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Upflow Furnaces

Upflow and horizontal gas furnaces from 30,000 to 120,000 BTU across every efficiency tier we carry.

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Goodman GRVS800805CU

Goodman 80% AFUE 80K BTU Furnace Variable Speed 21"W Ultra-Low NOx Upflow/Horizontal

SKU: GRVS800805CU
Product ID: 101502
$0.00 - $0.00
$0.00
$2,764.00
$2,764.00 - $2,764.00
$2,764.00

Product Details Goodman 80% 80K BTU Gas Furnace Upflow/Horizontal Variable Speed Ultra-Low NOx GRVS800805CU The Goodman GRVS800805CU is a high-val...

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GOODMAN GRVT960803BN

Goodman 96% AFUE 80K BTU Furnace Variable Speed 17.5"W Upflow/Horizontal

SKU: GRVT960803BN
Product ID: 101418
$0.00 - $0.00
$0.00
$3,067.00
$3,067.00 - $3,067.00
$3,067.00

Product Details Goodman 96% 80K BTU Gas Furnace Variable Speed Upflow/Horizontal 17.5"W GRVT960803BN The Goodman GRVT960803BN gas furnace delivers...

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GOODMAN GRVM971205DN

Goodman 97% AFUE 120K BTU Furnace Variable Speed 24.5"W Upflow/Horizontal

SKU: GRVM971205DN
Product ID: 101412
$0.00 - $0.00
$0.00
$4,051.00
$4,051.00 - $4,051.00
$4,051.00

Product Details Goodman 97% 120K BTU Gas Furnace Variable Speed Upflow/Horizontal 24.5"W GRVM971205DN The Goodman GRVM971205DN is a top-of-the-lin...

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Goodman GR9S960403BU

Goodman 96% AFUE 40K BTU Gas Furnace 9-Speed Ultra-Low NOx 17.5"W Upflow/Horizontal

SKU: GR9S960403BU
Product ID: 101363
$0.00 - $0.00
$0.00
$2,658.00
$2,658.00 - $2,658.00
$2,658.00

Product Details Goodman 96% 40K BTU Gas Furnace Ultra-Low NOx 17.5" Width Upflow/Horizontal GR9S960403BU The Goodman GR9S960403BU Gas Furnace is a...

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Goodman GR9T800804BX

Goodman 80% AFUE 80K BTU Furnace 9-Speed Low NOx 17.5"W Two Stage Upflow/Horizontal

SKU: GR9T800804BX
Product ID: 100959
$0.00 - $0.00
$0.00
$1,594.00
$1,594.00 - $1,594.00
$1,594.00

Product Details Goodman 80% 80K BTU Gas Furnace Low NOx 17.5" Width R32 Upflow/Horizontal GR9T800804BX The Goodman GR9T800804BX Gas Furnace delive...

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Goodman GR9T800603BX

Goodman 80% AFUE 60K BTU Furnace 9-Speed Low NOx 17.5"W Two Stage Upflow/Horizontal

SKU: GR9T800603BX
Product ID: 100955
$0.00 - $0.00
$0.00
$1,486.00
$1,486.00 - $1,486.00
$1,486.00

Product Details Goodman 80% 60,000 BTU Gas Furnace Low NOx 17.5"W Upflow/Horizontal GR9T800603BX The Goodman GR9T800603BX is a two-stage, energy-e...

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Goodman GR9T801205DN

Goodman 80% 120K BTU Gas Furnace 9-Speed 24.5"W Two Stage Upflow/Horizontal

SKU: GR9T801205DN
Product ID: 100968
$0.00 - $0.00
$0.00
$1,960.00
$1,960.00 - $1,960.00
$1,960.00

Product Details Goodman 120K BTU 80% Gas Furnace Two-Stage 9-Speed 24.5" Upflow/Horizontal R32 GR9T801205DN The Goodman GR9T801205DN is a powerful...

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Goodman GR9T800603BN

Goodman 80% 60K BTU Gas Furnace 17.5" Cabinet Two Stage Upflow/Horizontal

SKU: GR9T800603BN
Product ID: 100954
$0.00 - $0.00
$0.00
$1,486.00
$1,486.00 - $1,486.00
$1,486.00

Product Details Goodman 80% AFUE 60,000 BTU Gas Furnace 17.5" Wide Two Stage Upflow R32 GR9T800603BN The Goodman 80% AFUE R32 2-Stage Gas Furnace ...

