JustBrisk Solar Roof Ventilation Fan — Zero-Emission Solar Attic Fan & Solar Air Vent with Ultra-Low-Light Activation, Bifacial Solar and 24/7 Hybrid Power

Ultra-Low-Light Activation Bifacial Solar + MPPT Zero Emission
24/7 Hybrid Power UAV-Grade Aerodynamics Patented Design

Genuine JustBrisk, Genuine Power.

Inside the Breeze

Engineered to sip sunlight,
built to move air.

Built-in MPPT

Ultra-low-light activation — maximize every ray of sunlight.

Real-time tracking of the solar maximum power point boosts generation efficiency exactly where other solar vents fail: JustBrisk spins up at the first sign of dawn and keeps extracting power on cloudy days, early mornings and late evenings — conditions where most solar fans on the market simply stand still. It squeezes power out of even the weakest sunlight, keeping your ventilation running when the weather turns grey.

Brushless DC Motor

Variable-frequency drive. Adaptive ultra-wide voltage range.

Specifically engineered for solar performance curves, the drive adapts seamlessly to changing light levels across an ultra-wide voltage range — holding ultra-high efficiency at every speed, from a dawn trickle to full midday sun.

Dual-Shielded Ball Bearings

Sealed against dust and moisture.

Twin shields lock out dust and humidity, protecting the precision raceways for the life of the fan. The result: whisper-quiet rotation, less wear, and an operational lifespan measured in years of continuous outdoor duty.

Calibrated as One System

Panel, controller and motor — engineered together.

Most vents bolt an off-the-shelf motor to a generic panel and hope for the best. JustBrisk tunes the solar curve, MPPT logic and motor windings as a single system, squeezing the highest energy-to-airflow conversion out of every ray — the integration is the performance.

Aerodynamics

Sculpted by airflow,
proven by simulation.

Aerodynamic Design — Deflector

Fluid dynamics, honed by drone PhD engineers.

Developed by a PhD-level drone engineering team with deep experience in aircraft wings, airfoils, and propeller design. Iteratively refined through CFD fluid simulation and CATIA surface modeling, the deflector's curve is precisely matched to the 3D airflow distribution — guiding air along the vent's interior for a smoother, quieter exhaust.

Aerodynamic Design — Fan Blades

Lightweight · High rigidity · Corrosion resistant · Anti-aging

The blades are optimized through aviation-grade aerodynamic simulation: the airfoil cross-section and twisted-blade geometry work together to distribute airflow evenly along each blade, minimizing turbulence losses. A thickened, reinforced blade root eliminates the risk of fatigue fracture at high speeds, while multi-angle mounting allows flexible tuning of air volume and pressure.

High-Quality Build

Premium materials.
A decade outdoors, like day one.

Aluminum Alloy Housing

Cover and main body in corrosion-resistant, lightweight aluminum alloy.

Powder-Coated Steelwork

Every structural steel part — cylinder, brackets, mounts — is finished in an electrostatic powder coat, fusing a seamless rust-proof shell onto the metal.

Anti-UV Epoxy Powder Coat

Black anti-UV epoxy resin electrostatic powder coating: high strength, corrosion-resistant, long-lasting.

All Stainless Fasteners

Every fastener is stainless steel — no compromises, even in the details.

Formable Aluminum Base

The base plate shapes freely to any roof contour, so waterproofing seals snugly and installation stays effortless.

Bifacial Solar Panel

Two faces of sunlight.
One panel. 45° adjustable.

The front face drinks in direct sunlight while the rear harvests light reflected off the ground — generating more power from the same footprint, even when the sky won't cooperate.

  • Monocrystalline Silicon Cells
  • 3.2mm High-Transmittance Tempered Glass
  • Waterproof Photovoltaic Panel
Thermometer
fan on ≥ 25°C
Drag Me
20°C / 68°F
Temperature & Moisture Control

Set it. Forget it.
It knows when to work.

Fan standby

Smart temperature and humidity control — no supervision required. Set your own humidity threshold and the fan automatically ramps up extraction when the air turns damp. Humidity, heat, even smoke: all handled.

Hygrometer
Drag Me
Your Custom Threshold
Remote Control

Thirty metres. Through the ceiling.
Total control.

Memory

Power loss? It wakes up on your last setting. Lost the remote? A manual reset restores default operation.

Anti-mold

A short automatic spin every morning keeps moisture from ever settling into mold.

FORCE

One touch lifts every limit — full speed at any temperature.

JustBrisk multi-function remote control

30 m

Range that works straight through the ceiling — start, stop, adjust, all from the ground.

