The 30 to 40 inch bracket is the most popular size for living rooms, and the widest selection on the site. Here you will find 30 inch direct vent gas fireplaces, 36 inch linears from Napoleon Vector, Montigo DelRay and Empire Boulevard, Superior vent free fireboxes, Faber e-MatriX electric units and outdoor Riverside gas fireplaces. Output stretches from 15,000 BTU through 40,000 BTU on gas, with wood and electric alternatives. The category fits a standard framed wall without overwhelming the room.

43 products
  • Superior VRT3100 Vent-Free Gas Firebox – Back Bay Brown Fiber Liners 40,000 BTU Superior VRT3100 Vent-Free Gas Firebox – Back Bay Brown Fiber Liners 40,000 BTU
    Superior VRT3100 Vent-Free Gas Firebox – Back Bay Brown Fiber Liners 40,000 BTU
    Superior Fireplaces

    Superior VRT3100 Vent-Free Gas Firebox – Back Bay Brown Fiber Liners 40,000 BTU

    Vent-Free Firebox · Back Bay Brown Fiber Liners · 32", 36" or 42" Warm Back Bay Brown liners in the same VRT3100 shell This VRT3100 swaps the white refractory for...
    $999.00
    $999.00

    40k BTUNatural Gas / PropaneVent-Free32 / 36 / 42 in view

    Ready to ship free US delivery

  • Superior VRT3100 Vent-Free Gas Firebox – White Stacked Liners 40,000 BTU Superior VRT3100 Vent-Free Gas Firebox – White Stacked Liners 40,000 BTU
    Superior VRT3100 Vent-Free Gas Firebox – White Stacked Liners 40,000 BTU
    Superior Fireplaces

    Superior VRT3100 Vent-Free Gas Firebox – White Stacked Liners 40,000 BTU

    Vent-Free Firebox · White Stacked Liners · 32", 36" or 42" A heat-circulating firebox with bright white stacked liners The Superior VRT3100 in white stacked liners is a clean-faced, heat-circulating...
    $999.00
    $999.00

    40k BTUNatural Gas / PropaneVent-Free32 / 36 / 42 in view

    Ready to ship free US delivery

  • Buck Stove 34" Model 34 Contemporary Vent Free Gas Stove Insert with Blower 33,000 BTU Buck Stove 34" Model 34 Contemporary Vent Free Gas Stove Insert with Blower 33,000 BTU
    Buck Stove 34" Model 34 Contemporary Vent Free Gas Stove Insert with Blower 33,000 BTU
    Buck Stove

    Buck Stove 34" Model 34 Contemporary Vent Free Gas Stove Insert with Blower 33,000 BTU

    Vent Free Gas Stove · 33,000 BTU · 34" Wide Contemporary vent free flames with an adjustable trim kit The Buck Stove Model 34 Contemporary is a vent free gas...
    $1,899.00
    $1,899.00

    33k BTUNatural Gas / PropaneVent-Free34 in view

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  • Empire Tahoe 32" Direct Vent Propane or Natural Gas Fireplace Empire Tahoe Deluxe direct vent fireplace (series photo)
    Empire Tahoe 32" Direct Vent Propane or Natural Gas Fireplace
    $180 off
    Empire

    Empire Tahoe 32" Direct Vent Propane or Natural Gas Fireplace

    Direct Vent Gas Fireplace · 32 in. · Natural Gas or Propane · Millivolt A millivolt direct vent fireplace that fits a slim wall cavity The Empire Tahoe Deluxe 32...
    $1,729.00
    $1,909.00 $1,729.00

    18k BTUNatural Gas / PropaneDirect Vent32 in view

    Ready to ship free US delivery

    Sale
  • Superior 35" Direct-Vent Fireplace, Traditional Front Open, Electric-Rear
    Superior 35" Direct-Vent Fireplace, Traditional Front Open, Electric-Rear
    Superior Fireplaces