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Goodman GR9S800805CN

Goodman 80% 80K BTU Gas Furnace 9-Speed 21"W Single Stage Upflow/Horizontal

SKU: GR9S800805CN
Product ID: 100945
$0.00 - $0.00
$0.00
$1,478.00
$1,478.00 - $1,478.00
$1,478.00

Product Details Goodman 80% 80,000 BTU Gas Furnace Single Stage 21" Width Upflow/Horizontal GR9S800805CN The Goodman GR9S800805CN Gas Furnace offe...

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Goodman GR9S800804CN

Goodman 80% 80K BTU Gas Furnace 9-Speed 21"W Single Stage Upflow/Horizontal

SKU: GR9S800804CN
Product ID: 100943
$0.00 - $0.00
$0.00
$1,449.00
$1,449.00 - $1,449.00
$1,449.00

Product Details Goodman 80% 80,000 BTU Gas Furnace Single Stage 21"W Upflow/Horizontal GR9S800804CN The Goodman GR9S800804CN gas furnace offers hi...

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Goodman GR9S800804BN

Goodman 80% 80K BTU Furnace 9-Speed 17.5"W Single Stage Upflow/Horizontal

SKU: GR9S800804BN
Product ID: 100941
$0.00 - $0.00
$0.00
$1,418.00
$1,418.00 - $1,418.00
$1,418.00

Product Details Goodman 80% AFUE 80,000 BTU Gas Furnace 17.5" Width Upflow/Horizontal R32 GR9S800804BN Upgrade your home’s heating system with the...

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Goodman GR9S800804BX

Goodman 80% 80K BTU Gas Furnace 9-Speed Low NOx 17.5"W Single Stage Upflow/Horizontal

SKU: GR9S800804BX
Product ID: 100942
$0.00 - $0.00
$0.00
$1,430.00
$1,430.00 - $1,430.00
$1,430.00

Product Details Goodman 80% 80K BTU Gas Furnace Low NOx 17.5" Width Upflow/Horizontal R32 GR9S800804BX The Goodman GR9S800804BX Low NOx Gas Furnac...

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Goodman GR9S800803BX

Goodman 80% 80K BTU Gas Furnace 9-Speed Low NOx 17.5"W Single Stage Upflow/Horizontal

SKU: GR9S800803BX
Product ID: 100940
$0.00 - $0.00
$0.00
$1,360.00
$1,360.00 - $1,360.00
$1,360.00

Product Details Goodman R32 80% AFUE Gas Furnace 80K BTU 17.5"W Low NOx Upflow/Horizontal The Goodman 80% AFUE R32 Gas Furnace delivers 80,000 BTU...

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Goodman GR9S800803BN

Goodman 80% AFUE 80K BTU Gas Furnace 17.5"W Single Stage Upflow/Horizontal

SKU: GR9S800803BN
Product ID: 100939
$0.00 - $0.00
$0.00
$1,344.00
$1,344.00 - $1,344.00
$1,344.00

Product Details Goodman 80% 80K BTU Gas Furnace Single Stage 17.5" Width Upflow/Horizontal GR9S800803BN The Goodman GR9S800803BN 80,000 BTU Gas Fu...

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Goodman GR9S800603AX

Goodman 80% AFUE 60K BTU Furnace 9-Speed Low NOx 14"W Single Stage Upflow/Horizontal

SKU: GR9S800603AX
Product ID: 100934
$0.00 - $0.00
$0.00
$1,294.00
$1,294.00 - $1,294.00
$1,294.00

Product Details Goodman R32 80% AFUE Gas Furnace 60K BTU 14" Wide Low NOx Upflow/Horizontal The Goodman GR9S800603AX Low NOx gas furnace is built ...

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Goodman GR9S800603AN

Goodman 80% 60K BTU Gas Furnace 9-Speed 14"W Single Stage Upflow/Horizontal

SKU: GR9S800603AN
Product ID: 100933
$0.00 - $0.00
$0.00
$1,277.00
$1,277.00 - $1,277.00
$1,277.00

Product Details Goodman 60,000 BTU 80% Gas Furnace 9 Speed Single Stage 14"W Upflow R32 GR9S800603AN The Goodman GR9S800603AN gas furnace delivers...

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Goodman GR9S800403AN

Goodman 80% 40K BTU Gas Furnace 9-Speed 14"W Single Stage Upflow/Horizontal

SKU: GR9S800403AN
Product ID: 100931
$0.00 - $0.00
$0.00
$1,196.00
$1,196.00 - $1,196.00
$1,196.00

Product Details Goodman 40,000 BTU 80% AFUE Gas Furnace 9 Speed Single Stage Upflow R32 GR9S800403AN The Goodman GR9S800403AN gas furnace delivers ...

