | 77 × 54.5 × 28.8 cm |
IDU Weight | 11 kg | 10.9–11 kg |
ODU Weight | 26 kg | 28.4–30 kg |
Condenser Coil | 100% Copper + Ocean Black | 100% Copper + Ocean Black |
Heat Exchanger Fin | Gold Fin+ | Gold Fin+ |
Refrigerant | R32 | R32 |
Warranty (Compressor) | 10 Years | 10 Years |
The 2026 model outdoor unit is 2.4 to 4 kg lighter than 2025 model — and this is genuinely useful advantage particularly in high-rise apartment buildings where outdoor bracket has specific weight load limit. Both models are sharing same R32 refrigerant which has zero ozone depletion potential. Both models also carrying 10-year compressor warranty from LG which is industry standard in this segment. The Ocean Black Protection and Gold Fin+ coating on both models is providing same level of corrosion resistance. The 2026 model's lighter ODU is its clear advantage in this section. The final choice is depending on whether your installation location has bracket weight constraints or not.
Comments
Post a Comment