    Superior 35" Direct-Vent Fireplace, Traditional Front Open, Electric-Rear

    Direct Vent Gas Fireplace · 35 in. · Propane or Natural Gas Real flames over aged oak logs, sealed behind glass The Superior DRT2035 is a traditional front-open gas fireplace...
    $1,999.00
    $1,999.00

    15k BTUNatural Gas / PropaneDirect Vent35 in view

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  • Empire Breckenridge 36" Vent Free See Through Premium Firebox 40,000 BTU Empire Breckenridge 36" Vent Free See Through Premium Firebox 40,000 BTU
    Empire Breckenridge 36" Vent Free See Through Premium Firebox 40,000 BTU
    Empire

    Empire Breckenridge 36" Vent Free See Through Premium Firebox 40,000 BTU

    Vent Free See-Through Premium Firebox · 36 in. · 40,000 BTU · Zero Clearance A see-through vent free firebox for sharing a fire between rooms The Empire Breckenridge 36 Premium...
    $1,849.00
    $1,849.00

    40k BTUNatural Gas / PropaneVent-Free36 in view

    Ready to ship free US delivery

  • Empire Breckenridge 36" Vent Free Deluxe Firebox 40,000 BTU Empire Breckenridge 36" Vent Free Deluxe Firebox 40,000 BTU
    Empire Breckenridge 36" Vent Free Deluxe Firebox 40,000 BTU
    Empire

    Empire Breckenridge 36" Vent Free Deluxe Firebox 40,000 BTU

    Vent Free Deluxe Firebox · 36 in. · 40,000 BTU · Zero Clearance A 36-inch vent free firebox with a flush or louvered face The Empire Breckenridge 36 Deluxe (VFD36FB)...
    $689.00
    $689.00

    40k BTUNatural Gas / PropaneVent-Free36 in view

    Ready to ship free US delivery

  • Empire Breckenridge 32" Vent Free Deluxe Firebox 40,000 BTU Empire Breckenridge 32" Vent Free Deluxe Firebox 40,000 BTU
    Empire Breckenridge 32" Vent Free Deluxe Firebox 40,000 BTU
    Empire

    Empire Breckenridge 32" Vent Free Deluxe Firebox 40,000 BTU

    Vent Free Deluxe Firebox · 32 in. · 40,000 BTU · Zero Clearance A 32-inch firebox shell for a vent free fire of your own design The Empire Breckenridge 32...
    $629.00
    $629.00

    40k BTUNatural Gas / PropaneVent-Free32 in view

    Ready to ship free US delivery

  • Empire Boulevard 36" Direct Vent Linear Fireplace 29,000 BTU Empire Boulevard 36" Direct Vent Linear Fireplace 29,000 BTU
    Empire Boulevard 36" Direct Vent Linear Fireplace 29,000 BTU
    Empire

    Empire Boulevard 36" Direct Vent Linear Fireplace 29,000 BTU

    Direct Vent Linear Gas Fireplace · 36 in. · 29,000 BTU A fully recessed 36-inch linear flame that keeps running in a power cut The Empire Boulevard 36 direct vent...
    $4,649.00
    $4,649.00

    29k BTUNatural Gas / PropaneDirect Vent36 in view

    Ready to ship free US delivery

  • Empire Boulevard 36" Vent Free Linear Fireplace 28,000 BTU Empire Boulevard 36" Vent Free Linear Fireplace 28,000 BTU
    Empire Boulevard 36" Vent Free Linear Fireplace 28,000 BTU
    Empire

    Empire Boulevard 36" Vent Free Linear Fireplace 28,000 BTU

    Vent Free Linear Fireplace · 36 in. · 28,000 BTU Add a long, low flame to a wall with no vent run The Empire Boulevard 36 (VFLB36FP) is a vent...
    $2,649.00
    $2,649.00

    28k BTUNatural Gas / PropaneVent-Free36 in view

    Ready to ship free US delivery

  • Faber e-MatriX 37" Double-Sided Built-in Electric Fireplace Faber e-MatriX 37" Double-Sided Built-in Electric Fireplace
    Faber e-MatriX 37" Double-Sided Built-in Electric Fireplace
    Faber

