Calitec NZ KP-50 Refrigerant Split System 300L Outdoor Cylinder

- 4.3
- COP
- 300 L
- Tank
- 9.1c
- Running Cost/kWh
- Max 56 dB(A)
- Noise
- R32
- Refrigerant
- —
- Installed from
Who is it a good fit for?
- Homes where the cylinder needs to be far from the heat pump — up to 20m refrigerant pipe run gives real flexibility on cylinder placement.
- Homes with a wood fire or wet-back system — the 300L + Wetback and 400L variants can accept input from solid fuel heating, reducing reliance on the heat pump in winter.
- Large households needing high-volume storage — the 400L variant is the largest tank in our database alongside the Rheem range.
- Those wanting central heating integration — the 400L + Hydronic coil can feed underfloor or radiator circuits.
- Solar PV owners — Wi-Fi and solar inverter input on all variants.
Review
Performance & efficiency:
Calitec designs it’s own product range for New Zealand’s unique challenges and offers the longest warranties available on the New Zealand market to reflect their confidence in the quality and durability of their products. COP of 4.0 at 15°C is honestly rated for North Island conditions and competitive for a split system using R32. The 20-year tank warranty matches the WH-70 and remains the strongest in the NZ market.
Features:
The Calitec KP-50 range offers the most configuration flexibility of any heat pump water heater in our database.
- The base system: is a refrigerant-cycling split: the outdoor unit contains the heat pump and the heat exchanger coil is built directly into the Calitec cylinder, eliminating the need for a water-to-refrigerant heat exchanger.
- Cylinder placement & pipe run: The cylinder can be placed indoors or outdoors (up to 20m pipe run), and the 300L Outdoor variant allows both units fully outside — useful when internal space is limited.
- Wetback: The 300L + Wetback and 400L + Wetback & Hydronic variants accept input from a wood fire or wet-back system, making this the only NZ heat pump water heater that can integrate with both solar PV and solid fuel heating.
Supply & service support:
Calitec is a locally owned, Whangarei-based, and NZ-focused hot water heat pump product designer and supplier, distributing nationwide with free delivery across the North Island and depot pickup available for the South Island and rural customers.
Installation runs through Calitec's own network of experienced installers, or choose your own licensed plumber. Products are backed by a 5-year warranty on the mono block unit and a standout 20-year warranty on Calitec cylinders, with ongoing support via phone, email and online technical resources.
Specs
Calitec NZ KP-50 Refrigerant Split System 300L Outdoor CylinderCost & efficiency
- Typical installed price
- —
- COP (rated)
- 4.3
- Test conditions
- @ 19°C ambient
- Test standard
- Not provided
- Eff. cost/kWh
- 9.1c
- Input power
- 1 kW
- Heating capacity
- 4 kW
- Household size
- 4–5 people
Hot water performance
- Tank size
- 300 L
- Max temperature
- 60 °C
- Hot water output
- ~540L @ 40°C (3-6 person households)
- Recovery rate
- 4.25 hours (300L tank, ambient ≥15°C, inlet ≥15°C, outlet 60°C)
- Max water pressure
- 700
- Tank material
- Duplex 2205 stainless steel (1mm thickness)
- Tank insulation
- Polyurethane (75mm)
- Backup element
- 3 kW
Installation & dimensions
- System type
- Split unit
- Indoor / outdoor
- Split — outdoor heat pump + indoor/outdoor tank
- Min clearance / space
- See installation manual
- Min space required
- See installation manual; max 20 m piping
- Dimensions (H×W×D mm)
- Unit 900×315×545 mm; Tank 1600ר650mm
- Unit weight (empty)
- Unit: 37 kg; Tank: 70 kg
Climate & environment
- Refrigerant
- R32 (GWP 675)
- Operating range
- -10 °C to 43 °C
- Noise
- Max 56 dB(A)
- Heating capacity
- 4 kW
Controls & features
- Display type
- LCD with weatherproof cover or wired (indoor)
- Control modes
- Programmable Timer, Set and Forget, Child Lock
- Smart / Wi-Fi
- Yes
- Solar PV ready
- Yes
Warranty & support
- Tank warranty
- 20 years
- Parts & labour warranty
- 5 years parts and labour
- Installer restriction
- Licensed plumber and heat pump installer
- Supplier / brand
- Calitec NZ