AlorAir Sentinel Dehumidifier for Grow Rooms
AlorAir Sentinel Dehumidifier for Grow Rooms
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Order by 3pm Mon–Fri — we aim to post same day · FREE Express Delivery over £60 · 1–2 working days · Free Wembley pickup
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60, 90 or 100 litres a day, industrial moisture removal for serious grow rooms
Extraction at 30°C and 80% RH — the figure that matters in a grow room:
- Sentinel HD55 — 60 litres per day (30L at AHAM 26°C / 60% RH)
- Sentinel HD90 — 90 litres per day (45L at AHAM 26°C / 60% RH)
- Sentinel HDi120 — 100 litres per day (50L at AHAM 26°C / 60% RH)
AlorAir Sentinel dehumidifiers pull a serious volume of water out of the air and hold relative humidity in the range your plants actually want, even in demanding rooms. All three share an R410A circuit, automatic defrost, a 1°C to 40°C operating range and a 36% to 90% RH working range, and every unit carries 1 year parts and 5 year compressor warranty.
These units drain rather than collect. The HD55 and HD90 gravity drain, so they need a fall to a drain point; the HDi120 has a built-in condensate pump and will lift condensate up to 4.5m, which is what you want when there is no drain below the machine.
Key Benefits
- Up to 100 litres a day on the HDi120 — genuine commercial moisture removal
- Three sizes so you can match the machine to the water your canopy actually puts out
- Mould and mildew prevention, keeping RH out of the range spores need
- Automatic defrost holds output in cool rooms down to 1°C
- Industrial build for continuous commercial running
- Remote control available so the unit can be set from outside the room
Is High Humidity Holding Your Yields Back?
Persistently high humidity slows transpiration, which slows growth and blunts nutrient uptake, and it creates exactly the conditions mould and mildew need in dense flowers. A full canopy pushing moisture into a sealed room can hold RH high overnight, and by the time you can smell a problem the damage is in the buds. A Sentinel takes that load off continuously, so humidity stays where you set it.
How to Use
- Size by litres removed per day against the water your room actually transpires, not by floor area alone
- Site it with clear intake and discharge, away from the canopy
- Run the HD55 or HD90 to a gravity drain, or let the HDi120 pump condensate up to a sink or outside
- Drop target RH through flower to protect bud quality
- Clean the filter regularly, or fit the HD55 HEPA filter
Technical Specifications
- HD55 extraction: 60L/day at 30°C, 80% RH
- HD55 AHAM: 30L/day at 26°C, 60% RH
- HD55 coverage: up to 1,300 sq ft
- HD55 sound / drain: under 52 dBA, gravity drain
- HD55 dimensions: 490w x 310d x 340h mm
- HD55 weight: 26kg
- HD90 extraction: 90L/day at 30°C, 80% RH
- HD90 AHAM: 45L/day at 26°C, 60% RH
- HD90 coverage: up to 2,600 sq ft
- HD90 sound / drain: under 58 dBA, gravity drain
- HD90 dimensions: 590w x 388d x 450h mm
- HD90 weight: 38kg
- HDi120 extraction: 100L/day at 30°C, 80% RH
- HDi120 AHAM: 50L/day at 26°C, 60% RH
- HDi120 coverage: up to 2,600 sq ft
- HDi120 sound: under 55 dBA
- HDi120 drainage: condensate pump, 4.5m head
- HDi120 dimensions: 630w x 350h x 400d mm
- HDi120 weight: 35.5kg
- Refrigerant: R410A, automatic defrost
- Operating range: 1°C to 40°C, 36% to 90% RH
- Warranty: 1 year parts, 5 year compressor
- Also available: remote control and HD55 HEPA filter

FREE Express Delivery on orders over £60. We aim to post same day on Express Delivery — order by 3pm Mon–Fri — and delivery takes 1–2 working days. A few harder-to-stock or large, bulky items can take a little longer — we'll tell you if that applies to your order. 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.