    Faber e-MatriX 37" Double-Sided Built-in Electric Fireplace

    Built-in Electric Fireplace · Two-Sided · 37 in. · Water Vapor Flame A two-sided flame you can see from both rooms The 37-inch Faber e-MatriX two-sided firebox brings the water...
    $6,699.00
    $6,699.00

    ElectricNo Vent Required (Electric)37 in view

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  • Faber e-MatriX 35" Single Sided Built-in Electric Fireplace Faber e-MatriX 35" Single Sided Built-in Electric Fireplace
    Faber e-MatriX 35" Single Sided Built-in Electric Fireplace
    Faber

    Faber e-MatriX 35" Single Sided Built-in Electric Fireplace

    Built-in Electric Fireplace · Single-Sided · 35 in. · Water Vapor Flame Real-looking flames with no gas line and no flue The Faber e-MatriX 800/650-I turns water vapor and LED...
    $6,499.00
    $6,499.00

    ElectricNo Vent Required (Electric)35 in view

    Ready to ship free US delivery

  • Montigo DelRay 38" Full Load Single-Sided Direct Vent Square Gas Fireplace 24,000 BTU Montigo DelRay 38" Full Load Single-Sided Direct Vent Square Gas Fireplace 24,000 BTU
    Montigo DelRay 38" Full Load Single-Sided Direct Vent Square Gas Fireplace 24,000 BTU
    Montigo

    Montigo DelRay 38" Full Load Single-Sided Direct Vent Square Gas Fireplace 24,000 BTU

    Full Load Direct Vent Square Gas Fireplace · 38 in. · 24,000 BTU 24,000 BTU, a remote and a fan, all in one square fireplace The DelRay Square 38 Full...
    $4,079.00
    $4,079.00

    24k BTUNatural Gas / PropaneDirect Vent38 in view

    Ready to ship free US delivery

  • Montigo DelRay 34" Full Load Single-Sided Direct Vent Square Gas Fireplace 18,000 BTU Montigo DelRay 34" Full Load Single-Sided Direct Vent Square Gas Fireplace 18,000 BTU
    Montigo DelRay 34" Full Load Single-Sided Direct Vent Square Gas Fireplace 18,000 BTU
    Montigo

    Montigo DelRay 34" Full Load Single-Sided Direct Vent Square Gas Fireplace 18,000 BTU

    Full Load Direct Vent Square Gas Fireplace · 34 in. · 18,000 BTU A fully equipped 34-inch square fireplace for tight spaces The DelRay Square 34 Full Load (DRSQ34-2) ships...
    $3,639.00
    $3,639.00

    18k BTUNatural Gas / PropaneDirect Vent34 in view

    Ready to ship free US delivery

  • Montigo DelRay 38" Basic Single Sided Direct Vent Square Gas Fireplace 20,500 BTU Montigo DelRay 38" Basic Single Sided Direct Vent Square Gas Fireplace 20,500 BTU
    Montigo DelRay 38" Basic Single Sided Direct Vent Square Gas Fireplace 20,500 BTU
    Montigo

    Montigo DelRay 38" Basic Single Sided Direct Vent Square Gas Fireplace 20,500 BTU

    Direct Vent Square Gas Fireplace · 38 in. · 20,500 BTU Step up to 20,500 BTU in a square direct vent fireplace The DelRay Square 38 Basic (DRSQ38) offers more...
    $2,859.00
    $2,859.00

    20.5k BTUNatural Gas / PropaneDirect Vent38 in view

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  • Montigo DelRay 34" Basic Single Sided Direct Vent Square Gas Fireplace 15,000 BTU Montigo DelRay 34" Basic Single Sided Direct Vent Square Gas Fireplace 15,000 BTU
    Montigo DelRay 34" Basic Single Sided Direct Vent Square Gas Fireplace 15,000 BTU
    Montigo

    Montigo DelRay 34" Basic Single Sided Direct Vent Square Gas Fireplace 15,000 BTU

    Direct Vent Square Gas Fireplace · 34 in. · 15,000 BTU A compact square fireplace you can restyle with one burner The DelRay Square 34 Basic (DRSQ34) is Montigo's smallest...
    $2,599.00
    $2,599.00