4 gears

Gentle / Low / Medium / High — the breeze you want, when you want it.

1 · 2 · 4 · 8 h

Set-and-forget timer for exactly as long as you need.

A full-function remote that turns a roof-mounted fan into an appliance you never have to climb to. Pairing takes five seconds within the first five minutes of power-up — and if the remote ever goes missing, a quick unplug-and-replug of the temperature probe boots the fan straight back to factory defaults.

Intelligent Power Supply

Smart power blending.
Running 24/7, rain or shine.

Solar and AC power are intelligently apportioned in real time — the fan only ever pulls the supplement it actually needs. Engineered for ultra-low-light activation, it starts at the first sign of dawn; when sunlight fades, the adapter automatically fills the gap; when the sun beats down, it cuts the grid entirely and runs on pure solar. Fitted with the adapter, your fan exhausts heat and moisture around the clock.

  • Dynamic Solar + AC complementarity
  • Draws only the power it needs
  • Automatic grid cut-off in full sun
0 6 12 18 24 13:00 ☀ Solar Panel 0% ⚡ AC Adapter 0% Motor — always 100%
? Remote-control option: overrides the controller and forces the fan on via the AC adapter even with zero sunlight.
Pure solar — grid disconnected
0 6 12 18 24 13:00 ─ available solar ─ motor draw Eco Eco gear
? Remote-control option: overrides the smart gears and pins the motor at full power, any time of day.
Eco gear
Dynamic Power Adjustment

Gentle in the morning.
Fierce at noon.
Frugal at night.

The motor follows the sun in smart gears. In low light — dawn and dusk — it holds its quiet eco gear: solar first, adapter topping up. Under full sun it steps up to its power gear on pure solar, adapter cut. At night it drops to a low-noise, energy-sipping load that keeps the air moving.

  • Two smart gears: eco & power
  • Quieter operation when full power isn't needed
  • One fan, multiple modes — all automatic

Technical Specifications

JBSF-320F, by the numbers.

Performance

ModelJBSF-320F · JBSF-350F
Cylinder diameter320 mm · 350 mm
Roof opening310 mm · 340 mm
Extraction volume2500–3000 m³/h
Motor42W brushless DC, 12–16V, 1600 RPM, dual-shielded ball bearings, built-in MPPT tracking
Solar panelMonocrystalline, 42–50W 15V DC, aluminium reinforced frame, 3.2 mm tempered glass
Fan bladesΦ300 / 330 mm aluminium alloy, five dynamically balanced blades
Noise≤35 dBA

Build & Dimensions

Auto temperature controlStarts above 26 °C (±1.5 °C), stops below
MaterialsAluminium cover & body, steel duct & bracket, stainless-steel fasteners
FinishBlack UV-resistant epoxy resin electrostatic powder coating
Base plate565 × 565 × 1 mm
Product size565 × 565 × 250 mm
Net weight7.8 kg · 8.0 kg
Warranty2 years, whole machine
CertificationsCE · FCC

Full datasheet and installation guide available on request — talk to us.

Use Cases

One fan. Every space.

From factory floors to capsule pods — if heat or moisture builds up, JustBrisk moves it out.

JustBrisk solar ventilation fan extracting heat from a factory floor

Factories

High-volume extraction for production halls and plant floors.

Solar exhaust fan clearing fumes and heat in a workshop

Workshops

Clears fumes and heat where people work with their hands.

Warehouse moisture control with solar roof ventilation

Warehouse Moisture Control

Keeps stock dry and mold at bay, around the clock.

Agricultural greenhouse ventilated by solar fans

Agri Greenhouses

Balances temperature and humidity for healthier crops.

Climate-stable livestock farm with solar ventilation

Climate-Stable Farms

Steady ventilation for livestock and breeding environments.

Solar attic fan venting trapped roof heat

Attics

A solar attic fan that vents trapped roof heat before it seeps into living space.

Silent solar ventilation for premium villas

Villas

Silent solar ventilation that matches premium homes.

Solar tent ventilation fan for marquees and temporary structures

Marquees & Tents

Fresh air for temporary structures, no mains power needed.

Solar air vent cooling a glass sunroom

Sunrooms

Turns stifling glass boxes into livable spaces.

Self-powered ventilation for capsule pods

Capsule Pods

Compact, self-powered ventilation for capsule living.

Why JustBrisk

Sustainability meets innovation.
The benchmark in solar ventilation.

A zero-emission ventilation solution backed by multiple national patents — trusted by homeowners and industry professionals worldwide. Aerodynamic simulation, solar PV performance and brushless motor engineering, calibrated into one unit. And it starts at the first sign of dawn: our ultra-low-light activation keeps JustBrisk moving air in conditions where competing solar vents simply don't work.

