What to know first
- 36-inch, five-burner stainless steel gas cooktop with continuous cast iron grates.
- Center burner is rated at 16,000 BTU for high-heat cooking and faster boiling.
- ExtraLow Select simmer cycles the flame on and off to hold very low heat with less babysitting.
- Electronic re-ignition can relight a burner automatically if the flame goes out.
- Fit matters: the overall size and cutout requirements are specific, not “universal 36-inch.”
- Expect more detailed cleaning around the star-shaped burner caps than on simpler burner designs.
What the Thermador SGSX365TS is
The Thermador SGSX365TS is a 36-inch drop-in gas cooktop in Thermador’s Masterpiece series. It gives you five sealed burners on a stainless steel surface, with metal knobs up front and continuous cast iron grates across the top.
The headline features are a 16,000 BTU center burner for high heat and Thermador’s ExtraLow Select simmer on two burners. ExtraLow is designed for very gentle heat by cycling the flame on and off, which is different from a typical gas simmer that just turns the flame down and hopes it stays steady.
This model also includes electronic re-ignition, which is there to keep cooking from getting interrupted if a flame goes out. It is aimed at shoppers who want a premium built-in cooktop setup (often paired with wall ovens) and who cook enough to notice the difference between “kind of simmers” and “actually holds low heat.”
Why it stands out
ExtraLow Select is the reason to pay attention to the Thermador SGSX365TS. Instead of relying on a tiny, always-on flame, ExtraLow cycles the burner on and off to maintain very low temperatures. In real cooking terms, that’s what helps you keep a delicate sauce from scorching, hold a pot at a gentle simmer, or keep food warm without constant stirring.
On the other end, the 16,000 BTU center burner gives you a dedicated high-heat zone for boiling and searing. You do not have to sacrifice your best burner just to keep a pot of water moving quickly, and you still have four other burners available for sides and sauces.
The five-burner layout and 36-inch width matter if you cook with larger cookware or you regularly have multiple pans going. This cooktop is built around that “big meal” workflow, where crowding and awkward pan placement can ruin an otherwise good cooktop.
Thermador’s star-shaped burner design is part of the identity here. The shape is meant to distribute flame broadly under the pan, and it gives the cooktop a distinctive look. Just know that the same design can be more involved to clean than simpler round burner caps.
What it is like to own
Day to day, this cooktop is about control and space. You get one knob per burner, and the continuous grates let you slide cookware across the surface instead of lifting it. That sounds small until you are moving a heavy stockpot or repositioning pans mid-cook.
ExtraLow simmer changes how you handle low heat on gas. Because the flame cycles on and off, you may notice that behavior while cooking. That cycling is intentional and is what allows the cooktop to hold very low heat without you constantly adjusting the knob.
Cleaning is the ownership reality check. The cooktop has sealed burners to help keep spills from getting into the burner box, and the burner caps and knobs are removable for cleaning. But the star-shaped burner caps can take more time to scrub than basic round designs, so this is not the best match for someone who wants the quickest cleanup possible.
Installation and fit are also part of ownership. This is a 36-inch class cooktop, but the cutout is specific. If you are replacing an older cooktop, matching the cutout dimensions and clearances is what determines whether this is an easy swap or a countertop project.
What to know before you buy
First, confirm fit before you fall in love. The Thermador SGSX365TS has published overall dimensions and a specific cutout requirement. A “36-inch cooktop” label does not guarantee it will drop into your existing opening, especially if you are replacing an older model from a different brand.
Second, plan for ventilation like you mean it. Gas cooking produces heat, steam, and combustion byproducts, and a powerful burner encourages high-heat cooking that can overwhelm a weak hood. A strong cooktop can be frustrating in a kitchen that cannot clear smoke and odors well.
Third, be honest about your cleaning tolerance. This cooktop’s star burner design is a big part of what you are paying for visually, but it can be harder to clean than simpler burner shapes. If you know you will resent detailed scrubbing, choose a design that better matches your habits.
