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Quick specs
Brand
Bryant
AFUE
80%
BTU Input
45,000 BTU/h
Heating Stages
Single-Stage
Not sure this fits your unit?
Call us with your model number and we'll confirm the right part before you order.
BRYANT Legacy Line 80% AFUE 45,000 BTU Single Stage Multi-Position Gas Furnace 17.5″ Wide 800SB42045M17
Bryant Legacy Line·Single-Stage Gas Valve
$2,422.96
-
- 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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BRYANT Legacy Line 80% AFUE 45,000 BTU Single Stage Multi-Position Gas Furnace 17.5″ Wide 800SB42045M17
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.
$2,422.96
-
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
Bryant
AFUE
80%
BTU Input
45,000 BTU/h
Heating Stages
Single-Stage
Not sure this fits your unit?
Call us with your model number and we'll confirm the right part before you order.
The Bryant 800SB42045M17 is an 80% AFUE non-condensing gas furnace from the Bryant Legacy Line. It delivers reliable single-stage heating with a multi-18-speed constant-torque (MCT) ECM blower motor for quiet, efficient airflow. Designed as a 4-way multipoise unit, it supports upflow, downflow, and horizontal installations and is ideal for residential applications where a compact, service-friendly furnace is needed.
Key Features
- Single-stage gas valve
- Multi 18-speed constant-torque (MCT) ECM blower motor
- QuieTech™ noise reduction system for quiet induced-draft operation
- Microprocessor-based “smart” control center with enhanced diagnostics (3-digit display for faults and status)
- Adjustable heating air temperature rise
- PerfectLight™ (or Perfect Light / silicon nitride / hot-surface) ignition
- Inner blower door for tighter sealing
- Convenient air purifier and humidifier connections
- Compact 33-1/3″ tall design
- Field-convertible for natural gas or propane (with conversion kit)
- 13 approved venting configurations (including through-the-furnace downflow venting)
- Cabinet air leakage <2.0% at 1.0 in. w.c. and <1.4% at 0.5 in. w.c. (ASHRAE 193)
- Hybrid Heat® dual-fuel compatible
Benefits
- Quiet operation thanks to QuieTech™ technology and the ECM motor
- Flexible installation in tight spaces or varied orientations (upflow, downflow, horizontal)
- Reliable performance with solid 80% AFUE efficiency and consistent airflow control
- Easier service and diagnostics via the smart control board and status display
- Versatile venting options and propane convertibility for broader application flexibility
- Tighter sealing and compact size improve suitability for many residential setups
Dimensions
- Height: 33.25 in (33-1/4″ / approx. 33-1/3″)
- Width: 17.5 in (17-1/2″ cabinet)
- Depth/Length: 29 in
- Weight: Approximately 120–131 lb (shipping/operational figures vary slightly by source)
Specifications
| Specification | Value |
|---|---|
| AFUE | 80% |
| Heating Stages | Single-stage |
| Input BTU/h | 42,000–44,000 (nominal 45,000) |
| Output BTU/h | ~35,000 |
| Blower Motor | 1/2 HP multi-18-speed MCT ECM |
| Cooling Capacity (CFM) | ~1,400 (nominal airflow ~1,285 CFM) |
| Heating CFM | ~720 (varies with static pressure) |
| Temperature Rise | 30–60°F |
| Voltage / Phase / Frequency | 115 VAC / Single-phase / 60 Hz |
| Max Overcurrent Protection | 15 A |
| Fuel Type | Natural gas or LP (field convertible) |
| Gas Connection | 1/2″ NPT |
| Ignition | Hot surface / PerfectLight™ |
| Configuration | Multi-position (4-way multipoise) |
| Color | Taupe |
| Country of Origin | USA |
| Energy Star | No |
Compatibility
- Compatible with natural gas or propane (requires approved conversion kit for LP).
- Works with Bryant/Carrier evaporator coils and many standard air handlers/coil combinations sized for ~1.5–2.5 ton cooling capacity (matching the ~1400 CFM blower rating).
- Supports accessory filter racks, coil adapter kits, return-air bases, humidifiers, air purifiers, and Hybrid Heat dual-fuel systems.
- Suitable for Category I venting with multiple approved configurations.
- Not designed for mobile homes, trailers, or RVs.
- Electrical: 115V single-phase power; standard residential wiring practices apply.
This Bryant model provides dependable heating performance with modern blower control and installation flexibility in a compact package. Always verify exact installation requirements, local codes, and matching components with a qualified HVAC technician. Specs can vary slightly by production run—refer to the official product data sheet for the latest details.
Key features
- Bryant Legacy Line — 80% AFUE non-condensing gas furnace
- Single-Stage Gas Valve — straightforward, reliable heat
- Multi-Speed Constant Torque ECM — quiet, efficient airflow
- 4-Way Multipoise Design — upflow, downflow or horizontal in a 17.5 in. cabinet
Why homeowners choose NAW
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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 33.25 in.
Width 17.5 in.
Length 29 in.
Customer reviews
What buyers are saying
Verified reviews from customers who purchased this product.
5.0
4 verified reviews
TF
Teddy F
The Bryant 80% AFUE 45,000 BTU Single Stage Multi-Position Gas Furnace 17.5″ Wide delivers outstanding heating performance while keeping energy costs low, making my home incredibly comfortable. With its unbeatable price and exceptional efficiency, this furnace is a must-have for anyone looking to upgrade their heating system without breaking the bank!
RF
Regina F
The Bryant 80% AFUE 45,000 BTU Single Stage Multi-Position Gas Furnace delivers outstanding heating performance with impressive efficiency. Built to last and priced just right, this furnace is a game-changer for keeping any space warm and comfortable.
NV
Norman V
The Bryant 80% AFUE 45,000 BTU Single Stage Multi-Position Gas Furnace is an absolute game-changer! At such an amazing price, it provides exceptional efficiency and reliable performance, quickly heating my space with ease and delivering top-notch quality I didn’t expect at this cost!
WK
Willard K
The Bryant 80% AFUE 45,000 BTU Single Stage Multi-Position Gas Furnace is a fantastic find with exceptional quality and performance! Its wider 17.5″ build fits perfectly, providing reliable, efficient heating that has exceeded all expectations at an amazing price.
