Granitestone 16Qt Air Fryer (Big Boss) Review

Intro

The Granitestone 16Qt Large Glass Air Fryer (model 8605), often promoted as the "Big Boss," is a family‑sized countertop air fryer that leans into volume and visibility: a glass inner bowl, three cooking levels, and a claim to be Teflon‑free and free of "forever chemicals." The listing positions it as an all‑in‑one appliance for air frying, baking, roasting, grilling and toasting, with programmable controls and a large 16‑quart capacity. Owners praise the capacity and the results but also report real durability and safety tradeoffs related to the glass bowl and parts availability. This review walks through what the product actually is, how it performs in everyday use according to owner experience, where the risks are, and who should consider buying it (and who should skip it).

What it is / first look

At first glance the Granitestone 8605 is unmistakably built around a large, clear cooking chamber. The listing lists the inner material as glass and the outer material as "Granitestone," and the default color is Silver. Specs in the listing include a 16 quart capacity, item dimensions of 12.5" D x 16" W x 13.5" H, and an item weight of 14.7 pounds. The unit is described as programmable, with a built‑in digital control panel and touch control method, and the listing gives both a min temperature setting of 82.2 °C (which the bullet copy equivalently lists as 180°F) and a max temperature of 400°F. Electrical specs on the listing show both an Output Wattage of 1300 watts and a Wattage value of 1500; the listing includes both numbers.

The feature list claims 360° Air Circulation technology, three cooking levels for multi‑rack cooking, stainless steel racks, dishwasher‑safe removable parts, an auto‑clean function, and included accessories: a 50‑recipe cookbook, a frying rack, an instruction booklet, and tongs. The listing also makes a prominent material/health claim: it states the product is "Teflon‑Free & Made Without Forever Chemicals" and labels the product "Non Toxic" in the title and description. Treat those as listing claims — they come from the product copy rather than independent verification.

What you get in the box

• Air fryer unit (model 8605) with glass bowl and top assembly (top appears to house the heater/blower).
• Frying rack and stainless steel racks (listed in description).
• Instruction booklet and a 50‑recipe cookbook (listed as included).
• Tongs (listed as included).

Colors

Available colors may include:

• Silver

In daily use

Owners' experiences paint a clear picture of how the Granitestone 16Qt performs day‑to‑day: it cooks quickly, handles large volumes, and is generally easy to use — but it comes with behavior and handling quirks you need to know before you buy.

Cooking performance and capacity

Owner feedback consistently praises speed and food quality: multiple owners report fast cook times, moist insides with crisp exteriors, and the ability to cook a whole meal across the appliance's multiple racks. The listing supports those claims with a 360° circulation marketing line and a wide temperature range (listed as 180°F to 400°F in the bullets), which explains how it can be used for frying, baking, roasting, grilling and toasting.

Capacity is one of the product's biggest selling points. The listing states 16 quarts and three cooking levels; owners report that, with accessories like an extender ring bought separately, the practical capacity becomes very large — one owner even reports the extender ring made it possible to roast a 16 lb turkey. Note: the listing itself does not explicitly list an extender ring as included, and owners who have used extender rings often bought them or aftermarket accessories separately.

Controls and day‑to‑day handling

The listing describes the control method as touch with a built‑in digital control panel; owner notes also describe simple controls (some refer to two knobs in older notes, which suggests some variability in units or user perception). Owners repeatedly describe the controls as straightforward: time and temperature settings are easy to adjust. The listing also mentions a programmable feature set and an auto‑clean function; owners praise the wash/clean system and the dishwasher‑safe removable parts when cleaning.

Caution on weight and handling: owners frequently mention the glass bowl's heaviness and recommend careful handling. The unit's total item weight is listed as 14.7 pounds, and the glass inner bowl plus top assembly is heavier than comparable metal‑bodied air fryers. Several owners emphasize balanced handles and that you generally lift one piece at a time (bowl or top) when moving or storing the unit.

Accessories and modding

Out of the box you get racks and tongs and a cookbook, but owners who wanted more stacking, mesh, or rigid baskets looked to commercial foodservice parts vendors for inexpensive, durable accessories (pizza screens, wire baskets, steamer racks, and mesh baskets). Owners report that these aftermarket parts are often sturdier and cheaper than branded accessory packages, and some owners recommend specific third‑party items to prevent food from flying into the heating element (for example, using a pizza screen to protect kale chips from blowing into the heater).

