OptiClimate Pro 3 Water-Cooled Grow Room Air Conditioner
OptiClimate Pro 3 Water-Cooled Grow Room Air Conditioner
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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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Cool, Heat, Dehumidify and Filter From One Unit
The OptiClimate Pro 3 Series water-cooled air conditioner cools, heats, dehumidifies, filters and circulates air in one system. Because it works with water rather than coolant gases there is no outdoor unit, so the space stays fully enclosed and installation needs no refrigeration engineer. Ceramic heaters deal with low temperatures, the water circuit with high ones. Water use is a moderate 1-2 litres per minute on single-phase residential mains.
What’s Included
- 1 x OptiClimate Pro 3 Internal Unit
- 1 x OptiClimate Pro 3 External Unit
- 1 x Controller Unit
- 1 x Temperature Probe
- 1 x Humidistat / Light Sensor
- 1 x 8m Pre-Charged Pipework
- Top-of-room mounting: 1 x flange, 4 x insulating anti-vibration feet
- Remote or low-level mounting: 1 x plenum box, 2 x flanges (intake and outlet)
Key Benefits
- Five functions in one unit – cooling, heating, dehumidification, filtration, circulation
- No outdoor unit required, so the grow space stays fully enclosed
- Much lower energy consumption than a traditional air conditioner
- Pre-heat and slow cool-down eases plants into day and night cycles
- Auto-shutdown on leakage, with alarm system connection
- Generates useable water for your reservoir
Temperature Swings and Overnight Humidity Spikes
A room that bakes under the lights and drops sharply at lights-off never gives stable VPD, and you get excessive stretch, poor nutrient uptake and airy flowers. Overnight humidity is the other half, sitting high in the canopy where airflow is weakest. Holding both in a set band keeps transpiration on track.
How to Use
- Mount at the top of the grow area with the flange and feet, or away from it with the plenum box and two flanges
- Connect the 8m pre-charged pipework between internal and external units
- Site the probe and humidistat/light sensor at canopy height
- Set separate day and night targets to follow the lighting cycle
- Route the warm water outlet to a drain, or recirculate it through an OptiClimate water cooler
Technical Specifications
- Models: Pro 3500, Pro 6000, Pro 10000
- Functions: Cooling, heating, dehumidification, filtration, air circulation
- Cooling method: Water-cooled, no coolant gases
- Heating: Ceramic heaters
- Water consumption: 1-2 litres per minute
- Power supply: Single-phase residential mains
- Pipework: 8 m pre-charged
- Outdoor unit: Not required
- Safety: Auto-shutdown on leakage, alarm system connection
- Control: Controller unit, temperature probe, humidistat / light sensor
- Siting: Inside or outside the grow area or tent

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.