Any Home. Any Season. One System.
Upgrade to a high-efficiency heat pump to heat and cool with one system, reduce energy costs, and get up to $7,500 in rebates.
Rinnai REHP Series™: The Ultimate Hybrid Electric Heat Pump Water Heater
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Experience up to 400% efficiency and zero-emission hot water with Rinnai’s heavy-duty sustainable solution.
The Rinnai REHP Series combines advanced heat pump technology with electric backup to deliver reliable, energy-efficient hot water. By extracting heat from the surrounding air, it reduces energy bills while operating with a whisper-quiet variable-speed fan for consistent, high-performance comfort.
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The Best Choice for "No-Gas" Homes
If your home doesn't have a gas line, the Rinnai REHP is the single best upgrade you can make.
- 4x More Efficient: Standard electric tanks are 100% efficient at best; the Rinnai REHP is up to 400% efficient because it moves heat rather than just creating it.
- Rapid Recovery: In "No-Gas" situations, standard electric tanks often run out of hot water. The REHP uses a 4.5 kW heavy-duty element paired with heat pump technology to deliver a First Hour Rating of up to 91 Gallons.
- Zero Emissions: Leveraging Ontario's clean electrical grid, this unit offers a fossil-fuel-free home without sacrificing the high-flow performance usually only found in gas systems.
Rinnai Electric Heat Pump (REHP) Brochure
The 4Most Energy Edge
Why choose 4Most Energy for your Heat Pump installation in Ontario?
Transitioning to heat pump technology requires more than just a standard swap; it requires expert knowledge of airflow, ambient temperature requirements, and proper ducting—especially in Ontario's climate.
- Heavy-Duty Build Quality: Unlike standard residential units, Rinnai is engineered for durability. From the glass-lined tank to the premium anode rod, this system is built to handle the rigours of Canadian water conditions.
- Precision Sizing & Airflow Analysis: We ensure your basement or utility room has the required 700 ft3 of space or design custom ducting solutions to maintain peak efficiency year-round.
- Rebate Maximization: As Energy Star® and NEEA Tier 4 certified units, we help you navigate current Ontario energy rebates to lower your upfront costs.
- Redundancy Guarantee: We configure your backup 4.5 kW elements to ensure you never run out of hot water, even during peak demand or extreme cold snaps.
Warranty Highlight
- Tank: 10 Years
- Parts: 10 Years
- 4Most Professional Labor: 1 Year
Peace of mind comes standard. We use only genuine Rinnai parts for all maintenance and repairs.
Rinnai REHP Series Specifications
Detailed technical specifications for Rinnai Hybrid Heat Pump Water Heaters.
Note: Performance values are based on standard testing conditions.
| Feature | REHP50C (50 Gal) | REHP65C (65 Gal) | REHP80C (80 Gal) |
|---|---|---|---|
| Nominal Capacity | 189 L (50 Gal) | 246 L (65 Gal) | 303 L (80 Gal) |
| UEF (Efficiency) | 3.75 | 3.90 | 4.00 |
| First Hour Rating | 73 GPH | 80 GPH | 91 GPH |
| Voltage | 208/240V | 208/240V | 208/240V |
| Breaker Size | 30 Amps | 30 Amps | 30 Amps |
| Height | 66.4" (1687mm) | 65.5" (1663mm) | 74.2" (1885mm) |
| Refrigerant | R134a | R134a | R134a |
- Unmatched Efficiency: Up to 4.0 UEF—meaning for every $1 of electricity put in, you get up to $4 of heat out.
- 5 Operating Modes:
- Economy (Default): Maximum savings using heat pump priority.
- Hybrid: Balanced performance for busy mornings.
- Heat Pump: 100% green, zero-element usage.
- E-Heater: High-recovery electric mode.
- Vacation: Protects your home and saves money while you're away.
- Whisper-Quiet Operation: Variable speed fan minimizes noise, making it suitable for indoor installations.
Smart Grid Ready: CTA-2045 (AC) Certified for future-proof demand-response integration.
Which Model is Right for You?
- REHP50C: Ideal for households of 2–3 people with standard hot water usage.
- REHP65C: Our newest and most popular model; perfect for families of 3–5 with multiple showers and laundry.
- REHP80C: The powerhouse for large families (5+) or homes with high-flow fixtures like soaking tubs.
- Site Assessment: We verify air volume and drainage (condensate) requirements.
- Removal: Safe disposal of your old, inefficient tank.
- Optimization: Installation of the REHP unit with optional ducting kits if space is confined (<450 ft3).
- Commissioning: We set your default temperature (140° F per Canadian standards) and walk you through the intuitive LED interface.
- Post-Install Support: We provide a maintenance record book to track your annual anode rod and air filter checks.
Frequently Asked Questions Rinnai REHP Series
Are there any rebates available for this unit in Ontario?
Yes, there is a rebate available. However, since energy rebates in Ontario can change every month based on government and utility provider updates, we recommend contacting our experts directly. We will provide you with the most recent updates and ensure you maximize your savings through programs like the Home Renovation Savings Program.
Does it work in cold Ontario winters?
A: Since this unit is designed for indoor installation (like a basement or utility room), it pulls heat from your indoor air. The heat pump operates efficiently as long as the ambient room temperature is at least 37° F(3°C ). If the room temperature drops below that, the high-performance 4.5 kW electric elements automatically take over to ensure you always have hot water.
How does the Rinnai REHP compare to the Rheem ProTerra (PROPH50) hybrid heater?
While both are efficient, the Rinnai REHP is the superior choice for Ontario homeowners for several strategic reasons:
- Heavy-Duty Engineering: Rinnai is built with a more robust chassis and higher-grade internal components compared to the lighter Rheem model, which can feel less durable under heavy usage.
- Better Parts Availability: Rinnai has a significantly stronger logistics network in Canada. If you ever need a component, Rinnai parts are readily available, whereas Rheem parts often face longer backorder times.
- Competitive Pricing: Despite its "heavy-duty" classification, the Rinnai REHP often offers a more competitive price point for the value.
- Operating Range: Rinnai's heat pump is designed to operate efficiently down to 37° F , ensuring more "heat pump days" in Canadian climates.
Maintenance Design: Rinnai features horizontal air filter placement for quick, tool-free cleaning.
How much can I save on my bills?
Most Ontario homeowners switching from a standard electric water heater save between $300–$500 annually on electricity, depending on usage patterns.
Do I need a floor drain?
Yes. Like an air conditioner, heat pumps produce condensate. We install a flexible drainage pipe to your nearest floor drain or can install a condensate pump if a drain isn't nearby.
Service Area
Greater Toronto Area (GTA) and surrounding regions
Toronto, Markham, Richmond Hill, Vaughan, Aurora, Newmarket, Scarborough, Brampton, and Mississauga.
Extended Service Area: Stouffville, Oshawa, Barrie, Orangeville, Hamilton, St. Catharines, Guelph, Kitchener.
