Room & Pool Calculators
Air Conditioners, Heat Pumps & Refrigeration
24000 BTU Inverter Midwall Split Air Conditioner – Alpha, WiFi – Sirair
18000 BTU Inverter Midwall Split Air Conditioner – Alpha, WiFi – Sirair
21kW Inverter Pool Heat Pump – WiFi Smart, Silent Pool Heating – Sirair
7.7kW Inverter Pool Heat Pump – WiFi Smart, Silent Pool Heating – Sirair
10kW Inverter Pool Heat Pump – WiFi Smart, Silent Pool Heating – Sirair
Room Size Calculator
Find the right air conditioner for your room.
1. Enter your room's dimensions
— or, if you already know it —
Recommended for a — room
View allEnter your room size and we'll show the right air conditioners right here.
We don't have that exact size in stock right now — get in touch and we'll help you find the right unit.
Recommended capacity
| Maximum room size (m²) | Recommended BTU |
|---|---|
| ± 18 m² | 9 000 BTU |
| ± 24 m² | 12 000 BTU |
| ± 36 m² | 18 000 BTU |
| ± 48 m² | 24 000 BTU |
| ± 60 m² | 30 000 BTU |
Larger or open-plan areas may need more than one unit — contact our team for a free assessment.
Please Note: Installation conditions will determine whether the recommended BTU capacity is sufficient. Environmental and site-specific factors may influence the required unit size, and a larger capacity may be necessary.
Pool Size Calculator
Find the right heat pump for your pool.
Square or rectangular pool
Recommended — heat pump
View allEnter your pool dimensions and we'll show the right heat pumps right here.
We don't have that exact size in stock right now — get in touch and we'll help you find the right heat pump.
Kidney or oblong shaped pool
Irregular shapes are estimated using a standard industry approximation, so treat the result as a close guide — for an exact quote, our team can help.
Recommended — heat pump
View allEnter your pool dimensions and we'll show the right heat pumps right here.
We don't have that exact size in stock right now — get in touch and we'll help you find the right heat pump.
Recommended wattage
| Recommended kW | Maximum pool size |
|---|---|
| 7.7 kW | up to 28 000 litres |
| 10 kW | up to 35 000 litres |
| 13.2 kW | up to 45 000 litres |
| 17.1 kW | up to 55 000 litres |
| 21 kW | up to 75 000 litres |
| 28.2 kW | up to 90 000 litres |
Bigger pool, or want a second opinion on your estimate? Get in touch and we'll size it for you.
Please Note: Recommended heat pump sizing is based on standard operating conditions. Actual performance will vary depending on ambient air temperature, water temperature, pool size, weather conditions, wind exposure, use of a pool cover, and installation conditions. Lower ambient temperatures will reduce heating capacity and increase heating times.