Description
The Rinnai Enviroflo GR Series 300L represents the pinnacle of heat pump hot water technology. This system combines maximum storage capacity with next-generation efficiency, using advanced R290 refrigerant to extract warmth from surrounding air and deliver consistent, affordable hot water.
With 300 litres of storage, the GR Series 300L suits large households, multiple-bathroom properties and small commercial applications. The intelligent heat pump activates when needed, storing heated water for reliable access throughout the day and night. You’ll experience both exceptional comfort and substantial energy savings.
Installation flexibility is built-in. The Enviroflo GR Series 300L works indoors or outdoors—though indoor installations require adequate airflow for optimal performance. Penrith Hot Water assesses your property across Penrith, Emu Plains, Kingswood, Glenmore Park, Cranebrook and the Greater Nepean to determine ideal placement and ensure maximum efficiency.
WHY CHOOSE THIS PRODUCT?
- Maximum capacity: 300L perfect for large families and commercial use
- Advanced heat pump technology: R290 refrigerant maximises efficiency
- Exceptional energy savings: Air source extraction dramatically reduces bills
- Flexible installation: Indoor or outdoor options available
- Extended cylinder warranty: 7-year parts protection
- Comprehensive refrigeration warranty: 5-year parts and labour coverage
- Government rebates: STCs reduce your upfront investment
- Environmentally-friendly: R290 refrigerant supports sustainability
- Professional installation: Penrith Hot Water ensures optimal system setup
PRODUCT DETAILS
Model Number: EHPG300VM
System Type: Heat pump hot water heater
Storage Capacity: 300 litres
Installation: Indoor or outdoor (indoor requires minimum airflow)
The Enviroflo GR Series 300L leverages advanced R290 refrigerant technology combined with maximum storage capacity. This next-generation solution improves heat transfer whilst supporting environmental responsibility—ideal for Greater Nepean properties prioritising both premium performance and sustainability.
TECHNICAL SPECIFICATIONS
Type: Heat Pump Hot Water Heater
Model: EHPG300VM
Storage Capacity: 300 litres
Refrigerant: R290
Installation Options: Indoor (with airflow requirements) or outdoor
Power Source: Electric (air source heat pump)
The GR Series 300L draws warmth from ambient air year-round, concentrating it into your storage cylinder. R290 refrigerant delivers superior efficiency compared to earlier models, translating to measurable reductions in energy consumption across Penrith, Emu Plains, Kingswood, Glenmore Park, Cranebrook and the Greater Nepean.
DIMENSIONS
Height: 2055 mm
Width: 652 mm
The Enviroflo’s tall vertical design maximises storage capacity whilst maintaining a compact footprint. Whether you install outdoors or indoors (with proper ventilation), this design minimises disruption across your Greater Nepean location.
WARRANTY INFORMATION
Warranty conditions apply. Please review full terms before purchase.
Storage Cylinder (Inner Storage Tank): 7-year parts warranty, 3-year labour warranty
Refrigeration Components: 5-year parts and labour warranty
Other Components: 1-year parts and labour warranty
Rinnai’s tiered warranty reflects absolute confidence in the GR Series 300L durability. Your storage cylinder receives industry-leading seven-year parts protection and three-year labour coverage. Refrigeration components enjoy five years of comprehensive protection, whilst other parts carry one-year coverage. This structured approach ensures long-term reliability and peace of mind.
STC INFORMATION
All supply and installation prices include STCs assigned to us as a point-of-sale discount.
All supply only prices require the customer to claim the STCs themselves.
What Are STCs?
Small-scale Technology Certificates (STCs) are Australian government rebates on eligible hot water systems. The Rinnai Enviroflo 300L GR Series qualifies, reducing your overall cost.
Your Options
Supply and Installation: STCs are applied at checkout—no paperwork needed.
Supply Only: You’ll claim the STCs yourself. We’ll provide the documentation.
For current rebate amounts on the Rinnai Enviroflo 300L GR Series, contact Penrith Hot Water for a free quote.
DELIVERY INFORMATION
We offer free delivery to the following regions:
- Penrith
- Emu Plains
- Kingswood
- Glenmore Park
- Cranebrook
- Surrounding suburbs in the Greater Nepean
Important: All deliveries must be within 50 km of a town with a population over 30,000.
If you’re located outside these areas, please phone us to check availability and discuss delivery options. Note that purchases outside our standard delivery zones will be refunded if free delivery cannot be provided.
DOWNLOADS
Rinnai Enviroflo AR & GR Series heat pump brochure
READY TO UPGRADE SECTION
Ready for maximum-capacity premium heat pump hot water?
The Rinnai Enviroflo 300L GR Series delivers superior performance and savings for large households and commercial applications. From Penrith to Emu Plains, Kingswood, Glenmore Park, Cranebrook and across the Greater Nepean, Penrith Hot Water makes upgrading straightforward.
Contact us today for a free site assessment and custom quote. Our team will evaluate your property, discuss airflow requirements for indoor installation, explain STC savings, and schedule professional installation.
Phone Penrith Hot Water now or request an online quote. Premium maximum-capacity heat pump hot water starts here.



