Does your motorhome, caravan or campervan fridge struggle in hot weather?
Fridges work hard in summer — and without proper airflow the fridge becomes inefficient.
FridgeAir fixes that.
It continuously monitors the temperature difference between the top and bottom of the cavity and chimney behind the fridge. When the top starts rising faster than the bottom — a reliable early warning that natural airflow is no longer keeping up — FridgeAir automatically starts circulating air before temperatures climb high enough to affect cooling performance.
Quiet when cool. Powerful when hot. You’ll never think about it again.
No app. No on/off switch. No Bluetooth. No setup. Just plug it in — it works, whatever the season.
Click to see Herman Hits the Road install & review
What FridgeAir does
Smart delta-driven cooling — unlike traditional thermostatic controllers, FridgeAir reacts to temperature difference, not just temperature, if the top of the cavity starts running noticeably hotter than the bottom, FridgeAir brings the bottom fan in to help circulate air, even before the bottom sensor itself has warmed up.
Continuously monitors top and bottom temperatures with precision digital sensors.
Variable fan speed — ramps up with temperature, very quiet when cool.
Protects your leisure battery — fans cut automatically if voltage drops too low for a sustained period, then restart when charging resumes.
Single-sensor mode — works with just one sensor and one fan. FridgeAir automatically switches to a tuned single-fan profile so performance stays strong even when dual-sensor/fan routing isn’t practical.
Green LED heartbeat confirms the unit is alive and working.
Double-flash warning when the leisure battery voltage is marginal — the unit hibernates until the battery recovers.
Boot self-test — both fans run briefly at startup so you know everything is working.
While idle and monitoring, FridgeAir draws only ~65µA (~0.002Ah per day), helping preserve your leisure battery.
PCB protected with MG Chemicals 419D acrylic conformal coating for moisture and vibration resistance.
Colour-coded and clearly labelled — wiring takes minutes
What’s in the box
Controller only option
FridgeAir controller in carbon-fibre PLA enclosure
2 × DS18B20 temperature sensors (red = top, blue = bottom)
2 × sensor mounting clips
2 × cable ties
Quick Start Guide
Complete kit adds
Technical
Protected input — onboard self-resetting polyfuse (3.5A hold / 6A trip) and reverse polarity protection safeguard both the unit and your vehicle wiring from wiring faults and transient events.
Supply: 12V DC (leisure battery).
Fan output: 12V PWM, dual channel, variable speed.
Top fan triggers above 45 °C, full speed at 65 °C.
Bottom fan triggers above 40 °C, full speed at 65 °C.
Separate fan profiles optimise airflow direction and minimise unnecessary fan operation.
Smart delta-latch — automatically runs the bottom fan whenever the top sensor is above 36°C and the temperature difference between top and bottom reaches 8°C, ensuring cold-air circulation even before the bottom temperature rises on its own. Once running, it stays engaged until the gap is acceptable.
Leisure battery warning below 12.3V, protection cuts in below 12.0V sustained, auto-recovers above 12.4V.
Flexible fan outputs — each channel can drive two fans in parallel (max 0.5 A / 6 W per channel). Dual fans top and dual fans bottom is fully supported.
Single-sensor mode — use the blue sensor and one fan at the top of the chimney. FridgeAir automatically switches to a more enhanced profile.
Click for the Quick Start Guide
To see Herman Hits the Road install & review, [click here]
For full photo gallery including PCB detail [click here]
Does your motorhome, caravan or campervan fridge struggle in hot weather?
Fridges work hard in summer — and without proper airflow the fridge becomes inefficient.
FridgeAir fixes that.
It continuously monitors the temperature difference between the top and bottom of the cavity and chimney behind the fridge. When the top starts rising faster than the bottom — a reliable early warning that natural airflow is no longer keeping up — FridgeAir automatically starts circulating air before temperatures climb high enough to affect cooling performance.
Quiet when cool. Powerful when hot. You’ll never think about it again.
No app. No on/off switch. No Bluetooth. No setup. Just plug it in — it works, whatever the season.
Click to see Herman Hits the Road install & review
What FridgeAir does
Smart delta-driven cooling — unlike traditional thermostatic controllers, FridgeAir reacts to temperature difference, not just temperature, if the top of the cavity starts running noticeably hotter than the bottom, FridgeAir brings the bottom fan in to help circulate air, even before the bottom sensor itself has warmed up.
Continuously monitors top and bottom temperatures with precision digital sensors.
Variable fan speed — ramps up with temperature, very quiet when cool.
Protects your leisure battery — fans cut automatically if voltage drops too low for a sustained period, then restart when charging resumes.
Single-sensor mode — works with just one sensor and one fan. FridgeAir automatically switches to a tuned single-fan profile so performance stays strong even when dual-sensor/fan routing isn’t practical.
Green LED heartbeat confirms the unit is alive and working.
Double-flash warning when the leisure battery voltage is marginal — the unit hibernates until the battery recovers.
Boot self-test — both fans run briefly at startup so you know everything is working.
While idle and monitoring, FridgeAir draws only ~65µA (~0.002Ah per day), helping preserve your leisure battery.
PCB protected with MG Chemicals 419D acrylic conformal coating for moisture and vibration resistance.
Colour-coded and clearly labelled — wiring takes minutes
What’s in the box
Controller only option
FridgeAir controller in carbon-fibre PLA enclosure
2 × DS18B20 temperature sensors (red = top, blue = bottom)
2 × sensor mounting clips
2 × cable ties
Quick Start Guide
Complete kit adds
Technical
Protected input — onboard self-resetting polyfuse (3.5A hold / 6A trip) and reverse polarity protection safeguard both the unit and your vehicle wiring from wiring faults and transient events.
Supply: 12V DC (leisure battery).
Fan output: 12V PWM, dual channel, variable speed.
Top fan triggers above 45 °C, full speed at 65 °C.
Bottom fan triggers above 40 °C, full speed at 65 °C.
Separate fan profiles optimise airflow direction and minimise unnecessary fan operation.
Smart delta-latch — automatically runs the bottom fan whenever the top sensor is above 36°C and the temperature difference between top and bottom reaches 8°C, ensuring cold-air circulation even before the bottom temperature rises on its own. Once running, it stays engaged until the gap is acceptable.
Leisure battery warning below 12.3V, protection cuts in below 12.0V sustained, auto-recovers above 12.4V.
Flexible fan outputs — each channel can drive two fans in parallel (max 0.5 A / 6 W per channel). Dual fans top and dual fans bottom is fully supported.
Single-sensor mode — use the blue sensor and one fan at the top of the chimney. FridgeAir automatically switches to a more enhanced profile.
Click for the Quick Start Guide
To see Herman Hits the Road install & review, [click here]
For full photo gallery including PCB detail [click here]
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