Suburban 2556A RV Furnace – SF-25Q Series, 25,000 BTU Ducted Furnace

Quiet, Efficient Heating with Flexible Ducting Options

The Suburban 2556A SF-25Q furnace is a 25,000 BTU LP gas RV furnace designed for reliable, ducted heating with flexible airflow configurations. Built on Suburban’s “Q” (quiet) platform, this furnace delivers consistent performance while reducing operational noise.

With multiple duct discharge options and energy-saving direct spark ignition, the SF-25Q is ideal for maintaining even heat distribution throughout your RV.

Who This Furnace Is Best For

This furnace is ideal for RV owners who need strong, ducted heating with flexible installation options:

• Owners of travel trailers, fifth wheels, and motorhomes with ducted systems
• RVs requiring side, top, or bottom duct discharge configurations
• Customers replacing an older SF-25 or SF-25Q furnace
• RVers looking for quieter operation and consistent heat distribution
• Cold-weather users needing reliable, whole-coach heating performance

This model is especially well-suited for multi-room RV layouts where even airflow is critical.

Features & Benefits

25,000 BTU heating capacity for mid-size RVs

Quiet operation design (Q series)

Multiple duct discharge options (side, top, and bottom)

Energy-saving direct spark ignition system

One-stage heating operation for consistent performance

Designed for ducted heating systems

Includes vent kit for 1-1/2 inch wall installations

Reliable performance in cold-weather conditions

Specifications

• Brand: Suburban
• Part Number: 2556A
• Series: SF-Q
• Model: SF-25Q
• Fuel Type: LP Gas
• BTU Output: 25,000 BTU
• Stage: 1 Stage
• Amp Draw: 7 Amps
• Width: 17 Inches
• Height: 7-1/2 Inches
• Depth: 20 Inches
• Weight: 31 Pounds
• Ignition Type: Direct spark ignition
• Ducting: Side, top, and bottom discharge
• Vent Kit: Included (for 1-1/2 inch wall)

Why Choose the SF-25Q?

Compared to older or basic furnaces, the SF-25Q offers:

• Quieter operation for improved comfort
• Flexible ducting options for better airflow control
• Consistent, even heat throughout your RV
• Reliable ignition with energy-efficient performance
• Compatibility with a wide range of ducted RV systems

It’s a strong choice for both replacement and new installations where ducted heating is required.

When Do You Need to Replace Your Furnace?

Consider upgrading if you experience:

• Uneven heating between rooms
• Excessive furnace noise
• Frequent ignition issues
• Aging furnace with declining performance
• Limited ducting flexibility in your current setup

Pro Tip

To get the best performance from a ducted furnace, make sure your duct system is properly sealed and free of obstructions. Even a high-performance furnace can lose efficiency if airflow is restricted.

FAQ

Q: Is this a ducted furnace?
A: Yes. The SF-25Q is designed for ducted heating with multiple discharge options.

Q: What makes the “Q” series different?
A: The “Q” series is designed for quieter operation and improved airflow compared to older models.

Q: Does this include a vent kit?
A: Yes. This model includes a vent kit designed for 1-1/2 inch wall installations.