1. Water Heaters New/Used Products
  2. sku: 8039023775755633
  3. RINNAI SIG605

RINNAI SIG605 Ignitor Tankless RL75I RL94I

Sig605 Rinnai Fits Ignitor Replacement Rl75i And Rl94i Tankless

( Brand: Rinnai ), ( Manufacturer Part Number: SIG605 ), ( Part Type: Ignitor )

Review RINNAI Fits Ignitor Replacement And Tankless

The Rinnai SIG605 Tankless Water Heater is a high-performance, efficient solution for providing continuous hot water for your home or business. This model is part of Rinnai's RL Series, which includes the RL75i and RL94i versions, all sharing the same advanced features.

The SIG605 is a condensing, direct-vent, natural gas or propane tankless water heater, capable of delivering a maximum flow rate of 6.6 gallons per minute (GPM) at a 35 F temperature rise. It comes with an electronic ignition system (Ignitor RL), which ensures reliable ignition and precise temperature control.

This tankless heater features a digital controller with an easy-to-use, intuitive interface that allows you to adjust the temperature in increments as small as 1 F. The controller also includes diagnostic capabilities, helping you identify any potential issues quickly.

The SIG605 is designed for both indoor and outdoor installation, with a compact footprint that allows for flexibility in installation locations. The heater's dimensions are approximately 23.6 inches (H) x 13.5 inches (W) x 7.5 inches (D), making it a suitable choice for spaces with limited available area.

The unit is constructed with a corrosion-resistant copper heat exchanger, ensuring long-lasting, reliable performance. The SIG605 also features a built-in recirculation system, which helps reduce hot water wait times and conserves water by keeping water in the supply line warm.

Rinnai's Condensing Technology extracts more usable heat from the exhaust gases, resulting in increased efficiency and lower energy consumption. The SIG605 has an energy factor of 0.82, making it an energy-efficient choice for your hot water needs.

The unit's direct-vent system allows for both horizontal and vertical flue installations, with flexible venting options up to 15 feet in length and inches in diameter. The SIG605 also features a condensate drain connection, which allows for easy connection to a drain or condensate neutralizer.

Additionally, the SIG605 comes with a 12-year limited warranty on the heat exchanger and a 5-year limited warranty on parts. With proper installation and maintenance, this tankless water heater is designed to provide you with dependable, hot water for years to come.

Rinnia Sig605, RL75i, and RL94i Tankless Water Heaters: A Comparative Analysis

The Rinnia Sig605, RL75i, and RL94i are high-performing tankless water heaters from the renowned brand, Rinnia. In this analysis, we will discuss the key features, pros, cons, and a concluding recommendation for each model.

1. Rinnia Sig605: Features:

- Condensing tankless water heater

- Energy Star certified

- 6.6 GPM (gallons per minute) continuous flow rate

- Direct vent and non-condensing venting options

Pros:

- High efficiency with an Energy Factor of 0.95

- Compact design for easy installation

- Can be used for both residential and light commercial applications

Cons:

- Lower flow rate compared to RL75i and RL94i

- Requires a dedicated electrical circuit

- Condensing technology may require additional maintenance

2. Rinnia RL75i: Features:

- Non-condensing tankless water heater

- Energy Star certified

- 7.5 GPM continuous flow rate

- Direct vent and power venting options

Pros:

- Higher flow rate than Sig605

- Flexible venting options

- Energy-efficient with an Energy Factor of 0.82

Cons:

- Larger size than Sig605

- Requires a dedicated circulating pump for optimal performance

- May not be suitable for extremely cold climates

3. Rinnia RL94i: Features:

- Condensing tankless water heater

- Energy Star certified

- 9.4 GPM continuous flow rate

- Direct vent and power venting options

Pros:

- Highest flow rate among the three models

- High efficiency with an Energy Factor of 0.95

- Can be used for residential and commercial applications

Cons:

- Larger size than Sig605 and RL75i

- Requires a dedicated circulating pump and condensate drain

- Higher installation cost due to larger size and additional components

Conclusion: When choosing between the Rinnia Sig605, RL75i, and RL94i, consider the following factors:

- Flow rate requirements: Determine the hot water demand in your household or commercial application.

- Space availability: Consider the size and venting requirements of each model.

- Budget: Compare the installation and operating costs of each model.

Based on the analysis, the Rinnia RL94i is the most powerful and energy-efficient model, making it suitable for larger homes or commercial applications. The Rinnia Sig605 is an excellent choice for smaller homes or applications with lower hot water demand. The Rinnia RL75i offers a good balance between flow rate and efficiency, making it a suitable option for medium-sized homes.

Recommendation:

Consider your hot water demand, space availability, and budget when selecting the Rinnia tankless water heater that best suits your needs. If you require a high flow rate and energy efficiency, the Rinnia RL94i is the recommended choice. For smaller applications with lower hot water demand, the Rinnia Sig605 is a cost-effective and efficient option. The Rinnia RL75i offers a good balance between flow rate and efficiency, making it a suitable choice for medium-sized applications.

Details:

Ignitor Replacement Compatible with Rinnai SIG605, Fits RL75i RL94i Tankless Water Heater model's.

part #: sig605 prices

  • $49.00-$96.99

specifications wateheat:

  • brand: Rinnai
  • mpn: Sig605
  • part type: Ignitor

payments wateheat:

  • credit card: Diners-club
  • wallet: Google-pay
  • other

shipping wateheat:

  • cost: $0.00
  • transit: 3-9 Days
  • carrier: UPS, FedEx
  • class: Standard, Expedited, One-day
  • service: UPS Ground, FedEx Ground / FedEx Home Delivery, FedEx 2Day, Overnight
  • type: Fixed

offer wateheat:

  • started: April 28, 2026
  • availability: In Stock
  • sold: 0
  • options: Ship-to-home
  • quantity: 4

returns wateheat:

  • method: Money back
  • paid by: Buyer
  • time: 30 Days
  • policy: Returns Accepted

general wateheat:

  • Heating, Cooling Air > Water Heaters > Water Heater Parts
  • condition: New

seller wateheat:

  • city: Mount Prospect, Illinois
  • # reviews: 78
  • rating: 100.0%
part type: ignitor,
category: home & garden > heating, cooling air > water heaters > water heater parts, sku: 8039023775755633,

Rinnai SIG605 Is Similar To:

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5 offers $49.00–$96.99 USD
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