Sunstone 28" 3-Burner Built-In Gas Grill - SUN3B
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SKU: SUN3B

Sunstone 28" 3-Burner Built-In Gas Grill - SUN3B

★★★★★4.6 · 5 reviews
$2,423.00
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Grill Jacket
Vents
Every Grill or Side Burner requires at least two vents installed in your outdoor kitchen island: High Position for Natural Gas or Low Position for Liquid Propane.
View warranty
Free Shipping to 48 States
Designed & Engineered in USA

Key features

  • Three up to 20,000 BTU 304 stainless steel burners, up to 60,000 BTU total
  • 484 sq. in. cooking surface
  • 3/8" stainless steel grates
  • Electronic ignition
  • Double-wall hood with temperature gauge
  • 304 stainless steel, edges with no seams
  • Cut out: 25" W x 21.75" D x 10.875" H
Description

The Sunstone 28" 3-Burner Built-In Gas Grill (SUN3B) is a heavy-duty grill for an outdoor kitchen island, sized for everyday barbecues and entertaining. It runs on natural gas or propane.

Three 304 stainless steel burners at up to 20,000 BTU each give up to 60,000 BTU total, so you can sear over high heat on one side and cook ribs slower on another. The cooking surface is 484 sq. in. on heavy-duty 3/8" stainless steel grates. Electronic ignition starts it quickly, and the double-wall hood has a built-in temperature gauge.

The grill is 304 stainless steel with edges that have no seams, which helps it resist corrosion. It is 28" wide.

NameSunstone 28" 3-Burner Built-In Gas Grill - SUN3B
Item No.SUN3B
SeriesPro-Sear Gas Grills
Product size28" W × 27" D × 26" H
Specifications
Dimensions28" W × 27" D × 26" H
Burners3
Burner Type304 stainless steel I-burners
Total BTUs60,000
Cooking Surface484 sq. inch
Cooking Grates3/8" 304 stainless steel
Fuel TypeNatural gas or propane
IgnitionElectronic
Material304 Stainless Steel
InstallationBuilt-in
WarrantyView warranty
Compare models

Comparing with 4 comparable models: same product family, type and price range.

Compare5 models
Price
$2,423.00
$2,623.00
$2,861.00
$3,111.00
$3,736.00
SKU
SUN3B
SUN3BIR
SUN4B
SUN4BIR
SUN5BIR
Width
28"
28"
34"
34"
42"
Depth
27"
27"
27"
27"
27"
Height
26"
26"
26"
26"
26"
Burners
3
3 Main, 1 Infrared Rear
4 Main Burners
4
5
Burner Type
304 stainless steel I-burners
Stainless steel I-burners plus one infrared rotisserie back burner
304 stainless steel I-burners
Stainless steel I-burners plus one infrared rotisserie back burner
Stainless steel I-burners plus one infrared rotisserie back burner
Total BTUs
60,000
3 x up to 20,000 BTU
80,000
80,000
100,000
Cooking Surface
484 sq. inch
484 sq. inch
768 sq in
768 sq in
Not listed
Cooking Grates
3/8" 304 stainless steel
3/8" 304 stainless steel
304 stainless steel
3/8-inch 304 Stainless Steel Rods
3/8-inch 304 stainless steel rods
Fuel Type
Natural gas or propane
Natural gas or propane
Natural gas or propane
Natural gas or propane
Natural gas or propane
Ignition
Electronic
Electronic ignition
Electronic Push-Button (AA Battery)
Electronic
Electronic
Material
304 Stainless Steel
304 Stainless Steel
304 Stainless Steel
304 Stainless Steel
304 Stainless Steel
Installation
Built-in
Built-in
Built-in
Built-in
Built-in
Infrared Burner BTUs
Not applicable
Up to 15,000 BTU
Not applicable
Up to 15,000
Up to 15,000
Warranty
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Documents (4)
SUN3BPDF
Sunstone Grill Manual (2019)PDF
Sunstone Grill LP to NG ConversionPDF
Grill Igniter Assembly GuidePDF

All product guides & documentation →

Warranty

Warranty

Coverage depends on the product. See the warranty page for the full terms.

View warranty

Shipping & returns

Shipping & Delivery

All orders ship free to the 48 contiguous United States.

Larger (freight) shipments are curb-side only. A signature and possibly assistance may be required for unloading. We will work with you to arrange a delivery date and time, but the final details will be between you and the freight carrier.

IMPORTANT: ALL LTL DELIVERIES ARE CURBSIDE UNLESS WHITE GLOVE FEES ARE PAID. All reports of damage must be made within 3 business days after delivery.