Common owner workflows

• Family meals: owners say the unit routinely handles enough food for multiple people and can cook several items at once across the three levels.
• Batch dehydration: a subset of owners use it for dehydrating, reporting it can dehydrate fruit successfully when set up with mesh layers and good airflow.
• Single‑person or couple use: some owners find the unit still practical for two people and appreciate the leftovers potential.

Materials & build quality

What the listing says: inner material is glass, outer material is listed as Granitestone, included components list stainless steel racks, and product care instructions list dishwasher safe. The listing also asserts the unit is Teflon‑free and made without "forever chemicals," and markets the product as "Non Toxic" in several places.

Owner observations give a fuller picture. The glass bowl is praised for visibility — owners like being able to watch food as it cooks — but they also repeatedly call out the bowl's weight and fragility. Multiple owners report cracked glass bowls: one owner explicitly described the bowl cracking after food fell to the bottom while turning frozen food, and several other owners described damage or failure of the glass bowl over time. At least one owner noted that the manufacturer or seller sent a replacement bowl or a whole replacement unit after contacting customer service.

Fit and finish: owners describe the structure as "fairly well designed" and balanced for lifting, but they also point out limited parts availability as a build‑quality pain point. Owners seeking extra racks, extender rings, or replacement parts sometimes had to source parts from third‑party sellers or specialty commercial kitchen suppliers rather than from readily available OEM spares.

Safety considerations

Safety has two sides here: the product copy makes claims about chemical safety and the construction, and owner reports highlight real handling risks you should plan for.

Listing claims: the manufacturer/ listing claims the air fryer is "Non Toxic," "Teflon‑Free & Made Without Forever Chemicals," and includes dishwasher‑safe parts and an auto‑clean function. Treat those as product/marketing claims; the listing does not provide independent certification details.

Owner safety signals:

• Cracked glass bowls. Several owners reported cracked or cracked‑and‑continued use glass bowls. One owner specifically warned that frozen items that fall to the bottom when turning can cause the glass to crack. Another owner reported the bowl cracking, contacting customer service, and eventually receiving a replacement bowl or unit — showing the company may respond, but also that cracking is a known issue.
• Weight and lifting. The glass bowl is heavy; owners warn you need to be careful when lifting and cleaning the bowl, and to avoid sudden temperature shocks when washing (one owner recommends that you let the glass cool before using the wash function and to add hot water carefully because thermal shock could crack the glass).
• Electrical and motor failures. A few owners describe devices that stopped working early (one owner reported the unit dying on the first trial run), though replacements were issued in at least one documented case.
• Parts availability. The listing doesn't explicitly state parts support policies. Owners report that parts are not widely available for purchase, and that beyond common items like a halogen bulb or aftermarket rings, you may need to hunt on secondary markets for replacement racks, rings, or bowls. Limited spare‑part availability can complicate a repair if something breaks.

Kitchen safety recommendations based on those signals (practical, not regulatory): handle the glass bowl carefully, avoid dropping or letting heavy frozen items slam into the bottom, allow the bowl to cool before adding water to the wash system to reduce thermal shock, and keep a cautious eye for cracking or hairline fractures. If you need robust spare‑parts support as part of your purchase decision, factor in that owners report mixed availability and that some replacement parts were sourced from third‑party sellers or required direct contact with customer service.

Who this is for / who should skip

Use the next few subsections to match the product to typical kitchens and cooks.

Best for

• Families or groups who want to cook larger batches: the listing’s 16 quart capacity and three cooking levels, plus owner reports of roomy volume, make this a fit for those who cook for multiple people or like to make big batches.
• Cooks who want visible cooking: the glass inner bowl is repeatedly praised by owners for letting you watch progress without opening the unit.
• Buyers who prioritize Teflon‑free marketing: the listing emphasizes the unit is Teflon‑free and made without forever chemicals; if that is a primary motivator, this model claims to meet it (again, a listing claim).
• People comfortable sourcing accessories: owners often expand the unit’s utility with aftermarket pizza screens, mesh baskets, steamer racks, and extender rings. If you enjoy customizing with third‑party parts, this unit is flexible.

