Broilmaster Premium Series Gas Grill Size & Mounting Guide

Premium Series sizing has two parts: pick the grill head, then pick the mounting. The measurements that matter depend on the mounting type:

• Built-in installation (using the BHAX2 stainless steel built-in kit): measure the rough opening width, depth, and drop into the island. The head sits in the BHAX2 sleeve, which sets the cutout dimensions and protects the surrounding combustible framing.
• Cart installation (PCB-1, DCB-1, or PSCB-1 cart): measure the patio footprint where the cart will sit, plus the 16-inch side and 18-inch rear clearance to any combustible material. No island cutout needed.
• In-ground post installation (SS48-G or BL48-G): measure the post location and confirm clearance to combustible structures. The post anchors below the patio surface in concrete; you'll need a hole approximately 12″ diameter × 18-24″ deep depending on local frost-line code.
• Patio post installation (SS26-P or BL26-P): measure the bolt-down location on the existing patio. The cast iron base bolts directly to the slab — no concrete pour required.

For all four mountings, also confirm the clearance envelope: 16 inches from each side of the grill to any combustible material, 18 inches from the back of the grill to any combustible material, and zero combustible overhead (no carport, awning, covered porch, or overhang).

Premium Series grill heads are sold separately from their mounting bases — the head decision and the base decision are independent. Package SKUs (P3PK5/N, P3PK6N, P3PK7N) bundle a head and a base at a coordinated price for the most common configurations.

The Broilmaster BHAX2 stainless steel built-in kit fits the P3X (and H3X) grill heads for installation into a custom outdoor kitchen island. The built-in kit provides the cutout sleeve, support flange, and necessary hardware. Use of the BHAX2 also opens compatibility with other Broilmaster stainless steel built-in components: the Door Kit (storage door access), the Tilt-Out LP Tank Door (for built-in propane installations), and the Vent Register Kit (required for built-in propane installations).

For built-in island installations, the BHAX2 stainless steel built-in kit is the source of truth for cutout dimensions. The BHAX2 ships with a dedicated installation document that includes the rough-opening drawings — confirm with your dealer or Broilmaster directly before you frame the island opening.

For non-built-in installations (cart, in-ground post, patio post), there is no rough opening to cut — you only need to confirm the surface footprint of the cart base or post anchor and the surrounding clearance envelope.

For planning the surrounding island countertop, cart shelving, or post-mount footprint:

Per Broilmaster's installation requirements, the grill must maintain the following minimum clearances from the body of the grill to any combustible material:

Combustible materials include — but are not limited to — wood-frame walls, fences, patio furniture, the wall of the home, vinyl siding, wood decking, and any covered overhead structure. Stone, masonry, concrete, and properly rated stainless steel are not combustible.

The clearance envelope applies regardless of mounting type. A cart-mounted Premium grill on a patio still needs 16 inches to each side and 18 inches to the rear; a post-mounted grill in an open patio still needs the same envelope to any combustible structure within range.

Per the Broilmaster Premium owner's manual, the natural gas inlet pressure at the grill should be set to 7.0 inches water column (7.0″ WC). Connect cart-mounted natural gas grills to a pre-installed gas supply line using the 12-foot flexible hose and quick-disconnect kit available from the dealer. Built-in installations should run a hard-piped supply with a manual shutoff valve isolated from the grill before any leak test.

Total natural gas BTU demand:

• P3 head (P3XN, P3XFN, P3PK5N, P3PK6N, P3PK7N): 40,000 BTU/hr at peak.
• P4 head (P4XN, P4XFN): 40,000 BTU/hr at peak.

Both head sizes pull the same 40,000 BTU on natural gas — the difference between P3 and P4 is cooking area, not heat output. Size the supply line based on the peak demand of the grill (40,000 BTU) plus any other appliances drawing from the same supply (range, water heater, dryer, fire feature). Consult a licensed gas plumber for the appropriate pipe diameter and length.

The Premium propane configuration uses a 20-pound LP cylinder. For cart-mounted setups, the cylinder mounts in the cart's cylinder bracket. For built-in setups, the cylinder lives in a code-compliant cylinder enclosure inside the island; the Broilmaster Tilt-Out LP Tank Door is the matching access component. Per the manual, do not use a propane gas cylinder with a capacity greater than 20 pounds with this grill.

If the grill is installed in an island enclosure with a propane cylinder, the enclosure must include vent register openings — Broilmaster sells a Vent Register Kit as a stainless steel built-in component. The cylinder must be arranged upright for vapor withdrawal, and the enclosure must remain free of obstructions to combustion-air ventilation.

The grill and its individual shutoff valve must be disconnected from the gas supply piping system during any system pressure testing at test pressures in excess of 1/2 PSIG. The grill must be isolated from the gas supply piping system by closing its individual manual shutoff valve during any pressure testing of the gas supply piping system at test pressures equal to or less than 1/2 PSIG.

The 16-inch side and 18-inch rear clearances apply to combustible framing inside the island. If you build the island with non-combustible framing — masonry block, concrete, prefabricated stainless steel — these clearances do not apply to the framing itself, but the surrounding combustibles around the island still need the same envelope. Most prefab outdoor kitchen islands are designed to non-combustible specs from the supplier.

The BHAX2 built-in kit provides the stainless steel sleeve that protects the head's heat zone from the surrounding island construction, but does not replace the clearance requirement for combustible materials in the broader install location.

For built-in propane installations, plan a code-compliant access door for cylinder swap-out. The Broilmaster Door Kit is the stainless steel access panel; the Tilt-Out LP Tank Door is the integrated cylinder access option. Both carry the Limited Lifetime warranty against rust-through alongside the rest of the stainless built-in components.

For propane installations inside an island enclosure, vent register openings are required at the bottom and top of the enclosure — the bottom vent allows propane (which is heavier than air) to escape if a leak occurs, and the top vent allows combustion air to circulate. The Broilmaster Vent Register Kit is the stainless steel matching-pair register accessory for built-in Premium configurations.

The Premium head is heavy-duty cast aluminum with stainless steel internals. Exact dry shipping weights are not in the current Premium owner's manual we have on hand; expect a freight class shipment with palletized delivery. Plan island countertop support around granite/quartz/concrete typical loading — the head weight is well within standard outdoor-kitchen counter capacity but the rough opening (when using the BHAX2 built-in kit) reduces effective span, so consider counter overhang and unsupported edges around the cutout.