This article compares the rated energy efficiency of several generations of GENERAL / Fujitsu General reverse-cycle high wall split systems.
The comparison covers common 09, 12, 18, 22, 24, 30 and 34 capacity classes across the LVCC, KMCA/KMTA, KMCB/KMTB, KMTC, KMTD and KMTE ranges.
How is efficiency compared?
| Measure | Meaning |
|---|---|
| EER | Energy Efficiency Ratio for cooling. Rated cooling output divided by rated electrical input. A higher number indicates greater rated cooling efficiency. |
| COP | Coefficient of Performance for heating. Rated heating output divided by rated electrical input. A higher number indicates greater rated heating efficiency. |
Model Naming Across the Ranges
| Range / Generation | Typical Models | Notes |
|---|---|---|
| LVCC | ASTG09LVCC through ASTG34LVCC | Earlier Classic high wall range. Predominantly R410A. |
| KMCA / KMTA | ASTG09-24KMCA ASTG30KMTA / ASTG34KMTA | Earlier R32 Lifestyle generation. 30 and 34 models use the KMTA suffix. |
| KMCB / KMTB | ASTG09-24KMCB ASTG30KMTB / ASTG34KMTB | Later Lifestyle generation with Wi-Fi functionality. Rated EER/COP figures are generally unchanged from the equivalent KMCA/KMTA models. |
| KMTC | ASTG09KMTC through ASTG34KMTC | Later Lifestyle range with updated seasonal performance and controls. |
| KMTD | ASTH18KMTD ASTH22KMTD ASTH24KMTD ASTH30KMTD ASTH34KMTD | Newer generation uses the ASTH indoor-unit prefix. 09 and 12 capacity models remain KMTC in the current Lifestyle family. |
| KMTE | ASTH24KMTE | 7.1 kW Lifestyle variant. Do not assume its rated-point EER/COP is identical to the KMTD or KMTC version. |
EER / COP Comparison by Capacity
Figures below are shown as EER Cooling / COP Heating. Higher figures represent better efficiency at the rated test condition.
| Capacity | LVCC | KMCA / KMTA | KMCB / KMTB | KMTC | KMTD / KMTE |
|---|---|---|---|---|---|
| 09 Approx. 2.5 kW | 4.31 / 4.66 | 4.90 / 4.92 | 4.90 / 4.92 | 4.71 / 4.84 | - |
| 12 Approx. 3.5 kW | 3.80 / 4.32 | 4.07 / 4.57 | 4.07 / 4.57 | 3.93 / 4.68 | - |
| 18 Approx. 5.0 kW | 3.27 / 4.03 | 4.10 / 4.23 | 4.10 / 4.23 | 4.31 / 4.69 | KMTD 4.31 / 4.69 |
| 22 Approx. 6.0-6.3 kW | 3.23 / 3.55 | 3.77 / 4.07 | 3.77 / 4.07 | 3.80 / 4.24 | KMTD 3.80 / 4.24 |
| 24 Approx. 7.1 kW | 3.27 / 3.54* | 3.53 / 3.77 | 3.53 / 3.77 | 3.41 / 4.19 | KMTD: 3.41 / 4.19 KMTE: 3.23 / 3.92 |
| 30 Approx. 8.0-8.5 kW | 3.31 / 3.41* | KMTA 3.45 / 3.84 | KMTB 3.45 / 3.84 | 3.45 / 3.84 | KMTD 3.41 / 3.77 |
| 34 Approx. 9.2-9.5 kW | 3.29 / 3.30* | KMTA 3.38 / 3.63 | KMTB 3.38 / 3.63 | 3.38 / 3.63 | KMTD 3.49 / 3.39 |
* Historical LVCC 24/30/34 EER and COP values are calculated from the published rated capacity and rated input-power figures for those systems.
What Does the Comparison Show?
The early KMCA/KMCB models were already highly efficient at their rated operating point. The later KMTC remains highly efficient, although its individual EER or COP figure is not necessarily higher in every mode.
These capacities show one of the clearest efficiency improvements over the earlier LVCC Classic models. The KMTC/KMTD 18 model increases rated cooling EER from approximately 3.27 to 4.31 and heating COP from approximately 4.03 to 4.69.
The KMTC/KMTD generation provides a particularly strong improvement in rated heating efficiency compared with the older LVCC model. The KMTE is a different system configuration and should not be assumed to have the same EER/COP as the KMTD simply because it is a later suffix.
Changes between generations are smaller and are not always in the same direction for cooling and heating. For example, the newer 34 KMTD has a higher rated cooling EER than the KMTC, but a lower rated heating COP.
From an EER/COP perspective, the equivalent KMCA/KMTA and KMCB/KMTB models are essentially the same. The KMCB generation should therefore not be described as an efficiency upgrade purely on the basis of the model suffix. Its major product changes included additional connectivity and control features.
Zoned Energy Rating Labels
Current non-ducted split systems use a Zoned Energy Rating Label. Unlike the older single cooling/heating star-rating system, the current label provides separate seasonal efficiency ratings for:
- Hot climate
- Average climate
- Cold climate
The seasonal rating considers performance across a range of outdoor temperatures rather than only the rated EER/COP test condition.
Example - Replacing an ASTG18LVCC
| Model | Cooling Capacity | EER | Heating Capacity | COP |
|---|---|---|---|---|
| ASTG18LVCC | 5.0 kW | 3.27 | 6.0 kW | 4.03 |
| ASTG18KMTC / ASTH18KMTD | 5.0 kW | 4.31 | 6.0 kW | 4.69 |
In this example the rated capacity remains approximately the same, but substantially less electrical input is required at the rated test condition to produce each kW of cooling or heating.
Important Comparison Notes
- Compare matched indoor and outdoor units, not the indoor model alone.
- Compare systems with a similar rated capacity.
- EER and COP represent rated operating conditions, not every operating condition.
- Inverter systems vary compressor speed and electrical input during normal operation.
- Actual energy consumption depends on room load, insulation, temperature setting, climate, installation quality and operating time.
- Do not directly compare an old star rating with a current Zoned Energy Rating Label.
- For current products, use the Hot, Average or Cold climate rating applicable to the installation location.
The information in this article is intended as a technical comparison reference. Specifications may vary by market, production revision and matched outdoor unit. Always confirm the complete indoor and outdoor model numbers and refer to the applicable product specification before providing a definitive efficiency or running-cost comparison.
Energy efficiency figures do not provide a guaranteed electricity consumption or running cost. Actual consumption will vary according to installation conditions, climate, building heat load, user settings and operating patterns.
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