Pool Heat Pump Retrofit ROI & Carbon Calculator

Pool heat pumps lose 1.5–2.0% of their COP per year of service, primarily from compressor wear, fouled coils, and refrigerant migration. After 8 years a unit rated at COP 5.0 typically delivers an effective COP of 4.2 — meaning 19% more electricity to do the same job.

All split heat pumps lose a fraction of their refrigerant charge each year through joints, schraders, and end-of-life disposal. R410A has a Global Warming Potential of 2,088 — every 1 kg leaked is the climate equivalent of 2.1 tonnes of CO₂. Karnot iSPA R32 has a GWP of 675 — a 68% reduction per kg leaked. This is the Scope 1 component of your carbon footprint.

Scope 1 is direct emissions from your equipment — in this case, refrigerant leaks. Scope 2 is indirect emissions from purchased electricity. The Philippines grid emits about 0.71 kg CO₂ per kWh (largely coal). For ESG reporting, condos and commercial pool operators must account for both.

Pools target 28–30°C against a 30–32°C ambient — effectively zero net lift. R32 inverter compressors modulate down to 30% capacity at this duty, achieving COPs of 8–14 at part load. The annualised blended COP for a Philippine pool is typically 9–11.

In most cases, yes. iSPA R32 units use the same hydraulic interfaces (40 mm or 50 mm PVC unions) and the same 220 V/240 V single-phase electrical connection. Site-specific work is limited to commissioning and refrigerant charge. Karnot will run a free site assessment before quoting.