Madimack InverECO Plus 28kW Pool Heat Pump
Madimack InverECO Plus 28kW Pool Heat Pump is temporarily out of stock and will ship as soon as it's available.
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Delivery and Shipping Info*
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Madimack InverECO Plus 28kW Pool Heat Pump
Madimack InverECO Plus 28kW Pool Heat Pump is temporarily out of stock and will ship as soon as it's available.
Madimack InverECO Plus 28kW Pool Heat Pump
Madimack InverECO Plus 28kW — an efficient, quiet entry-level pool heat pump with reverse-cycle heating and cooling, sized for extra-large residential and small commercial pools. Peak COP of 11.0 keeps running costs low, WiFi control is built in, and the titanium heat exchanger is backed by a 25-year warranty.
- Physically Stocked, unlike most "drop-shipping" websites.
- Shipped from VIC, NSW, WA, QLD
- Documentation: Brochure | User Manual | Sizing Chart
- Shipping: Someone may be required to help lift the heater from the delivery truck if a tailgate lifter isn't available.
Note: The 28kW model is the largest in the InverECO Plus range and delivers the highest peak COP (11.0) of any model in the series.
Choose Your Size — InverECO Plus Range
The InverECO Plus is available in 6 sizes. This page is for the 28kW model. View other sizes:
Unsure which size is right for your pool? View the Madimack Sizing Chart or contact our team for a recommendation.
InverECO Plus 28kW — Key Specifications
- Model code: ECO PLUS 280
- Heating Capacity (Air 27°C / Water 27°C / 80% humidity): 28.0 kW
- Heating Capacity (Air 15°C / Water 26°C / 70% humidity): 19.5 kW
- COP Range (warm conditions): 11.0~6.3
- COP Range (cool conditions): 6.5~4.4
- Cooling Capacity (Air 35°C / Water 28°C / 80% humidity): 10.8 kW
- Rated Input Power: 0.89~4.43 kW
- Rated Input Current: 3.87~19.3 A
- Maximum Input Current: 23.5 A
- Sound Level at 1 m: 48.6~60.5 dB(A)
- Sound Level at 10 m: 28.6~40.5 dB(A)
- Recommended Water Flow: 180 L/min
- Power Supply: 230V / 1-Phase / 50Hz
- Electrical Connection: Hard Wired
- Net Weight: 68 kg
- Net Dimensions (L × W × H): 991 × 420 × 757 mm
- Water Connection: 40 mm
- Refrigerant: R32
- Operating Air Temperature: -5°C to 43°C
- Temperature Set Range: 12°C to 40°C
- Compressor: Full Stepless DC
- Heat Exchanger: Twisted Titanium
- Casing: Anti-corrosion ABS
Why Choose the InverECO Plus?
InverMAC Inverter Technology — Full stepless DC compressor and inverter fan adjust output continuously, saving up to 66% on running costs vs traditional pool heating and reducing energy use by up to 20% over on/off heat pumps.
WiFi Control Standard — Adjust pool temperature and set timers from anywhere using the Madimack app. No optional extras required.
Heating and Cooling — Reverse-cycle operation lets you warm the pool in cooler months and cool it down in summer.
Twisted Titanium Heat Exchanger — Suitable for salt, mineral, and chlorinated pools. Backed by a 25-year warranty.
Anti-Corrosion ABS Casing — Slim, weather-resistant design built to last in coastal and high-salt environments.
Active Defrost — Maintains performance in cold climates down to -5°C ambient air temperature.
R32 Refrigerant — Lower global warming potential than legacy refrigerants, more efficient heat transfer.
TüV Rheinland Certified — Independently certified for performance and safety.
Warranty*
- 5 years on all parts
- 5 years on the compressor
- 25 years on the heat exchanger
*Refer to Madimack's Warranty Schedule for full terms and conditions.
In plumbing, named sizes are not the actual measurements. A pipe called “50mm” or “2"” does not measure 50 mm across. Instead, it follows nominal sizing, an internationally-standardised naming system.
