AOG L-Series Built-In Size Guide

Three measurements define the rough opening, plus a fourth measurement if your countertop has a front overhang.

• Width — the side-to-side cutout width. This determines which grill fits.
• Depth — the front-to-back cutout depth. AOG specifies 19½″ for all three sizes.
• Height — the cutout height from the countertop down to the bottom of the cutout pocket. AOG specifies 8½″ for all three sizes.
• Front-panel overhang width — applies only to non-combustible enclosures with a countertop overhang above the front panel. The overhang must be cut flush with the front wall for the full width of the control panel.

The grill rests on a stainless steel hanger that wraps the upper portion of the unit and seats on the left, right, and back edges of the countertop cutout. Two front support adjustment bolts under the control panel carry the front load. The hanger flange is approximately 1¾″ wide on all sides; plan the countertop opening with that flange in mind.

This guide covers cutout dimensions, clearance requirements, ventilation, gas supply, and electrical specifications for installing the AOG L-Series built-in gas grill in 24″, 30″, or 36″ sizes. Every number is taken from the AOG 2026 Product Specifications Guide and the AOG L & T Series Installation and Owner’s Manual. Always confirm against the printed Owner’s Manual that ships with your grill before construction.

Cutouts below apply to the AOG L-Series in a non-combustible enclosure (brick, stone, masonry, or any non-combustible framing).

When the surrounding enclosure is constructed from combustible material (wood, composite, or any non-fire-rated framing), AOG requires the matching insulating liner. The liner ships separately from the grill. The countertop above the cutout must always be non-combustible regardless of enclosure construction.

AOG specifies the following minimum built in grill clearances. These numbers protect the surrounding structure from heat and protect the grill from poor ventilation. Values come from the AOG L & T Series Installation and Owner’s Manual.

L-Series total BTU demand includes the infrared backburner, which is standard on every L-Series.

• Pipe size: ½″ minimum interior diameter. For runs longer than 20 feet, a larger diameter line may be required to deliver rated BTU input without pressure loss. Refer to NFPA 54 guidelines and a licensed gas technician for sizing.
• NG inlet pressure: nominal 7″ water column, minimum 5″, maximum 10½″.
• LP inlet pressure: nominal 11″ water column, minimum 10″, maximum 13″.
• Manual shut-off valve is required in the supply line within 6 feet of the grill, easily accessible.
• C.S.A.-approved stainless steel flex connector with attached regulator is included and pre-installed at the valve manifold.
• No rubber hose inside the enclosure. Use pipe joint compound rated for all gases on NPT pipe fittings; do not use compound on flare fittings.

Every AOG L-Series grill ships with a gas conversion kit. A unit shipped configured for natural gas can be converted to propane (and the reverse) by a qualified gas technician using the orifices and instructions in the Owner’s Manual.

When a 20-lb propane cylinder is housed inside the island, AOG specifies additional requirements: a C.S.A.-listed stainless steel flex connector from the cylinder regulator to the grill (a ½″ male-to-male flare adapter is required and not included), a non-combustible heat shield protecting the regulator and cylinder valve, the cylinder secured at least 2″ above the ground with the pressure relief valve pointed toward the vent opening, and an additional vent opening near the cylinder gas connection (minimum 10 sq in free area). AOG’s optional access door with tank tray and louvers (AOG14TR) is engineered to satisfy all these requirements. Cylinders must be marked “propane” only.

The AOG L-Series requires a properly wired and inspected 120V AC, 15 AMP minimum, 60 Hz, GFCI grounded three-wire receptacle within reach of the unit. The receptacle must be a weather-proof in-use covered receptacle. The 120V supply powers the Flame Thrower electronic ignition, the interior halogen oven lights, the external Multi-Color LED Light Bar, and the LED master power button. The L-Series cannot operate without it.

Plan the electrical rough-in before island construction so the receptacle sits inside the enclosure, accessible to the grill’s power harness, and protected from direct water exposure even with the in-use cover closed.

Custom-built enclosures must be ventilated according to gas type. AOG specifies these minimums.

One side of the enclosure must be left fully open OR you must create one of the following vent setups:

• 1 minimum vent opening at top level with at least 20 sq in of free area, beginning 1″ or less below the countertop and ending no more than 5″ below the countertop, OR
• 2 vents (1 top + 1 floor) with at least 10 sq in of free area each (totalling 20 sq in). Floor vent begins 1″ or less above floor level and ends no more than 5″ above the floor.

One side fully open OR 4 vents:

• 2 top vents on adjacent walls (spaced at least 90° apart), 10 sq in free area each (20 sq in total), within 5″ of countertop.
• 2 floor vents on adjacent walls (spaced at least 90° apart), 5 sq in free area each (10 sq in total), within 5″ of floor.
• Total: 30 sq in free area minimum.
• For LP cylinders larger than 20 lb: at least 1 in² per pound of cylinder capacity for top vents and at least ½ in² per pound for bottom vents.

One side fully open OR 4 vents on adjacent walls (2 top + 2 floor at ≥90° spacing), each 45 sq in minimum free area, totalling 180 sq in.

• Every opening must allow at least a 3/16″ rod to enter.
• Maintain at least 6″ clearance from any items outside the enclosure.
• Maintain at least 2″ clearance from any items inside the enclosure.
• Vent openings in side walls cannot communicate directly with other enclosures of the appliance.
• Side-wall vents must not be located in front of the appliance above floor level.

Built in grill installation is straightforward when the island is designed around AOG’s hanger support. A few specifics matter at the design stage:

• Countertop substrate. The countertop must be non-combustible. The enclosure walls below the countertop may be combustible only if the matching insulating liner (24-IL-C, 30-IL-C, or 36-IL-C) is installed.
• Countertop overhang. The front panel of the grill is designed to sit flush against the enclosure front wall. If the countertop extends beyond the front wall, the overhang must be cut flush with the front wall for the full width of the grill control panel; otherwise a gap will expose the forward portions of the left and right side firewalls.
• Substrate behind the front panel. When tile, stone, or other substrate is added to the front wall behind the front panel, the substrate plus countertop cutout depth must equal the front-to-back cutout dimension (19½″ for non-combustible enclosures). Substrate alongside the front panel needs ¼″ clearance on each side and below.
• Front air inlet. Do not block the air inlet along the bottom of the front panel. Front-to-back airflow is required for combustion and cooling.
• Wind orientation. Install the grill so the prevailing wind blows toward the front of the grill, not into the rear oven lid vent. A wind deflector is pre-installed at the rear vent for variable conditions.
• Drainage. If your enclosure design can collect water, add drainage cutouts at the bottom of the enclosure to prevent water accumulation.
• Service access. The front panel must remain removable for servicing.
• Hanger flange. Most AOG grill and accessory hangers measure approximately 1¾″ all around. Plan countertop side wall offsets accordingly: minimum 6″ countertop width from cutout edge to side wall inner dimension, or 8″ if the countertop has an overhang above the front panel.