Home / Sizing calculator
Size your heat pump. See what it costs to run.
Move the sliders and the numbers update as you go. It's an estimate from our own formula. The final size is confirmed with you after we've seen photos.
OutputSep–May · 28°C · cover on
5
kW · recommended
Suitable range
9–11kW
Suggested size: 11
Pool volume
0L
0 m² surface
First warm-up
≈0hrs
+6°C from cold, cover on
Running cost by month
Estimated · your season · ~$1.92 per heating day
Season total
$0–$0
Estimate only. Weather, shade, wind, cover use and run hours all change the result. Not a performance guarantee.
Method
How the numbers are worked out.
A simplified formula giving an indicative size and running cost. Final sizing is confirmed against the supplier's published ratings.
area = length × width · volume = area × depth × 1,000 L
kW = area × 0.34 × season × temperature × cover × exposure
season: Oct–Apr 1.00 · Sep–May 1.15 · all year 1.40
temperature: ±8% per °C from 28 · cover 0.83 · exposed 1.20
round up to the next size made · cost = heat ÷ COP 5.0 × days × c/kWh, shown ±20%