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Quick specs
Brand
Rheem
BTU Input
50,000 BTU/h
BTU Output
40,000 BTU/h
AFUE
80%
Heating Stages
Single-Stage
Blower Motor
1/2 HP 5-Speed Constant Torque ECM
Cabinet Width
14"
Airflow Configuration
Upflow/Horizontal
Max Cooling Airflow
1,305 CFM
Not sure this fits your unit?
Call us with your model number and we'll confirm the right part before you order.
Rheem Endeavor Line 80% AFUE 50,000 BTU Single-Stage Upflow/Horizontal Gas Furnace R801T0503A14UHSNAS
Rheem Endeavor Line Classic Series·80% AFUE Single-Stage
$1,941.17
-
- Free shipping — most items ship by the next day
Licensed HVAC technician required. Must be installed by a certified professional. Improper installation voids the manufacturer warranty.
Secure payment
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Rheem Endeavor Line 80% AFUE 50,000 BTU Single-Stage Upflow/Horizontal Gas Furnace R801T0503A14UHSNAS
Licensed HVAC technician required. Must be installed by a certified professional. Improper installation voids the manufacturer warranty.
Need help? (888) 292-0874
- Free shipping — most items ship by the next day
Secure payment
VISA MC AMEX DISC PayPal Affirm CHECK
In stock
In most items, small items ship same day. Complete systems ship next business day.
$1,941.17
-
Need help? (888) 292-0874
- Free shipping — most items ship by the next day
Secure payment
VISA MC AMEX DISC PayPal Affirm CHECK
Quick specs
Brand
Rheem
BTU Input
50,000 BTU/h
BTU Output
40,000 BTU/h
AFUE
80%
Heating Stages
Single-Stage
Blower Motor
1/2 HP 5-Speed Constant Torque ECM
Cabinet Width
14"
Airflow Configuration
Upflow/Horizontal
Max Cooling Airflow
1,305 CFM
Not sure this fits your unit?
Call us with your model number and we'll confirm the right part before you order.
This Rheem Endeavor Line Classic Series 80% AFUE Single-Stage Gas Furnace R801T0503A14UHSNAS is a solid, value-oriented choice for residential replacements or new installations needing a reliable 50k BTU upflow/horizontal furnace with modern diagnostic features and a compact footprint.
- Rheem Endeavor Line Classic Series
- 80% AFUE efficiency – Delivers reliable heating while helping keep operating costs reasonable for a standard-efficiency furnace.
- Single-stage heating – Simple, dependable operation with lower installation and service complexity.
- Constant Torque ECM blower motor – Provides consistent airflow, better efficiency than a standard PSC motor, and improved comfort and humidity control when paired with air conditioning.
- PlusOne® Diagnostics – Industry-first 7-segment LED display for fast, accurate troubleshooting and reduced service time.
- PlusOne® Ignition System – Proven Direct Spark Ignition (DSI) for reliable starts and long service life.
- Low-profile 34″ cabinet – Ideal for space-constrained installations (closets, attics, crawl spaces, etc.).
- Upflow/Horizontal multipoise design – Flexible installation options to fit a wide range of home layouts.
- Removable aluminized steel primary heat exchanger – Excellent corrosion resistance and thermal durability; removable design improves serviceability.
- Hemmed cabinet & door edges + quarter-turn fasteners – Tool-less access for safer, faster maintenance.
- Insulated blower compartment & solid bottom – Quieter operation and cleaner installation.
- Built-in connections – Humidifier, electronic air cleaner, and twinning provisions for system expandability.
- Natural gas ready (LP convertible) – Field-convertible to propane with the appropriate kit.
- 14″ cabinet width – Fits tight spaces while supporting up to 3-ton cooling airflow (≈1,305 CFM).