    15k BTUNatural Gas / PropaneDirect Vent34 in view

    Ready to ship free US delivery

  • Montigo DelRay 36" Full Load Single-Sided Direct Vent Linear Gas Fireplace 16,000 BTU Montigo DelRay 36" Full Load Single-Sided Direct Vent Linear Gas Fireplace 16,000 BTU
    Montigo DelRay 36" Full Load Single-Sided Direct Vent Linear Gas Fireplace 16,000 BTU
    Montigo

    Montigo DelRay 36" Full Load Single-Sided Direct Vent Linear Gas Fireplace 16,000 BTU

    Full Load Direct Vent Linear Gas Fireplace · 36 in. · 16,000 BTU A fully equipped 36-inch linear fire with the remote built in The DelRay 36 Full Load (DRL3613-2)...
    $3,599.00
    $3,599.00

    16k BTUNatural Gas / PropaneDirect Vent36 in view

    Ready to ship free US delivery

  • Montigo DelRay 36" Basic Single-Sided Direct Vent Linear Gas Fireplace 16,000 BTU Montigo DelRay 36" Basic Single-Sided Direct Vent Linear Gas Fireplace 16,000 BTU
    Montigo DelRay 36" Basic Single-Sided Direct Vent Linear Gas Fireplace 16,000 BTU
    Montigo

    Montigo DelRay 36" Basic Single-Sided Direct Vent Linear Gas Fireplace 16,000 BTU

    Direct Vent Linear Gas Fireplace · 36 in. · 16,000 BTU A slim 36-inch ribbon of flame for small rooms and retrofits The DelRay 36 Basic is the smallest model...
    $2,549.00
    $2,549.00

    16k BTUNatural Gas / PropaneDirect Vent36 in view

    Ready to ship free US delivery

  • Superior WRT6000 Traditional Vented Wood Burning Masonry Fireplace Superior WRT6000 Traditional Vented Wood Burning Masonry Fireplace
    Superior WRT6000 Traditional Vented Wood Burning Masonry Fireplace
    Superior Fireplaces

    Superior WRT6000 Traditional Vented Wood Burning Masonry Fireplace

    Wood Burning Masonry Fireplace · Open Hearth · 36 / 42 / 50 in. · Front View A grand open hearth that reads as real masonry The Superior WRT6000 is...
    $3,429.00
    $3,429.00

    WoodChimney / Masonry36 / 42 / 50 in view

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  • Superior WRT4500 Traditional Vented Wood Burning Fireplace Superior WRT4500 Traditional Vented Wood Burning Fireplace
    Superior WRT4500 Traditional Vented Wood Burning Fireplace
    Superior Fireplaces

    Superior WRT4500 Traditional Vented Wood Burning Fireplace

    Vented Wood-Burning Fireplace · 36", 42" or 50" · 30" Tall Opening The big custom fireplace with a brick-to-face opening The Superior WRT4500 is designed for large custom installs, with...
    $3,779.00
    $3,779.00

    WoodChimney / Masonry36 / 42 / 50 in view

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Buying a 30 to 40 inch gas fireplace or insert

Decide first whether you are replacing an existing opening or building a new wall. For an existing masonry hearth, an insert in the 30 to 40 inch range slides in and gets a liner and surround. For new construction, a framed direct vent box offers more freedom in placement. Within this range, 30 inch models give a tidy flame that suits a bedroom or a den, 36 inch boxes are the default living room choice, and 40 inch units give wider viewing. Compare BTU, glass style, and the finishing kit, because some models need a surround or trim sold separately. Check the ceiling height for mantel and TV clearances.

Is a 36 inch gas fireplace big enough for a living room?

Yes, it is the common choice. A 36 inch fireplace with 20,000 to 30,000 BTU heats most living rooms and fits a standard framed wall.

What is the difference between a gas fireplace and a gas insert?

A fireplace is built into a new framed wall, while an insert is sized to slide into an existing masonry opening and is vented through a liner.