Receiving Your Shipment

When the shipment arrives, please do the following:

  • Inspect every box carefully before signing. There is no such thing as damage that is too small: dents, tears, crushed corners, punctures, or scuffs should all be noted.
  • Take clear photos of any box that shows damage.
  • On the delivery receipt, write down exactly how many boxes have visible damage. If it is electronic, have the driver show you where to notate the damage. Before handing it back, take a photo of the document showing your notation.

After the driver leaves, please immediately open and inspect the items themselves. If you find any damage, contact us with the following:

  • A photo of the item unboxed with the damage visible
  • A close-up photo of the actual damage
  • A photo of the delivery document where you noted the box damage

These steps ensure we can file a claim quickly and get any replacement parts or items to you without delay.

Returns & Exchanges

Returns are accepted within 60 days of original purchase, in original packaging and unused, for a full refund minus a 15% Restocking Fee.

We recommend insuring products when shipping back to us. Returns will be rejected if the product is received damaged.

Full Shipping Policy → · Return Policy →

Customer reviews

4.6
★★★★★
5 reviews
5★3
4★2
3★0
2★0
1★0

About our reviews: they come from verified direct customers and from our authorized dealer network, including Home Depot, Lowe's, Amazon and other Sunstone dealers.

Gerald O.★★★★★September 18, 2016
A beast of a grill

This grill is a beast. You can tell right away it's heavy duty, and it fit perfectly in my island. Burners heat up fast and even, so searing steaks is easy. Really impressed with the quality and how it cooks.

Tara J.★★★★★August 13, 2019
Great addition to my patio

I'd wanted a built-in grill for ages and this one didn't disappoint. Install was straightforward for my contractor and it looks sleek in my outdoor space. Love cooking on it, everything comes out great.

Ben I.★★★★☆August 17, 2018
Solid grill, minor nitpicks

Overall a very solid 3 burner grill for the price. Heats up well and feels durable. Only small complaint is the igniters can be a little finicky sometimes, but once it's lit it works great. Still happy with it.

Stan C.★★★★☆May 14, 2026
Cooks great, easy to fit in

Exactly what I needed for my new outdoor kitchen. Fit right in and you can see the build quality. Three burners give plenty of power for family get togethers, though I wish it had a dedicated sear zone. Still a great grill.

Fernando J.★★★★★October 11, 2016
Great quality, cooks great

This grill has made entertaining outside so much better. Heat is consistent across all three burners, no cold spots, and I've cooked everything from burgers to delicate fish with great results.

Questions & answers

5 questions answered

Q
How hard is this grill to clean after a big cookout? Any products or tips to keep it looking good?Asked by Sunstone Support Team
A
It's pretty easy since it's stainless. Brush the grates with a good grill brush after each use while they're still warm. For the outside, mild dish soap and water with a soft cloth keeps the stainless shiny. Always wipe with the grain, and don't use abrasive cleaners or steel wool, they'll scratch it.
Sunstone Metal Products support team
Q
For the price I want this grill to last. What's it made of and how does it hold up?Asked by Sunstone Support Team
A
It's mostly commercial-grade 304 stainless steel, which is very durable and resists rust and corrosion even in tough outdoor conditions. That includes the burners and cooking grates, so with some care it'll keep performing for years. It makes a reliable centerpiece for an outdoor kitchen.
Sunstone Metal Products support team
Q
What's the warranty on this grill? If a burner or igniter acts up, how do I get help?Asked by Sunstone Support Team
A
Coverage details are on our warranty page. If you have an issue with a burner, the igniter or anything else, contact us with your order number and we'll help with parts or troubleshooting.
Sunstone Metal Products support team
Q
I'm upgrading my old grill. Will this 28 inch drop into my existing cutout, or will I need custom work?Asked by Sunstone Support Team
A
It's made for a simple built-in install. It usually fits a cutout around 27-1/4" W x 10-1/4" H x 21-1/2" D, which is pretty standard for 28 inch grills. Check your current cutout against the exact specs to make sure it fits, but it usually works well as a replacement.
Sunstone Metal Products support team
Q
What gas hookup does this grill use? Can I switch between natural gas and propane later?Asked by Sunstone Support Team
A
It comes in both natural gas and propane versions, and you pick the one you need when you order. Conversion kits exist for some other grills, but it's best to buy the right fuel type from the start, since converting a built-in grill can be complicated and may void your warranty if a certified pro doesn't do it.
Sunstone Metal Products support team
Sunstone 28" 3-Burner Built-In Gas Grill - SUN3B$2,423.00
Free Shipping to 48 States