RAM Ultrasonic Humidifier for Grow Room Humidity
RAM Ultrasonic Humidifier for Grow Room Humidity
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Order by 3pm Mon–Thu for next-working-day delivery · FREE delivery over £50 · Free Wembley pickup
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The Biggest Tank on the Hobby Market, So You Refill Less
An ultrasonic humidifier built for growers who are tired of topping up a small reservoir twice a day. The RAM unit carries a 13L tank, the largest capacity of any humidifier on the hobby market, and produces mist at 1100ml per hour. Analogue control lets you set output to suit the room rather than running flat out, and four nozzles plus an extra hole spread mist evenly instead of dumping it in one corner. Auto cut-off protects the unit if the reservoir runs dry.
Key Benefits
- 13L tank, the biggest capacity on the hobby market, so refills are far less frequent
- 1100ml per hour output, enough to lift RH in a serious grow space
- Four nozzles and an extra hole for even mist distribution across the room
- Analogue control, dial in exactly as much humidity as the space needs
- Auto cut-off protects the unit when the reservoir empties
Are Your Plants Drinking Faster Than They Can Feed?
Dry air is a hidden yield killer. When RH sits too low, stomata close, transpiration stalls and with it goes calcium movement and nutrient uptake, so you get slow growth, crisping leaf edges and excessive stretch. Cuttings suffer worst, wilting through transplant shock before roots can keep up.
How to Use
- Fill the tank with clean water and sit the unit on a level surface off the floor
- Aim the nozzles away from plants and lights, ideally into the path of a circulation fan
- Set output on the analogue dial and check RH at canopy height after 30 minutes
- Automate by plugging into a humidity controller so it holds a set RH
- Clean regularly, descaling the transducer to keep output at full rate
Technical Specifications
- Brand: RAM
- Product type: Ultrasonic humidifier
- Tank capacity: 13L
- Humidification rate: 1100ml per hour
- Control: Analogue output adjustment
- Outlets: Four nozzles plus an additional hole
- Safety: Automatic cut-off when the reservoir is empty
- Compatibility: Works with an external humidity controller

Free next-day delivery on orders over £50 (order by 3pm Mon–Thu). Heavy-item surcharges are always shown at checkout before you pay — we only ever charge what delivery costs us. Prefer to collect? Free pickup at our Wembley store.