The specs that matter
You get more room for large pans and multi-pan meals, but you also need to confirm it fits your counter and cabinet base.
This is the countertop opening the cooktop needs. Matching the cutout is often the difference between a straightforward replacement and countertop work.
Depth affects how the cooktop sits in your counter and how much room you have behind it near a backsplash or rear wall.
Five burners on a 36-inch surface is a practical layout for cooking a full meal at once, especially when you want a dedicated high-heat burner plus space for sides.
Higher BTU output is what you feel when you are trying to boil water faster or get a pan hot enough for a hard sear.
This is the feature that helps with delicate simmering and keeping sauces warm without scorching or constant attention.
It reduces interruptions during cooking and helps you avoid realizing too late that a burner went out under a pot.
Even gas cooktops need electricity for ignition and controls. You want the right outlet and circuit available before install day.
Who this product fits
You cook sauces that scorch easily
The Thermador SGSX365TS is a strong match because ExtraLow Select is built for very low heat by cycling the flame. That’s the kind of control that helps with marinara, gravy, custard-style sauces, or keeping food warm without burning the bottom.
You host and routinely use multiple big pots
A 36-inch, five-burner layout with continuous grates gives you room to run a pasta pot, a sauté pan, and a sauce pot at the same time without feeling cramped. Sliding cookware across the grates also helps when the cooktop is busy.
You want one burner that is clearly the high-heat workhorse
The 16,000 BTU center burner is the dedicated spot for fast boiling and high-heat cooking. It’s the burner you reach for when you want quick results, while the other burners handle the rest of the meal.
You are replacing an existing built-in cooktop in a remodel
This model has clearly stated overall dimensions and cutout requirements, which helps you plan the countertop opening and avoid guessing. Measure your current cutout carefully before committing.
What else to compare
If the Thermador SGSX365TS is more luxury than you need, or you want a different size, these are the directions that make the most sense.
Thermador SGSX365TS FAQ
Is the Thermador SGSX365TS a good choice if I care most about simmering?
Yes. Its ExtraLow Select simmer is designed to hold very low heat by cycling the flame on and off, which is exactly what you want for delicate simmering and keeping sauces warm without scorching.
How powerful is the Thermador SGSX365TS for boiling and searing?
It has a 16,000 BTU center burner (natural gas rating listed). That dedicated high-heat burner is the one you will use for faster boiling and high-heat pan cooking.
Will the Thermador SGSX365TS fit any 36-inch cutout?
No. “36-inch” is a width class, not a universal opening. The required cutout is 34 15/16 inches wide by 19 1/8 inches deep, so measure your existing opening and compare before you buy.
Does a gas cooktop like the Thermador SGSX365TS need electricity?
Yes. This model lists 120V and 15A electrical requirements for ignition and operation. Plan for both the gas hookup and the correct electrical supply.
Is the Thermador SGSX365TS easy to clean?
It has sealed burners and removable parts like knobs and burner caps, which helps. But the star-shaped burner caps can be more time-consuming to clean than simpler round designs, so it depends on your tolerance for detail cleaning.
Does the Thermador SGSX365TS have smart features like Wi-Fi?
No. This cooktop is knob-controlled and does not list Wi-Fi or Bluetooth connectivity.
Should you buy the Thermador SGSX365TS?
Buy the Thermador SGSX365TS if you want a premium 36-inch gas cooktop that does not force you to choose between high heat and real simmer control. The 16,000 BTU center burner covers the fast-boil and sear jobs, and ExtraLow Select is the feature that makes low heat feel more predictable for everyday cooking.
Skip it if you know you will hate cleaning around the star-shaped burner caps, or if your cutout does not match the required opening. But if your kitchen can support the install and you cook enough to appreciate a wide heat range, the Thermador SGSX365TS is a confident, practical upgrade.