Suburban Furnace Core | 2614A | RP-40N | 40K BTU | NT-40SP

Restore your Suburban NT-40SP furnace with the Suburban Furnace Core (Part #2614A / RP-40N). Genuine Suburban OEM furnace core (heat exchanger + burner + blower assembly) — the complete internal working unit that fits into your existing furnace cabinet. 40,000 BTU, 12V series, quiet operation, incredibly compact and lightweight design. Cabinet assembly NOT included.

What This Does

The furnace core is the complete internal working assembly of your Suburban furnace — heat exchanger, burner, blower, and gas train pre-assembled as a single unit that slides into the existing furnace cabinet. When the internal components fail but the cabinet is still serviceable, this core lets you rebuild the furnace without replacing the entire unit.

⭐ Primary Fitment — Suburban NT-40SP

Direct replacement core for Suburban NT-40SP furnaces (12V series). 40,000 BTU output.

Different NT-Series BTU Rating?

Suburban offers other furnace core BTU variants for different NT-Series models:

• Suburban 30K BTU Furnace Core 2613A / RP-30N — for NT-30SP (also fits NT-24SP/NT-34SP with BTU change)

120V Park Model Instead?

If your furnace is a 120V Park Model (not a 12V coach furnace), see the Suburban 40K BTU Furnace Core 2615A / RP-40P — same 40K BTU output, engineered for NT-40P 120V Park Model applications.

• Suburban 40K BTU Furnace Core 2614A / RP-40N (this listing) — for NT-40SP

⭐ Ideal Replacement for Obsolete Competitive Furnaces

With multiple side OR bottom duct options, Suburban furnace cores are easy to install and make an ideal replacement for obsolete competitive furnaces. If your original furnace brand is no longer supported, this Suburban core can often be adapted with the existing cabinet or a Suburban cabinet.

⚠️ Cabinet Assembly NOT Included

Important buyer note: this is the furnace core only. The cabinet assembly is NOT included. You must have:

• Your existing furnace cabinet (matching 23" × 12.5" × 12" internal dimensions)
• OR a compatible Suburban cabinet purchased separately

Dimensions and Fitment

• Casing Dimensions: 23" × 12.5" × 12"
• Core: Marginally smaller than casing to slide into the cabinet

Performance Specifications

• BTU: 40,000
• Amp Draw: 9.5 A
• Series: 12V

Related Suburban NT-Series Components

If you're servicing an NT-Series furnace installation, related parts:

• Suburban Blower Motor 521138 — for NT-34 and NT-40
• Suburban NT-Series Gas Valve (161123) — for NT-12S through NT-42T

SF-Series Instead?

If your furnace is a Suburban SF-Series (not NT-Series), see the Suburban 25K BTU Furnace Core 2608A / RP-30FQ — for SF-25F/25FQ/30F/30FQ/FQ (2555A/2558A) furnaces.

Suburban Quality — Trusted Name in the RV Industry

Suburban furnaces and furnace cores are designed, built, and backed by one of the most trusted names in the RV industry. Uniform cabinet sizes provide installation flexibility, and quiet operation makes the coach interior more inviting.

Cross-Reference Part Numbers

• SKU: 2614A
• Alt SKU: RP-40N

⚠️ Professional Installation Required

Furnace core installation involves LP gas connections, 12V DC electrical wiring, and proper cabinet alignment. Because of the safety-critical nature of furnace gas systems, installation should be performed by a qualified RV service technician. Improper installation can result in gas leaks, fire, or explosion hazards. Always test all gas connections with leak detection solution before returning the furnace to service.

Limited 2-Year Suburban Manufacturer Warranty

Genuine Suburban OEM

Key Features

• Genuine Suburban OEM RV furnace core
• SKU: 2614A (Alt: RP-40N)
• 40,000 BTU
• 9.5 A amp draw
• 12V series
• Fits Suburban NT-40SP furnaces
• 30K BTU sibling available: Suburban 2613A / RP-30N (for NT-30SP, also fits NT-24SP/NT-34SP with BTU change)
• Multiple side OR bottom duct options
• Ideal replacement for obsolete competitive furnaces
• Incredibly compact and lightweight
• Quiet, dependable operation
• Casing dimensions: 23" × 12.5" × 12"
• Cabinet assembly NOT included
• Backed by limited 2-year Suburban manufacturer warranty

Specifications

• Brand: Suburban
• SKU: 2614A
• Alt SKU: RP-40N
• Type: RV Furnace Core (Heat Exchanger + Burner + Blower Assembly)
• BTU: 40,000
• Amp Draw: 9.5 A
• Series: 12V
• Compatible Furnace: Suburban NT-40SP
• 30K BTU Sibling: Suburban 2613A / RP-30N (NT-30SP primary, also NT-24SP/NT-34SP with BTU change)
• Duct Options: Multiple side OR bottom duct options
• Casing Dimensions: 23" × 12.5" × 12"
• Cabinet Assembly: NOT included
• Warranty: Limited 2-year Suburban manufacturer warranty