- Input: 50,000 BTU/h
- Output: 40,000 BTU/h
- AFUE: 80%
- Configuration: Upflow / Horizontal
- Cooling capacity: Up to 3 tons
- Blower motor: ½ HP 5-speed Constant Torque ECM
- Cabinet dimensions: 14″ W × 29.59″ D × 34″ H
- Weight: approx. 104.5–110 lbs
- Voltage: 115 V / 60 Hz / 1-phase
- Width: 14 in
- Depth: 29.59 in
- Height: 34 in
Key features
- Rheem Endeavor Line Classic Series — value-oriented, reliable gas heat
- 80% AFUE Single-Stage — dependable residential heating
- Modern Diagnostics — simplifies service and troubleshooting
- Compact Footprint — upflow/horizontal installation
Why homeowners choose NAW
Genuine OEM parts
Every part we sell is the real thing — authorized, factory-genuine, and backed by the full manufacturer warranty.
Easy online ordering
Find your part by model number, add to cart, and get it delivered to your door — no middleman, no markup.
30-day hassle-free returns
Ordered the wrong part? Send it back within 30 days.
Help when you need it
Not sure if this is the right part? Call us at (888) 292-0874 and we’ll help you find the correct replacement.
Dimensions
Height 34 in.
Width 14 in.
Length 29.59 in.
Customer reviews
What buyers are saying
Verified reviews from customers who purchased this product.
5.0
8 verified reviews
NB
Nelson B
The Rheem 80% AFUE 50,000 BTU Single Stage Upflow/Horizontal Gas Furnace 14″ Wide blew me away with how powerful and efficient it is for its compact size, and the price was unbelievably good. This unit delivers consistent comfort and outstanding performance that makes it an easy recommendation for anyone upgrading their heating system.
TE
Terry E
I was truly impressed by the powerful heating and efficiency of this Rheem 80% AFUE 50,000 BTU Single Stage Upflow/Horizontal Gas Furnace, delivering consistent warmth while keeping energy costs low. With outstanding quality at an excellent price, this furnace is a fantastic choice for reliable performance and long-term comfort.
TJ
Tracy J
I’m incredibly impressed with the Rheem 80% AFUE 50,000 BTU Single Stage Upflow/Horizontal Gas Furnace! The price is outstanding for such high-quality equipment, and it delivers reliable, efficient heating that keeps my home warm and comfortable without missing a beat!
TG
Thomas G
The Rheem 80% AFUE 50,000 BTU Gas Furnace, just 14 inches wide, packs a powerful punch, delivering efficient and consistent heating that quickly turned our home into a cozy retreat! Given its robust performance and compact design, the price was shockingly low, making this furnace an excellent choice for anyone seeking quality heating without overspending.
ZW
Zander W
I recently purchased the Rheem 80% AFUE 50,000 BTU Single Stage Upflow/Horizontal Gas Furnace 14″ Wide, and I’m thrilled with the unbeatable price, exceptional equipment quality, and outstanding performance that have transformed my home heating experience!
ZR
Zack R
I can’t contain my excitement about the Rheem 80% AFUE 50,000 BTU Gas Furnace – the price is unbeatable for the exceptional equipment and top-notch performance it offers. This furnace, with its single-stage design and impressive 14″ width, exceeded my expectations, providing outstanding warmth and efficiency at a surprisingly affordable cost!
M
Mill
Absolutely blown away by the Rheem 80% AFUE 50,000 BTU Single Stage Upflow/Horizontal Gas Furnace – not only is the price a fantastic deal, but the equipment’s compact design and powerful performance make it a true standout. This furnace has revolutionized my home heating experience, offering unparalleled efficiency at an unbeatable price!
G
Glenda
Unbelievable efficiency in a compact design! The Rheem 80% AFUE 50,000 BTU Single Stage Upflow/Horizontal Gas Furnace, spanning just 14″ wide, astounds with its remarkable heating performance and top-tier equipment, all at an incredibly competitive price. Its single-stage operation ensures reliable and efficient heating, providing impressive comfort without compromising on affordability or size.
