Rinnai RHPN361S – Hydraheat Split 3.6kW

Product Details: Rinnai RHPN361S

Rinnai RHPN361S – Hydraheat Split 3.6kW, part of the Rinnai HydraHeat® Split Hot Water Heat Pump range. Ready for energy-efficient hot water? Discover HydraHeat – our premium split hot water heat pump system. Find an installer with ease. Genuine Rinnai New Zealand product, brand new, supplied through Rinnai NZ’s trade channel.

Rinnai RHPN361S — Specifications

Product Overview
Product	Hydraheat Split 3.6kW
Rinnai Part Number	RHPN361S
Product Range	Rinnai HydraHeat® Split Hot Water Heat Pump
Category	Hot Water Systems > Hot Water Heat Pump > Hydraheat
Brand	Rinnai
Technical Specifications
Model number / order code	RHPN361S
Cylinder compatibility criteria	The cylinder to which the HydraHeat Split is connected must meet all the following criteria. If you are unsure, an onsite inspection is recommended. Warranty does not cover connections to incompatible cylinders.; Single element¹ mains pressure cylinder – eight years old or less, 180-340 L, element size 3 kW or less; A cylinder not connected to supplementary heating (e.g. wetback, solar thermal etc); A cylinder with a suitable TPR (rated 10 kW or more); Pipe run length is less than 20 m (supplied cable is 15 m, extension cable is 5 m); Difference in height between base of cylinder and base of h
Coefficient of performance (COP)	4.6; (inlet water temp 19 ºC, outlet water temp. 55 ºC, ambient temp. 19 ºC); Accredited Testing to AS/NZS 5125 by NATA accredited Provider
Scope of use	The Rinnai HydraHeat® Split External Unit is designed for outdoor installations.; Retrofit or new build residential applications.; Connection to a compatible indoor/outdoor cylinder.; 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, refer water quality parameters in the support material (downloads).; *Refer installation guide within the downloads tab for further details.
Outlet water temperature	Standard: 60 °C, Eco 55 °C
Storage capacity	Will be based on the cylinder it is connected to
Maximum valve pressure settings	TPR (required): Refer manutacturer’s specification; Cold water expansion valve: 700 kPa (must be installed); Pressure limiting valve: 500 kPa
Rated heat pump input/output	765 W / 3600 W
Hot water recovery rate	86 L/h; Recovery rate is calculated at Eco 55 mode, 19 ºC ambient temp., 36 ºC rise.
Max. current (heat pump standard mode)	4.6 A
Max. current heat pump (element only)	14.5 A
Backup resistance element rating capacity	3000 W
Min. inlet water pressure	100 kPa
IP rating	IP24
Water port connections	G½ ” (15 mm x 2)
Sound pressure level at 1 m	48 dB(A); Sound pressure measured at 1m distance from water heater in free field. Appliance operated in standard mode (60 °C) at an ambient temperature of  19 °C
Power supply	230-240 V 50 Hz
Dimensions	Height: 750 mm; Width: 835 mm; Depth: 365 mm
Weights	Net: 42.5 kg, Gross: 50 kg
Data label position	Behind front cover, positioned on panel between compressor and fan
Refrigeration type	R-290 / 150 g
Accessory – touch up paint	R1886: Touch up paint cod grey – 400 ml aerosol can
Accessory – 5 m extension cable	R1012: HydraHeat Split extension cable 5 m; The supplied cable for the cylinder connection is 15 m. If the distance between the heat pump unit and cylinder is longer than 15 m, a 5 m extension cable is available.
Accessory – mounting feet	R4314: Heat pump mounting feet (off white).; Plastic mounting feet with horizontal grooves that allow fixing in any position. Comes with screw packs to allow the feet to be secured to the ground. Maximum weight 140 kg.
Market release	April 2025

Documents & Downloads

• 📄 HydraHeat Split Brochure
• 📄 HydraHeat Split operation guide
• 📄 HydraHeat Split installation guide
• 📄 HydraHeat Split quick start install guide
• 📄 HydraHeat Split Supplier Declaration of Conformity (SDoC)
• 📄 Certificate of Compliance for NSF/ANSI 372-2022 Standard (Drinking Water System Components Lead Content)
• 📄 HydraHeat Split warranty

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