Use the Outside Diameter (OD) to check your pipe against fittings. Below is a quick reference for common spa & pool pipe sizes:
| Imperial Name | Metric Name | Pipe Diameter (OD) |
|---|---|---|
| 1/2" | 15mm | ~21.2–21.5 mm |
| 3/4" | 20mm | ~26.6–26.9 mm |
| 1" | 25 mm | ~33.4–33.7 mm |
| 1.5" | 40 mm | ~48.1–48.4 mm |
| 2" | 50 mm | ~60.2–60.8 mm |
| 2.5" | 65 mm | ~75.2–75.5 mm |
These are nominal sizes and are designed to fit matching fittings — not to measure exactly what their name suggests. These are based on PVC Pressure Pipe AS/NZ 1477 Dimensions1.
- º Internal diameters vary slightly by manufacturer and class.
- 1 Not all pool/spa fittings match these dimensions exactly. Some do not follow Australian or international standards. Chinese spas may use proprietary fittings.
Understanding Plumbing Sizes & Nominal Measurements
Plumbing sizes can be confusing. PVC and many other pipe systems use nominal sizes—the size is a name, not the exact measured dimension. This convention is used across most pool and spa systems so that pipes and fittings remain compatible.
Why pipe sizes don’t match the measurements
The Nominal Pipe Size (NPS) system standardises pipe dimensions so that pipes, fittings, valves, and accessories interoperate. Plumbers work with these nominal names every day, but DIYers can be tripped up if they try to match by a tape-measure alone.
How to Measure Pipe Correctly
-
Pipe size is identified by:
- The pipe’s Outside Diameter (OD).
- The fitting’s Inside Diameter (ID) (socket opening).
- Pipe Class / Schedule (e.g., Class 9, 12, 18 or Sch 40) relates to wall thickness and therefore the Internal Diameter (ID) and pressure rating.
- The outside diameter of a fitting is not useful (wall thickness varies by manufacturer).
Hose & Tube Dimensions
Common flexible hose sizes used in pool/spa systems (approximate IDs).
| Imperial Name | Metric Name | Inside Diameter (ID) |
|---|---|---|
| 3/8" | 9–10 mm | ~9 mm |
| 3/4" | 19 mm | ~19 mm |
BSP – British Standard Pipe Thread Sizes
BSP thread names are also nominal. The thread OD will not equal the nominal name.
| BSP Thread Size Naming | Outside Diameter (mm / inch) | TPI |
|---|---|---|
| 1/16" BSP | 7.7 mm / 0.304" | 28 |
| 1/8" BSP | 9.7 mm / 0.383" | 28 |
| 1/4" BSP | 13.16 mm / 0.518" | 19 |
| 3/8" BSP | 16.66 mm / 0.656" | 19 |
| 1/2" BSP / 15 mm | 20.99 mm / 0.825" | 14 |
| 5/8" BSP | 22.99 mm / 0.902" | 14 |
| 3/4" BSP / 20 mm | 26.44 mm / 1.041" | 14 |
| 7/8" BSP | 30.20 mm / 1.189" | 14 |
| 1" BSP / 25 mm | 33.25 mm / 1.309" | 11 |
| 1-1/4" BSP | 41.91 mm / 1.650" | 11 |
| 1-1/2" BSP / 40 mm | 47.80 mm / 1.882" | 11 |
| 2" BSP / 50 mm | 59.61 mm / 2.347" | 11 |
| 2-1/4" BSP | 65.71 mm / 2.587" | 11 |
| 2-1/2" BSP | 75.18 mm / 2.960" | 11 |
| 3" BSP | 87.88 mm / 3.460" | 11 |
| 4" BSP | 113.03 mm / 4.450" | 11 |
| 5" BSP | 138.43 mm / 5.450" | 11 |
| 6" BSP | 163.83 mm / 6.450" | 11 |
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