31J35-31J3501

The Lennox 31J35 and Ducane Argosy 620 Pilot are two highly efficient and reliable heating systems designed to provide optimal comfort for your home during the cold winter months. These units are part of the Lennox Signature Collection and Ducane Argosy series, respectively, and are known for their superior performance and energy savings.

The Lennox 31J35 is a high-efficiency, single-stage furnace with an AFUE rating of up to 95%. This means that 95% of the fuel used is converted into heat for your home, with only 5% lost as exhaust. The unit features a durable stainless steel primary and secondary heat exchangers, which are designed to provide long-lasting performance and excellent heating capacity. Additionally, this furnace comes equipped with a variable-speed blower motor, which not only helps to improve the overall efficiency of the system but also provides more even temperature distribution and quieter operation. The 31J35 also includes a reliable and easy-to-use electronic ignition system, a sealed combustion chamber for improved safety, and a multi-position installation flexibility for easy integration into various home configurations.

The Ducane Argosy 620 Pilot is a high-efficiency, vented direct-vent gas log set designed to provide a realistic and attractive alternative to a traditional wood-burning fireplace. With an AFUE rating of up to 71%, this unit is an excellent choice for those looking to save energy while still enjoying the ambiance of a fireplace. The 620 Pilot features a ceramic fiber refractory bed and ceramic logs, which are designed to provide a long-lasting and attractive appearance. The unit also includes a pilotless ignition system, which ensures reliable operation and eliminates the need for constant pilot maintenance. Additionally, this vented gas log set comes with an adjustable thermostat control, allowing you to easily adjust the temperature to your desired level.

Both the Lennox 31J35 and Ducane Argosy 620 Pilot are covered by comprehensive warranties, providing peace of mind and protection against any manufacturing defects. The Lennox furnace includes a limited lifetime warranty on the heat exchanger, a 10-year limited warranty on select functional parts, and a 1-year limited warranty on labor. The Ducane Argosy 620 Pilot includes a 1-year limited warranty on the entire unit, and Ducane offers optional extended warranties for added protection.

In conclusion, the Lennox 31J35 and Ducane Argosy 620 Pilot are two exceptional heating solutions designed to provide the highest levels of performance, efficiency, and comfort for your home. Whether you're in the market for a high-efficiency furnace or a realistic vented gas log set, these units are sure to meet your needs and exceed your expectations. With their durable construction, reliable operation, and attractive designs, you can trust that these products will provide you with years of enjoyment and savings.

Comparison of Lennox 31J35, Ducane Armstrong 620, and Pilot Gas Furnaces: Pros, Cons, and Recommendation

The comparison below outlines the key features, advantages, and disadvantages of the Lennox 31J35, Ducane Armstrong 620, and Pilot gas furnaces to help you make an informed decision.

1. Lennox 31J35

- Energy Star certified, ensuring high energy efficiency.

- Variable-speed inducer motor for consistent airflow and improved comfort.

- Quiet operation with a maximum decibel level of 65.

- Two-stage heating for more precise temperature control.

- Higher initial cost compared to single-stage furnaces.

- Requires a dedicated electrical circuit for the variable-speed motor.

2. Ducane Armstrong 620

- Two-stage heating for better temperature control and energy savings.

- Efficient performance with an AFUE rating of 80%.

- One-piece design for easy installation and servicing.

- Quiet operation with a maximum decibel level of 68.

- Not Energy Star certified, which may result in higher energy bills over time.

- Single-speed blower motor, which may lead to temperature fluctuations.

3. Pilot Gas Furnace

- Simple and reliable design with a traditional standing pilot ignition.

- Lower initial cost compared to other models.

- Less energy-efficient than other modern furnaces, with an AFUE rating of 80% or below.

- Higher energy bills due to continuous operation.

- Requires regular pilot maintenance for optimal performance.

When comparing the Lennox 31J35, Ducane Armstrong 620, and Pilot gas furnaces, it's essential to consider factors such as energy efficiency, temperature control, noise level, and cost.

The Lennox 31J35 and Ducane Armstrong 620 are more energy-efficient and offer better temperature control features compared to the Pilot gas furnace. However, they come with a higher initial cost.

If energy efficiency and precise temperature control are your primary concerns, the Lennox 31J35 and Ducane Armstrong 620 are your best options. However, if you're looking for a more affordable solution with a simple design, the Pilot gas furnace may be the right choice for you.

Based on the comparison, we recommend the Lennox 31J35 or Ducane Armstrong 620 if you prioritize energy efficiency, temperature control, and quiet operation. If you're on a tight budget and prefer a more traditional design, the Pilot gas furnace could be a suitable choice.

Ultimately, your final decision should depend on your specific heating needs, budget, and preferences. It's always a good idea to consult with a professional HVAC technician for personalized recommendations and installation services.

Details:

Lennox ducane armstrong 31J35 - 620 31J3501 oem pilot assembly. Comes from working furnace. Good condition.

specifications maxohvac:

• brand: Lennox
• mpn: 31j35
• upc: 696334358506

payments maxohvac:

• credit card: discover
• other
• wallet: paypal

seller maxohvac:

• city: salt lake city, utah
• rating: 99.9%
• # reviews: 2266

returns maxohvac:

• policy: returns accepted
• time: 14 days
• method: money back
• paid by: buyer

shipping maxohvac:

• transit: 3-8 days
• service: usps ground advantage
• type: fixed
• class: standard
• carrier: usps

offer maxohvac:

• prices: $68.00–$140.02
• item condition:
  • New
  • Used
  • For parts or not working
  • Unspecified
• in stock #: 5
• availability: in stock
• sold #: 17
• options: ship-to-home
• started: december 28, 2025

general maxohvac:

• category: Business & Industrial > Hvac Refrigeration

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