Short verdict: The Proscenic T21 is an older but still capable single-basket smart air fryer with a published 5.5-litre/5.8-quart capacity, 1,700-watt heater, eight presets and app control. Its strongest case is convenience: the touchscreen, preheat and keep-warm functions work without the app, while Wi-Fi adds recipe and remote-control features. Its main limitations are the bulky footprint, a single cooking zone and regional voltage versions that are not interchangeable.
How this review was produced: This is a specification-led assessment, not a hands-on test. We checked Proscenic’s current air-fryer comparison page and the manufacturer-hosted T21 manual on 24 October 2026. The T21 is no longer prominent in Proscenic’s current shop, so this guide is particularly useful for remaining stock, refurbished units and second-hand purchases.
Proscenic T21 specifications
| Model | Proscenic T21 Smart Air Fryer |
|---|---|
| Published capacity | 5.5 litres / 5.8 US quarts |
| Rated power | 1,700 W |
| Published temperature range | Current comparison page: 80–205°C / 180–400°F; manuals vary slightly by regional version |
| Controls | Full touchscreen plus Proscenic app |
| Programs | Eight one-touch presets plus a custom setting |
| Other functions | Preheat, keep warm, timer, shake reminder, app recipes and voice-assistant support |
| Basket | Aluminium with a non-stick coating |
| Dimensions | Approximately 314 × 316 × 326 mm |
| Net weight | Approximately 5.9 kg |
Those figures identify a relatively large countertop appliance, not a compact travel model. Allow working room around the air inlet and hot-air outlet as well as space to pull the drawer forward. Before buying, compare the dimensions with the usable depth beneath your wall cupboards—not just the empty area on the worktop.
Our air-fryer size guide explains why basket shape and available cooking surface matter as much as the litre figure.
Capacity: what 5.5 litres means in practice
Proscenic describes the T21 as suitable for three to five people. Treat that as a maximum-use scenario rather than a guarantee that every meal for five will fit. It is one basket, so food that needs different temperatures or cooking times must be cooked in stages.
The T21 should be most comfortable with two to four portions of a main item, a larger batch of vegetables or a side for a family meal. Crisping depends on exposed surface area. A deep pile can technically fit inside the basket but will need more shaking and may brown less evenly than a loose layer.
The best way to judge a used unit is to inspect the basket itself. Confirm that it is the original T21 basket, that the release mechanism works and that the coated surface is not deeply scratched, blistered or peeling.
Eight presets and manual control
The T21 manual identifies preset shortcuts for fries, steak, chicken, cake or cupcake, shrimp, pizza, fish and bacon. A preset is simply a stored starting time and temperature. It cannot measure thickness, starting temperature or actual doneness, so the first cook should always be checked early.
| Control | What it does | Practical advice |
|---|---|---|
| Preset | Loads a programmed time and temperature for a food category | Adjust for portion size and check before the default time ends |
| Custom | Lets you choose the cooking time and temperature | Use this when following packet directions or adapting an oven recipe |
| Preheat | Warms the chamber and basket before food is added | Useful for short cooks and more repeatable browning |
| Keep warm | Holds cooked food at a low setting for a limited period | Quality still declines; it is not long-term food storage |
| Shake reminder | Prompts you to redistribute the basket contents | Shake small pieces or turn larger items for more even colour |
| App control | Provides recipes and remote access to supported controls | Stay close enough to supervise a high-heat cooking appliance |
For meat, poultry and fish, use an instant-read thermometer and follow the applicable food-safety guidance for your country. Time alone cannot confirm that the centre is safe.
Smart functions: useful, but not essential
The T21’s cooking controls remain available on the appliance, so a failed Wi-Fi connection does not make it unusable. The app is mainly valuable for recipes, saved settings and remote monitoring. Proscenic also advertises voice-assistant support, including Alexa.
Smart setup normally requires a compatible 2.4 GHz Wi-Fi network, Bluetooth or local-network permission during pairing, and a current version of the Proscenic app. Router security changes, app updates and cloud-service availability can affect an older connected appliance. Buy the T21 only if you would still be satisfied using the touchscreen by itself.
Remote control should not be confused with unattended cooking. Do not leave perishable food sitting at room temperature for a delayed start, and do not run a hot appliance while nobody is available to respond to smoke, an obstruction or a power problem.
Regional voltage matters
T21 manuals exist for both North American and European/UK versions. North American examples are labelled for 120 V, 60 Hz; European and UK versions are commonly labelled for 220–240 V, 50 Hz. Both may be advertised simply as “T21.”
Check the rating label on the appliance before connecting it. A plug-shape adapter does not convert voltage, and a 1,700-watt heating appliance places a substantial continuous load on a transformer. The safer choice is a T21 version made for the local electricity supply.
If you are comparing household circuit requirements, see our air-fryer wattage guide.
A safe first-use routine
- Confirm the rating label. Match the appliance voltage and frequency to the local supply.
