16kW Rheem (Raypak) Pool & Spa Heat Pump - Compact Inverter Series (RPH016-1A)
16kW Rheem (Raypak) Pool & Spa Heat Pump - Compact Inverter Series (RPH016-1A) is temporarily out of stock and will ship as soon as it's available.
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16kW Rheem (Raypak) Pool & Spa Heat Pump - Compact Inverter Ser...
16kW Rheem (Raypak) Pool & Spa Heat Pump - Compact Inverter Series (RPH016-1A) is temporarily out of stock and will ship as soon as it's available.
16kW Rheem (Raypak) Pool & Spa Heat Pump - Compact Inverter Series (RPH016-1A)
The Rheem RPH016-1A 16kW is the mid-size workhorse in Rheem's Compact Residential Inverter range — designed for medium-sized in-ground pools where strong heating output is needed without stepping up to three-phase power. Backed by Rheem's national service network and one of the strongest warranties available.
- Physically Stocked, unlike most "drop-shipping" websites.
- Shipped from VIC, NSW, WA, QLD
Rheem is one of Australia's most recognised names in water heating, and Rheem Thermal is a long-established specialist in pool and spa heating for residential and commercial applications. The Compact Residential Inverter Series combines modern inverter efficiency, quiet operation, WiFi control, strong build quality, and one of the best warranty structures in the market.
At a Glance — 16kW (RPH016-1A)
- Heating capacity: 15.5 kW (at 27°C air / 27°C water)
- Average COP at 50% speed: 9.6
- Power supply: 240V single phase
- Recommended circuit breaker: 20A
- Sound level at 10m: 21.2-34.4 dB(A)
- Operating air range: -5°C to +43°C
- Refrigerant: R32 (0.8 kg)
- Advised water flow: 1.7-2.3 L/sec
- Dimensions (L × W × H): 890 × 430 × 657 mm
- Net weight: 64 kg
- Water connections: 50mm
Best suited to medium-sized in-ground pools. For smaller pools or spas, see the 9kW or 13kW models. For larger pools, see the 21kW or 28kW models in the same series.
Why We Like Rheem Heat Pumps
- Excellent national backup support from a brand Australians already know and trust
- Heating and cooling capability for better year-round pool and spa comfort
- Built-in WiFi control via app connectivity
- Compact footprint for installations where space matters
- Quiet inverter operation with advanced EC fan motor technology
- High temperature settings for spa applications
- Ready integration with pool automation systems
Warranty Support That Actually Means Something
Not all warranties are equal. Rheem backs the Compact Series with its National Service Network, which is a major advantage over many lesser-known import brands.
- 3 year parts and labour warranty
- 5 years on general parts
- 10 years on the compressor
- 25 years on the heat exchanger
One standout warranty feature: if the heat exchanger fails within the 3 year comprehensive warranty period, Rheem states they will replace the heater at no cost. That is a serious level of support and one of the strongest warranty offers available in this category.
Key Features (All Models)
- Twin rotary stepless DC inverter compressor for efficient, precise output control
- EC fan motor for quiet operation and improved efficiency
- Electronic Expansion Valve (EEV) for increased temperature stability
- Twisted titanium heat exchanger for effective heat transfer and corrosion resistance
- Advanced reverse cycle defrosting for improved cold-weather operation
- R32 refrigerant with lower global warming impact than older refrigerants
- Durable ABS and aluminium alloy casing for outdoor durability
- Single point condensate drain with factory supplied drain kit
- Heavy duty weather cover to help keep the unit clean when not in use
- 50mm water connections
Control and Automation
- Easy-use LCD touchscreen with lock function
- WiFi enabled for remote control through a compatible app
- Suitable for spa temperature settings
- Can integrate with automation systems
- Easy connection to the Rheem DPi Link for automated pump control
Australian Compliance and Peace of Mind
These units are independently certified in Australia to comply with Australian Electrical Safety Standards.
- Certified to AS/NZS 60335-1
- Certified to AS/NZS 60335-2-40
Why Buy From Us
- Authorised Australian supplier
- Real-world product knowledge in pool and spa heating
Full Range Comparison — Rheem Compact Residential Inverter Series
| Model | RPH009-1A | RPH013-1A | RPH016-1A | RPH021-1A | RPH028-1A | RPH028-3A | RPH035-3A |
|---|---|---|---|---|---|---|---|
| Heating Capacity at Air 27°C / Water 27°C / Humidity 80% | |||||||
| Heating Capacity (kW) | 8.6 | 13 | 15.5 | 21 | 27.8 | 27.8 | 35.0 |
| COP Range | 14-6.5 | 14-6.4 | 15-6.5 | 15-6.5 | 15.8-7.2 | 15.6-7.1 | 15.3-7.0 |
| Average COP at 50% Speed | 9.0 | 9.5 | 9.6 | 9.3 | 11.0 | 10.7 | 10.6 |
| Heating Capacity at Air 15°C / Water 26°C / Humidity 70% | |||||||
| Heating Capacity (kW) | 6.4 | 9.0 | 10.9 | 14.5 | 18.8 | 18.8 | 24 |
| Cooling at Air 35°C / Water 28°C / Humidity 80% | |||||||
| Cooling Capacity (kW) | 4.4 | 5.9 | 7.8 | 9.9 | 11.7 | 11.7 | 16.0 |
| Technical Specifications | |||||||
| Operating air temp (°C) | -5 to 43 | -10 to 43 | |||||
| Power supply | 240V 1Ph | 415V 3Ph | |||||
| Circuit breaker (A) | 10 | 16 | 20 | 25 | 25 | 10 | 20 |
| Sound at 10m dB(A) | 19.0-28.4 | 22.2-30.8 | 21.2-34.4 | 23.4-34.1 | 21.5-32.9 | 21.5-32.9 | 21.5-32.9 |
| R32 Refrigerant (kg) | 0.5 | 0.75 | 0.8 | 1.0 | 2.0 | 2.0 | 2.0 |
| Water flow (L/sec) | 0.5-1.2 | 1.2-1.7 | 1.7-2.3 | 2.0-2.8 | 2.8-3.4 | 2.8-3.4 | 3.3-5.0 |
| Dimensions L/W/H (mm) | 890/430/657 | 890/430/657 | 890/430/657 | 1060/430/657 | 1060/430/957 | 1060/430/957 | 1314/512/957 |
| Net weight (kg) | 58 | 61 | 64 | 70 | 94 | 99 | 132 |
| Water connection (mm) | 50 | ||||||
| Protection | IPX4 | ||||||
Performance varies with installation, flow rate, ambient temperature and humidity. Specifications may change without notice.
For a side-by-side overview of every size in this range (9kW through 35kW), see the Rheem Compact Inverter Series — Range Overview.
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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RPH016-1A