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Goodman GR9S960805CN

Goodman 96% 80K BTU Furnace Nine-Speed 21"W Single Stage Upflow/Horizontal

SKU: GR9S960805CN
Product ID: 100910
$0.00 - $0.00
$0.00
$2,392.00
$2,392.00 - $2,392.00
$2,392.00

Product Details Goodman 96% 80K BTU Gas Furnace Single Stage Upflow/Horizontal R32 21"W GR9S960805CN The Goodman GR9S960805CN Gas Furnace combines...

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Goodman GR9S960403AN

Goodman 96% 40,000 BTU Gas Furnace Single Stage 14" Width Upflow/Horizontal

SKU: GR9S960403AN
Product ID: 100906
$0.00 - $0.00
$0.00
$1,828.00
$1,828.00 - $1,828.00
$1,828.00

Product Details Goodman 96% 40,000 BTU Gas Furnace Single Stage 14" Width Upflow/Horizontal GR9S960403AN The Goodman GR9S960403AN delivers high-ef...

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Goodman GR9S921205DN

Goodman 92% AFUE 120K BTU Gas Furnace 24.5"W Nine-Speed Upflow/Horizontal

SKU: GR9S921205DN
Product ID: 100905
$0.00 - $0.00
$0.00
$2,410.00
$2,410.00 - $2,410.00
$2,410.00

Product Details Goodman 92% AFUE 120K BTU Gas Furnace R32 Nine-Speed Upflow/Horizontal GR9S921205DN The Goodman GR9S921205DN is engineered for pow...

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Goodman GRVM970803BN

Goodman 97% 80,000 BTU Gas Furnace Variable Speed 17.5"W Upflow/Horizontal

SKU: GRVM970803BN
Product ID: 090394
$0.00 - $0.00
$0.00
$3,427.00
$3,427.00 - $3,427.00
$3,427.00

Product Details Goodman 80,000 BTU 97% AFUE Gas Furnace Variable Speed Modulating Upflow R32 GRVM970803BN The Goodman GRVM97 modulating gas furna...

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Goodman GR9S800604BN

Goodman 80% 60000 BTU Gas Furnace Single Stage 17.5" Wide Upflow/Horizontal

SKU: GR9S800604BN
Product ID: 090221
$0.00 - $0.00
$0.00
$1,311.00
$1,311.00 - $1,311.00
$1,311.00

Product Details Goodman 60,000 BTU 80% Gas Furnace 9-Speed 1-Stage 3/4 HP Upflow/Horizontal R32 GR9S800604BN The Goodman GR9S800604BN delivers rel...

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Goodman GRVT960804CN

Goodman 96% 80000 BTU Gas Furnace Variable Speed 21" Wide Upflow/Horizontal

SKU: GRVT960804CN
Product ID: 090034
$0.00 - $0.00
$0.00
$3,101.00
$3,101.00 - $3,101.00
$3,101.00

Product Details Goodman 96% 80,000 BTU Gas Furnace Variable Speed 21"W Upflow/Horizontal GRVT960804CN The Goodman GRVT960804CN Gas Furnace is part...

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Goodman GRVS800604BU

Goodman 80% AFUE 60K BTU Furnace Variable Speed 17.5" Ultra-Low NOx Upflow/Horizontal

SKU: GRVS800604BU
Product ID: 101501
$0.00 - $0.00
$0.00
$2,490.00
$2,490.00 - $2,490.00
$2,490.00

Product Details Goodman 80% 60K BTU Gas Furnace Variable Speed Ultra-Low NOx Upflow/Horizontal GRVS800604BU The Goodman GRVS800604BU is a reliable...

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An upflow furnace draws return air in through the bottom of the cabinet and pushes heated air out the top, which makes it the right orientation for the most common furnace location in American housing: a basement or a first-floor closet with the supply ducts running overhead. Every furnace in this collection also converts to horizontal for an attic or crawlspace install, so the same unit covers the two layouts that account for the large majority of homes. Downflow is the exception, for furnaces that sit above the living space and feed ducts below.

Capacity is the first decision and this page is organized around it, with sub-collections from 30,000 to 120,000 BTU. Efficiency is the second, from 80 percent AFUE with metal venting to 96 and 97 percent condensing models vented in PVC. If you are pairing the furnace with a heat pump for dual-fuel operation, our ACiQ gas furnace and heat pump systems bundle the two, and our upflow versus downflow furnace guide explains how to read your ductwork before you choose.

