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Authorized Rinnai Dealer · Tankless Specialists · GTA & Durham
Tankless Water Heaters & Water Heater Replacement
Unlimited hot water, 20–35% lower gas consumption, and a 20+ year lifespan. We're an authorized Rinnai dealer — sizing, installing, and commissioning tankless water heaters correctly, with full 12-year heat exchanger warranty.
✓ TSSA Certified
✓ Authorized Lennox Dealer
✓ Authorized Rinnai Dealer
✓ Since 1995
Tankless Water Heaters — Why Rinnai, Why Now
A tankless water heater eliminates standby heat loss — the energy your tank spends keeping 40–60 gallons hot around the clock whether you're using it or not. That standby loss typically costs $100–$200/year in wasted gas. A properly sized Rinnai tankless unit heats water only when you need it, reducing gas consumption for water heating by 20–35% while providing unlimited supply.
Rinnai Models We Install
Rinnai RL Series
Non-Condensing · ~0.82–0.84 UEF
Reliable, proven performance at a lower initial cost. Non-condensing design — good choice for retrofits where condensate drainage is difficult.
Rinnai RU Series — Ultra High-Efficiency
Condensing · Up to 0.96 UEF
Extracts additional heat from exhaust gases. The right choice for households with high demand. Requires condensate drain and PVC venting.
Rinnai RUR — Instant Hot Water at Every Tap
Condensing + Recirculation
Built-in recirculation pump delivers instant hot water throughout the home. Eliminates waiting and water waste.
Tank vs. Tankless — Honest Comparison
| Feature | Tank (60 gal gas) | Rinnai Tankless |
|---|---|---|
| Hot water supply | Limited — can run out | Unlimited |
| Installed cost | $1,400–$2,200 | $3,200–$6,000 |
| Lifespan | 10–12 years | 20+ years |
| Operating cost | Baseline | 20–35% lower |
| Warranty | 1–6 yr typical | 12 yr heat exchanger |
Our Process
Gas supply verification
We check your meter and gas supply line capacity before specifying a unit — under-sized gas supply is the most common tankless failure.
Unit sizing
Based on your household's peak simultaneous demand and Ontario's 8–10°C winter groundwater temperature — not guessing.
Installation with TSSA permit
All gas appliance installations require TSSA permits. We handle the application and inspection.
Commissioning & warranty
Combustion analysis, hot water flow testing, and full Rinnai warranty registration.
Pricing & Financing
Rinnai tankless installation: $3,200–$6,000+ installed. No-money-down financing available OAC. Annual descaling: $199–$299 (recommended in Durham Region due to hard water).
Why Choose Malek
Expert Rinnai Service You Can Trust
Rinnai Technical Training
We hold Rinnai technical training — we diagnose error codes, size units correctly, and commission the system to manufacturer specification.
Gas Supply Expertise
We verify gas meter and supply line capacity before installation. Inadequate gas supply is the top cause of tankless performance problems.
Annual Descaling Service
Durham Region's hard water makes annual descaling essential. We offer descaling service and annual maintenance plans.
Full Error Code Diagnosis
When a Rinnai shows Error 11, 12, 25, 29 or others — we diagnose the root cause, not just reset the fault.
Related Services
Everything Under One Roof
Common Questions
Frequently Asked Questions
How much does Rinnai tankless installation cost?
$3,200–$6,000+ installed depending on the model, gas supply work needed, and venting configuration. We provide fully itemized quotes.
Will a tankless water heater run out of hot water?
No — as long as the unit is correctly sized for your household's peak simultaneous demand and gas supply is adequate, hot water supply is unlimited. We calculate peak demand before specifying any unit.
How often does a Rinnai need descaling?
In Durham Region's moderately hard water, annual descaling is recommended. Signs it's overdue: Error 29, reduced hot water flow, or it's been 12+ months since the last service.
What's the difference between condensing and non-condensing tankless?
Condensing units (RU Series) achieve up to 0.96 UEF by extracting heat from exhaust gases — require PVC venting and a condensate drain. Non-condensing units are simpler to install in some retrofits and use stainless steel venting.
Can you repair a Rinnai showing an error code?
Yes. Each Rinnai error code points to a specific fault. Error 11/12 = ignition/flame issues. Error 29 = scale buildup requiring descaling. Error 65 = water flow valve fault. We diagnose and resolve all codes.
Ready to Go Tankless with Rinnai?
Authorized Rinnai dealer — correct sizing, full 12-year warranty, expert installation. Serving the GTA & Durham since 1995.
Or call 416-881-2720 — Mon–Fri 8am–6pm, Sat 9am–4pm
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