How to Pick the Right Hisense Aircond: A Capacity Guide by Room Size
August 11, 20262 min read
1.0HP or 2.0HP? A simple guide to choosing Hisense capacity based on room size, how many people use it, and where it is.
Getting the Capacity Wrong Costs You
An undersized unit never cools, the compressor overworks, and the bill climbs. An oversized unit overcools, leaves the room clammy, and wastes electricity.
Capacity by Room Size
The table below is a safe starting point for most Malaysian homes. Adjust upward if your room hits any of the factors in the next section:
| Room size | Right capacity | BTU | Suggested model |
|---|---|---|---|
| Under 150 sq ft | 1.0HP | 9,500 | Hi-Cool 1.0HP |
| 150-250 sq ft | 1.5HP | 12,000 | Hi-Cool 1.5HP |
| 250-400 sq ft | 2.0HP | 18,000 | Fresh Master 2.0HP |
| Over 400 sq ft | 2.5HP | 24,000 | Hi-Cool 2.5HP |
Other Factors Worth Weighing
Room size alone does not settle the capacity. These four factors are why a unit that looks correctly sized still fails to cool:
1. Which Floor?
- Upper floors run hotter, because heat rises
- Add 0.5HP for an upstairs room with no insulation
2. How Many People?
- Every person radiates roughly 100W of body heat
- An office of ten people adds 1kW — add 0.5HP
3. Which Way Does the Room Face?
- A west-facing room is the hottest, catching the afternoon sun
- Add 0.5HP for a west-facing room without tinted glass
4. What Equipment Is in There?
- A kitchen with an oven adds heat
- A server room generates a lot of heat from the machines
A Room-by-Room Guide
If you would rather skip the arithmetic, here is our recommendation room by room:
| Room | Suggested capacity | Best model |
|---|---|---|
| Small bedroom | 1.0HP | Silentium (quiet) |
| Master bedroom | 1.5HP | Fresh Master (clean air) |
| Living room | 2.0HP | Fresh Master (for the family) |
| Small office | 1.0-1.5HP | Hi-Cool (economical) |
| Shop or retail | 2.0-2.5HP | Hi-Cool (value) |
Ways to Save
- Inverter beats non-inverter — 40-60% less electricity over the long run
- Do not overcool — 24-25°C is comfortable, and every degree lower costs about 6% more
- Service it on schedule — a dirty unit uses 20% more electricity
Not sure? WhatsApp us a photo of the room and we will recommend the capacity and model. Free of charge.