Why Choose Upflow Furnaces from HVAC Store?

  • We stock every residential capacity from 30,000 to 120,000 BTU across 80, 92, 96 and 97 percent AFUE tiers.

  • Orders over $1,000 ship free to the 48 contiguous states, and most states outside California pay no sales tax.

  • Find the same furnace priced lower elsewhere and we will match it under our lowest price guarantee.

  • Our specialists confirm capacity, cabinet width and coil pairing before your order ships.

You Might Also Like

  • Furnaces - Every furnace we carry across upflow, downflow and multi-positional orientations.

  • 40,000 BTU Upflow Furnaces - The small-home capacity, for condos, cabins and additions on their own duct run.

  • 60,000 BTU Upflow Furnaces - The most popular residential size, with the widest choice of staging and efficiency.

  • Downflow Furnaces - The other orientation, for furnaces installed above the ducts they feed.

Best Upflow Furnaces for...

Small Homes and Additions

The best upflow furnace for a compact, well-insulated home is the smallest capacity that still runs long enough to keep the house even. The Goodman 96% 30K BTU Gas Furnace 9-Speed 14"W Two Stage Upflow/Horizontal starts the range.

Typical Three and Four Bedroom Homes

The best upflow gas furnace for the average family home is an 80,000 BTU high-efficiency unit. The Goodman 96% AFUE 80,000 BTU Gas Furnace 17.5"W Nine-Speed Upflow/Horizontal pairs with a 3 to 4 ton coil.

Large Homes in Cold Climates

The best furnace upflow for a large home in a northern climate is a two stage 100,000 BTU unit that runs on low most of the season. The Goodman 96% 100K BTU Gas Furnace 9-Speed 21"W Two Stage Upflow/Horizontal holds temperature without swings.

Quietest Operation and Humidity Control

The best upflow furnace for comfort is a variable speed unit paired with a matching air conditioner. The Goodman 96% AFUE 100K BTU Furnace Variable Speed 24.5"W Upflow/Horizontal modulates its blower for steady airflow and better dehumidification.

Quick Spec Comparison

Every furnace in this collection installs upflow or horizontal and runs on standard household voltage. Capacity, efficiency, staging and cabinet width are what separate them.

Application

Capacity Range

AFUE Available

Staging

Cabinet Width

Small homes and additions

30,000 to 40,000 BTU

80 to 96 percent

Single or two stage

14 or 17.5 inch

Typical three and four bedroom homes

60,000 to 80,000 BTU

80 to 97 percent

Single, two stage or variable speed

14 to 21 inch

Large homes in cold climates

100,000 BTU

80 to 97 percent

Single, two stage or variable speed

21 or 24.5 inch

Largest homes and light commercial

120,000 BTU

96 percent

Single or two stage

24.5 inch

FAQ

What is an upflow furnace?

An upflow furnace is a gas furnace built to take return air in at the bottom of the cabinet and discharge heated air out the top into a plenum and supply ducts above it. It is the standard configuration for basements, utility rooms and closets where the ductwork runs above. Every furnace on this page can also be laid on its side for horizontal installation.

What is the difference between upflow and downflow?

The difference is the direction air travels through the cabinet. Upflow pulls air in at the bottom and sends it out the top, for furnaces below the ducts; downflow pulls air in at the top and sends it out the bottom, for furnaces above the ducts, such as a closet feeding a slab home. The heat exchanger and blower are arranged differently, so the two are not interchangeable.

How do I know what size upflow furnace I need?

Size the furnace to the home's heat loss, which depends on square footage, insulation, window area, ceiling height and climate. As a rough guide, a 40,000 BTU furnace suits up to about 1,300 square feet, 60,000 BTU up to about 2,000, 80,000 BTU up to about 2,700, and 100,000 to 120,000 BTU for larger or colder homes. A load calculation from your installer turns that guide into a firm number.

Is a 96 percent upflow furnace worth the extra cost?

A 96 percent AFUE furnace is worth it in any climate with a real heating season, because it sends about 16 percent less fuel up the flue than an 80 percent unit and pays the difference back in a few winters. It also vents in PVC through a side wall rather than a metal chimney. In mild climates with short heating seasons the 80 percent furnace remains the sensible buy.

Can an upflow furnace be installed horizontally?

Yes, every furnace here is rated for both upflow and horizontal installation. In horizontal position the unit lies on its side in an attic or crawlspace, return air in one end and supply out the other. Horizontal installs need a drain pan beneath a condensing furnace, a platform rated for the weight, and clearance to service the burners, all spelled out in the installation manual on each product page.

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