Who should skip or be cautious

• Anyone who needs rock‑solid glass durability: if you want a unit that minimizes the risk of bowl cracking, take owner crack reports seriously and consider metal‑bodied alternatives.
• Buyers who require easy OEM replacement parts: owners report limited parts availability and sometimes had to source items from secondary markets; if guaranteed local parts availability is a must, this is a red flag.
• People with very small counters: the unit is roomy and heavy — the listing dimensions and item weight suggest you should measure your counter space and storage before buying.
• Shoppers who expect detailed third‑party safety certifications: the listing makes material claims but doesn’t list certifications in the product facts, so if you need certified materials, verify the current manufacturer documentation before purchasing.

Verdict

The Granitestone 16Qt Glass Air Fryer is a distinct offering in the crowded air‑fryer space because it pairs a large 16‑quart visible cooking chamber with multi‑rack cooking and a marketing focus on being Teflon‑free and chemical‑free. Owners repeatedly praise its cooking speed, capacity, and the convenience of dishwasher‑safe parts and an included cookbook. If your top priorities are volume, being able to watch food cook, and a non‑Teflon marketing message, this model delivers value.

However, owner feedback also supplies real cautionary notes: the glass bowl is heavy and has cracked for some users, parts are not always easy to source, and a small number of units reportedly died early in service (with replacements issued in some cases). Those are practical safety and longevity considerations you should factor into the purchase decision.

Check before you buy

Use this checklist to verify the current listing and align expectations:

• Confirm the exact wattage on the current listing (the product facts show both 1300W output and 1500W wattage).
• Measure your counter and storage: the listed dimensions (12.5" D x 16" W x 13.5" H) and item weight (14.7 lb) matter for tight kitchens.
• If you plan to cook frozen items or heavy ingredients, plan for careful loading/unloading and avoid impacts to the glass bowl.
• Check the current manufacturer or seller policy on replacement parts and glass bowl availability before purchasing, especially if spare parts are important to you.
• If chemical‑free materials are essential, verify the current listing/manufacturer documentation for the most up‑to‑date material claims and any certifications.

Overall: good value for large‑batch home cooks who accept the tradeoffs of a heavy glass chamber and are comfortable sourcing or waiting for parts if needed. For buyers who want metal‑bodied durability or guaranteed parts support, a different platform may be a better long‑term fit.

FAQ

Q: How large is this air fryer and will it fit on my counter?

A: The listing gives a 16 quart capacity and item dimensions of 12.5" D x 16" W x 13.5" H, with an item weight of 14.7 pounds. Measure your countertop clearance and storage space against those dimensions before you buy.

Q: Is the unit Teflon‑free or non‑toxic?

A: The listing describes the product as "Non Toxic" and explicitly states it is "Teflon‑Free & Made Without Forever Chemicals." Treat those as manufacturer/listing claims and verify the current listing or manufacturer documentation if you need third‑party confirmation.

Q: What are the temperature ranges and power requirements?

A: The product bullets list a temperature range from 180°F to 400°F, and the specifications show a min temperature setting of 82.2°C and a max of 400°F. The listing shows two wattage numbers: Output Wattage 1300 watts and Wattage 1500; review the current listing for the version you plan to buy and confirm which is in effect for that SKU.

Q: Can I put parts in the dishwasher? How do I clean it?

A: The listing specifically states "Dishwasher Safe" in the product care instructions and lists removable parts as dishwasher safe in the feature bullets. Owners also praise the wash/auto‑clean system but advise letting the glass cool before using the wash function to reduce risk of thermal shock.

Q: Are replacement parts or accessory rings available if something breaks?

A: The listing doesn't give explicit details on spare parts availability. Owner feedback indicates parts aren't always easy to find; some owners sourced rings, racks and accessories from third‑party or commercial kitchen suppliers, and at least one owner successfully obtained a replacement bowl or unit via customer service. If parts support is critical, check current seller/manufacturer policy before buying.

Q: Is it safe to cook frozen foods or heavy items in the glass bowl?

A: Owners warn about the risk of impact on the glass bowl: one owner reported a bowl cracking after a frozen piece of food fell to the bottom when turning items. The listing does not provide additional cautions; owners recommend careful loading/unloading and letting glass cool before washing to avoid thermal shock.

Q: Can this unit roast a large turkey or be extended for bigger roasts?

A: The listing lists a 16 quart capacity and three cooking levels but does not specifically promise a roast turkey. Some owners report using an extender ring (an accessory purchased separately) that increased the working volume enough to roast very large birds — one owner mentioned roasting a 16 lb turkey with an extender ring. Because the extender ring is not shown as included in the official components list, treat that as aftermarket owner experience rather than a standard included capability.