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Rinnai Enviroflo™ S Split Hot Water Heat Pump

High-efficiency hot water heat pump for kiwi homes and light commercial

The Rinnai Enviroflo S Split Hot Water Heat Pump offers efficient and reliable hot water solutions for Kiwi homes and light commercial installations. Available in 250L, 315L and 400L capacities, it caters to various hot water demands. With a powerful 7.0kW heat pump, it ensures consistent hot water supply even during peak usage or colder weather conditions.

Utilising advanced heat pump technology, the Enviroflo S delivers high energy efficiency, reducing electricity consumption and lowering energy bills. Designed for residential and light commercial applications, the system operates quietly, ensuring minimal noise disruption. Built to withstand New Zealand’s climate conditions, the Enviroflo S Split Hot Water Heat Pump is constructed with high-quality materials to ensure long-lasting performance.

Product Details

The split system design separates the heat pump from the storage tank, allowing for flexible installation options, accommodating various site requirements and configurations, and simplifies maintenance. The system uses R290, a sustainable refrigerant, with low GWP (Global Warming Potential) aligning with environmental standards and reducing greenhouse gas emissions.

Capable of handling water pressures up to 1000kPa, it ensures robust performance across different water supply systems.

The Enviroflo S Split Hot Water Heat Pump is an ideal choice for homeowners and light commercial businesses seeking a reliable, energy-efficient, and environmentally sustainable hot water solution.

Design & Installation

Multiple Capacities

Cylinders available in 250L, 315L and 400L capacities to suit your hot water needs.

Quiet Operation

Operates quietly down to a low 45dB(A), quieter than the average noise level of a household dishwasher.

Performance & Efficiency

Energy Efficient

Uses less energy to heat your water than a standard electric storage tank.

Versatile

Multiple operating modes (Standard/ECO/Hybrid/Electric/Vacation).

Reliable

Inbuilt electric boost element to ensure you always have a reliable supply of hot water.

Off-Peak Compatible

Option to run only at off-peak times, when the electricity cost is lower.

Sustainability

Environmentally Sustainable

High efficiency R290 refrigerant with a low GWP of just 3.

PV Compatible

Can be networked with solar PV for enhanced efficiency and savings.

Technology & Control

Built in Wi-Fi

The built in Wi-Fi module allows for convenient control from anywhere.

Automated

Auto restart function means in the event of a power outage it will automatically restart once the power is re-instated.

Auto Disinfection

Auto disinfection preventing the potential growth of legionella.

Climate Readiness

Adaptable for All Climates

Operates in ambient air conditions ranging from -10°C to 45°C.

Defrost Control

Built-in anti-frost function to protect the evaporator in colder climates.

Technical Specifications

System/order codes

  • KSHP250M24L70 – 250L tank
  • KSHP315M24L70 – 315L tank
  • KSHP400M24L70 – 400L tank

Coefficient of performance (COP)

4.37 (19°C ambient, 19°C inlet water, 55°C outlet water)

Recovery rate (estimated)

118 L/hr (19°C ambient, 19°C inlet water, 55°C outlet water)

Rated heat pump input/output

1.22 kW / 5.35 kW (at 19°C ambient, 19°C inlet water, 55°C outlet water)

Refrigerant

R290 / 510g
Refrigerant circuit maximum pressure 3200 kPa

Ambient operating range

-10 to 45°C

Suitability

Not suitable as a spa or swimming pool heater.
Not suitable for hydronic or for in-series installation in ring main* systems.

Hard and acidic water will need to be treated to use this product.

*For ring main installations please contact our Commercial Team.

Heating capacity

7.0 kW (at 32.6°C ambient, 21.1°C inlet water)

Maximum pipe run

Maximum pipe length between tank and heat pump = 10m

Colours

  • Tank colour – dune
  • Heat pump – cool grey 1C

Sound pressure level at 1.5m

42-52 dB(A)
Sound levels on installations can be higher due to noise reflections from nearby surfaces and structures.

Power supply

220V-240V AC 50 Hz, maximum current 11.5 A (15 A rating power supply)

IP rating

IPX4 (tank and heat pump)

Heat pump dimensions (mm)

  • Height – 690
  • Width – 1047
  • Depth – 375

Heat pump weight

66 kg

Tank specification summary

Element 2.4 kW
Construction Vitreous enamel lined
TPR valve 1000 kPa
Max. supply pressure 850 kPa
Max. inlet pressure (with ECV) 680 kPa
Max. inlet pressure (without ECV) 800 kPa
PLV without ECV 500 kPa
Minimum inlet water pressure 100 kPa
Water connections RP ¾” (20 mm)
Max. thermostat setting 70°C
Weights empty/full 66 / 341 kg, 77 / 413 kg, 90 / 514 kg

Data label positions

  • Tank, midway, next to element cover
  • Heat pump, right hand side underneath controller

Market release

September 2026

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