- Inspect the cord, plug, drawer and coating. Do not use the unit if the cord is damaged or the basket mechanism does not close properly.
- Wash the removable parts. Use warm water, ordinary dish soap and a soft sponge, then dry them completely.
- Place the unit on a stable, heat-resistant surface. Keep the inlet and exhaust clear and leave ventilation space.
- Run the initial cycle described in the manual. A brief manufacturing smell can occur with a new heating appliance; stop if there is persistent smoke, sparking or an electrical smell.
- Start with a modest batch. Learn how quickly the T21 cooks before filling the basket more deeply.
Do not pour oil into the outer drawer as if it were a deep fryer. Lightly coating food can help browning, but pooled oil increases smoke and cleaning difficulty. Never place loose paper or foil in the empty basket during preheating because the fan can lift it toward the heating element.
Cleaning and coating care
Let the T21 cool and unplug it before cleaning. Remove crumbs and grease from the basket and drawer after each use; accumulated residue is a common cause of odour and smoke.
Manufacturer material for the T21 has described the removable basket components as dishwasher safe, but manual revisions and regional packages can differ. Hand washing with a soft sponge is the conservative approach for preserving the non-stick coating. Avoid metal utensils, abrasive pads and harsh oven cleaner.
Wipe the powered main unit with a damp cloth only. Never immerse it or rinse water into the air inlet, display or heating chamber. If the coating becomes deeply scratched or starts to peel, stop using the basket until a confirmed T21-compatible replacement is available. Our cleaning guide and coating guide cover the process in more detail.
Troubleshooting the Proscenic T21
The app cannot find the air fryer
Confirm that the phone is connected to a 2.4 GHz Wi-Fi network, local-network and Bluetooth permissions are allowed, and the T21 is in pairing mode. Move temporarily closer to the router and avoid guest networks that isolate connected devices.
The appliance will not start
Push the drawer fully into the main unit and check the wall outlet. If the display shows an error or the unit repeatedly stops, unplug it, let it cool and consult Proscenic support rather than opening the housing.
Food is pale or uneven
Reduce the load, spread pieces more loosely and shake or turn them during cooking. Moist food should be patted dry before a small amount of oil is applied.
There is white smoke
Fat or residue may be reaching a hot surface. Stop cooking if necessary, let the appliance cool and clean the drawer and chamber. Very fatty foods may need a smaller batch and more frequent grease removal.
There is an electrical or burning-plastic smell
Switch off and unplug the appliance. A brief first-use odour is different from persistent smoke, visible damage, sparking or a hot plug. Do not continue using a questionable unit.
Used-buying checklist
- Verify the label says Proscenic T21 and matches your local voltage.
- Confirm the original basket and removable inner component are included.
- Inspect the non-stick surface, drawer rails and handle release mechanism.
- Check the plug, cord and cord entry for heat damage or repairs.
- Power it on with the seller’s permission and test the touchscreen and drawer detection.
- Assume smart features may depend on the current app and cloud service; value the machine primarily as a touchscreen air fryer.
- Check that the appliance can sit with adequate ventilation in your intended kitchen position.
Who should buy the T21?
It can still make sense for: people who want a roomy single basket, preheat and keep-warm controls, recipe-led app features and a lower used or clearance price than a current smart model.
Look elsewhere if: you need two independent cooking zones, a compact footprint, guaranteed long-term app support, a viewing window or a model currently sold with straightforward local parts availability.
The T21’s lasting value is its usable manual control, not its cloud connection. If the basket and coating are in good condition and the voltage matches your country, it remains a practical 1,700-watt air fryer even when the smart features are ignored.
Frequently asked questions
Is the Proscenic T21 5.5 litres or 5.8 quarts?
Both figures describe the same published basket size: 5.5 litres is approximately 5.8 US quarts.
Does it work without Wi-Fi?
Yes. Core time, temperature, preset, preheat and keep-warm controls are available on the touchscreen. Wi-Fi is an optional convenience layer.
How many presets does it have?
Proscenic lists eight one-touch presets plus a custom setting. The presets are starting points and do not sense food doneness.
Can I use a European T21 in the United States?
Not directly. European units are generally 220–240 V, while North American units are 120 V. Buy the correct regional version rather than relying on a plug adapter.
Is the basket dishwasher safe?
Some Proscenic T21 material says the removable components are dishwasher safe, but regional manuals may differ. Check the manual supplied with your exact unit. Hand washing is the gentler default for the coating.
Is the T21 still a good buy?
It can be, if the price reflects its age, the basket coating is sound and you are comfortable using the touchscreen if app support changes. Compare it with current models if warranty and replacement parts matter more than a low purchase price.
Official sources checked
- Proscenic current air-fryer comparison
- Proscenic official manual library
- Proscenic T21 multilingual user manual
Sources checked 24 October 2026. App availability, cloud services and regional specifications can change; confirm the rating label and current support information before purchase.