Zero Emission

Carbon-free cooling, powered by the sun.

7.8 kg

Ultra-lightweight — a seamless one-person install.

Patented

Multiple national patents behind the design.

15 V

Safe low-voltage monocrystalline solar system.

First-Light Start

Ultra-low-light activation — spinning at dawn while others stand still.

Sealed

Protective grille keeps out rodents and debris.

Certified

CE & FCC certified — tested, compliant, export-ready.

3000 m³/h

High-volume extraction on the 320 mm model.

24/7

Hybrid solar + AC keeps the air moving day and night.

Whisper-Quiet

Low-decibel engineering — shielded bearings, balanced blades.

JustBrisk CE Certificate of Compliance — EMC Directive 2014/30/EU, EN IEC 55014

CE Certified

Certificate of Compliance — EMC Directive 2014/30/EU (EN IEC 55014-1/-2). View full certificate →

 JustBrisk FCC Supplier's Declaration of Conformity — FCC Part 15 B

FCC Certified

Supplier's Declaration of Conformity — FCC Part 15 B (ANSI C63.4:2014). View full certificate →
Head to Head

JustBrisk vs. typical solar vents.

We've run the side-by-sides. Here's where the engineering shows.

CapabilityJustBriskTypical solar vents
Extraction volume ✓ Up to 3000 m³/h on the 320 mm model ✕ Noticeably lower airflow at comparable sizes
Low-light start-up ✓ Ultra-low-light activation — spins at first daylight, MPPT harvests weak sun ✕ Most won't start until direct, strong sunlight
Solar panel ✓ Bifacial, 45° adjustable, 3.2 mm tempered glass ✕ Single-face, fixed angle
Power management ✓ 24/7 intelligent solar/AC blending, draws only what's needed ✕ Solar-only — stops when the sun fades
Climate automation ✓ Temperature and humidity thresholds, plus anti-mold morning cycle – Basic thermostat, if any
Remote control ✓ 30 m through-ceiling, 4 speeds, 1/2/4/8 h timer, force-on override ✕ Rarely offered — simple on/off at best
Aerodynamics ✓ UAV-engineered, CFD-optimized deflector and twisted airfoil blades ✕ Generic stamped blades, untuned housings
Build quality ✓ Aluminium alloy body, anti-UV epoxy powder coat, stainless fasteners, rodent grille – Mixed plastics, exposed fasteners, open inlets
Installation ✓ 7.8 kg one-person install, formable base seals to any roof shape – Heavier units, rigid flat bases

The "typical" column reflects our own side-by-side comparisons of widely available solar roof vents.

Questions, Answered

Everything worth knowing.

What is a solar roof ventilation fan?

A solar roof ventilation fan — called a solar attic fan in the US, or a solar air vent elsewhere — extracts heat, moisture and stale air using only solar power: no mains wiring, no running costs, zero emissions. JustBrisk pairs a bifacial solar panel with a brushless DC motor and smart climate control to ventilate homes, attics, warehouses, greenhouses and more, completely off-grid.

Is JustBrisk a good solar attic fan?

Attics are one of its best use cases. Roof-void heat builds up fast, so the fan's automatic temperature control kicks in exactly when attics need it, and ultra-low-light activation means it starts earlier in the morning than typical solar attic fans. The formable base seals to pitched roofs, and installation is a one-person job at 7.8 kg.

Does it work in low light or on cloudy days?

Yes — this is where JustBrisk leads the market. Ultra-low-light activation starts the fan at the first sign of dawn, and the built-in MPPT controller extracts power from even the weakest sunlight. In side-by-side comparisons, most competing solar vents simply do not start in these conditions; JustBrisk keeps moving air.

Does it work at night?

With the optional intelligent AC adapter, yes — 24/7. The system blends solar and grid power in real time, drawing only the supplement it needs, and cuts the grid entirely in full sun. A remote-control force-on override runs the fan at full power any time, even with zero sunlight.

What roof types does it fit?

The formable aluminium alloy base contours freely to different roof shapes and surface profiles, sealing snugly against corrugations, tiles and flat roofs alike — waterproofing is easier, installation is cleaner.

Is it easy to install?

At only 7.8 kg, the unit is light enough for a seamless one-person installation, with no electrical wiring required for solar-only operation. The 15V low-voltage solar system is safe to handle throughout.

Where can it be used?

Factories, workshops, warehouses (moisture control), agricultural greenhouses, climate-stable livestock farms, attics, villas, marquees and tents, sunrooms and capsule pods — anywhere heat or moisture builds up.