Suburban 2555A RV Furnace – SF-25FQ Series, 25,000 BTU Ducted Furnace

High-Performance Ducted Heating Without Exterior Access

The Suburban 2555A SF-25FQ furnace is a 25,000 BTU LP gas RV furnace designed for maximum ducted heating performance with interior service access. Built on Suburban’s “FQ” (front gas + quiet) platform, this furnace delivers efficient, consistent heat while eliminating the need for an exterior access door.

With automatic direct spark ignition and a compact, low-profile design, the SF-25FQ is ideal for modern RV layouts that prioritize interior access, reduced noise, and reliable cold-weather performance.

Who This Furnace Is Best For

This model is ideal for RV owners who need powerful, ducted heating with interior access:

• Owners of travel trailers, fifth wheels, and larger RVs with ducted systems
• RVs that do not have or do not want an exterior furnace access door
• Customers replacing an older SF-25, SF-25Q, or SF-25F furnace
• Installations requiring front gas connection (interior hookup)
• RVers looking for quieter operation with consistent airflow

This furnace is especially appealing for four-season RV use, where reliable, evenly distributed heat is critical.

Features & Benefits

25,000 BTU heating capacity for mid-size RVs

Maximum ducted design for even heat distribution

Front gas connection for interior installation access

No exterior access door required

Automatic direct spark ignition for reliable startups

Quiet operation design (FQ series)

Compact, low-profile cabinet (7-1/2 inch height)

Ideal for enclosed or interior service installations

Specifications

• Brand: Suburban
• Part Number: 2555A
• Series: SF-FQ
• Model: SF-25FQ
• Fuel Type: LP Gas
• BTU Output: 25,000 BTU
• Height: 7-1/2 Inches
• Width: 17 Inches
• Depth: 20 Inches
• Ignition Type: Automatic direct spark ignition
• Installation Type: Ducted furnace
• Gas Connection: Front (interior access)
• Access Requirement: No exterior access door required

Why Choose the SF-25FQ?

Compared to traditional exterior-access furnaces, the SF-25FQ offers:

• Interior servicing for easier maintenance
• Cleaner exterior RV appearance (no access panel)
• Improved noise reduction
• Consistent heat distribution through ducting
• Flexible installation for modern RV designs

This makes it a top choice for both replacement and new installation applications.

When Do You Need to Replace Your Furnace?

Consider upgrading if you experience:

Uneven heating throughout your RV

Frequent ignition or cycling issues

Excessive furnace noise

Aging unit with declining performance

Desire to eliminate exterior access panels

Pro Tip

When installing a ducted furnace like the SF-25FQ, ensure your ductwork is properly sealed and sized. Poor ducting can reduce efficiency and airflow, even with a high-performance furnace.

FAQ

Q: Does this furnace require an exterior access door?
A: No. The SF-25FQ is designed for interior access and does not require an exterior door.

Q: Is this a ducted furnace?
A: Yes. It is designed for maximum ducted airflow and even heat distribution.

Q: What does “FQ” mean?
A: “F” indicates a front gas connection (interior hookup), and “Q” refers to quieter operation and updated design.