Five reasons to choose Gree Heat Pump Hot Water in Christchurch

Gree is the world’s largest heat pump manufacturer, and their WHIO Inverter series brings high-end "Inverter" technology to the hot water space—a feature usually reserved for premium air conditioning. I like this model so much, I’ve installed one at my place.

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1. Variable Speed Inverter Technology
Unlike standard "on/off" heat pumps, the Gree WHIO features a DC Inverter compressor. It varies its speed based on demand, leading to a class-leading COP of 5.4. It is smoother, uses less energy, and is exceptionally quiet.

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2. The "Sunflower" AI Mode
The unit uses self-learning algorithms to track when the ambient air is at its warmest during the day. In Sunflower Mode, it prioritises heating during these windows, potentially saving an additional 10% in energy.

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3. High-Temperature Sterilisation (70°C)
Using eco-friendly R290 refrigerant, the WHIO can heat water up to 70°C. This ensures total bacteria (Legionella) protection and means you have "more" hot water available at the tap because you’ll be mixing in more cold.

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4. Whisper-Quiet Operation
Thanks to the inverter compressor and high-quality fan design, the Gree is one of the quietest units on the market. It’s the ideal choice for homeowners with tight boundary clearances or installations near bedroom windows.

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5. Crystal Titanium Enamel Tank
The inner tank features a 3-layer composite enamel that has undergone over 1,000 hours of acid-resistance testing. This makes it highly durable against the varied water chemistry found across New Zealand.

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Tim’s Installation Reality Check: WiFi Connectivity The WHIO is highly tech-forward. To get the most out of the Gree+ App, we need to ensure your home WiFi reaches the installation site. If the signal is weak outside, a simple WiFi extender might be needed to enjoy full remote control.

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Capacity       Suitable Household Size
200L               2 to 4 people
270L               3 to 5 people

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Tim’s Sizing Note: The Tech-Savvy Pick
Gree uses an "80L per person" rule for sizing. The 200L is great for a small home, but for a family home, the 270L is essential. Because it can heat up to 70°C, a 270L Gree actually "acts" like a much larger tank because you use less of it per shower.

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Warranty Information (Domestic Use)
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Gree provides arguably the most comprehensive warranty in New Zealand:
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Complete Unit
7 Years
Parts & Labour (Comprehensive)

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