The Cultiv8 Tube Heater is a compact greenhouse heater designed to provide steady background warmth in greenhouses, grow tents and other small growing spaces. Its slim tubular design delivers silent radiant heat without taking up the floor space of a conventional fan heater.
Available in five wattages and lengths from 30cm to 120cm, this tubular heater can be matched to the approximate volume of your setup. It is particularly useful for growers who need to manage cooler overnight conditions or maintain a more consistent temperature through winter.
Key benefits
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Gentle, consistent heating: Provides background radiant warmth rather than a strong blast of hot air.
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Space-saving design: The slim tube can be mounted horizontally on a wall or floor using the included mounting hardware.
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Quiet operation: Runs without a fan, making it suitable for grow tents and indoor growing areas where noise matters.
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Suitable for humid grow spaces: The IP55-rated housing provides protection against dust and light water exposure.
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Built-in thermal protection: An overheat cut-off supports safer continuous operation.
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Thermostat compatible: Can be paired with a suitable temperature controller for more precise heating control.
Best suited to
- Small greenhouses and propagation spaces
- Indoor grow tents and compact grow rooms
- Insulated sheds or enclosed garden work areas
- Growers managing low overnight temperatures
- Setups that need quiet, low-profile background heat
How to use it
Install the tube heater horizontally using the supplied mounting hardware, either low on a wall or in a suitable floor-level position. Leave clear space around the unit and keep it away from tent fabric, plastic, pots and other items that could touch or cover the heater.
Connect the heater to a 220240V, 50Hz power supply. It can run continuously, although using a compatible thermostat is recommended when you want the heater to switch according to the measured temperature. Allow the unit to cool before cleaning, then wipe it with a dry or lightly damp cloth.
Choosing the right option
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60W / 30cm: Recommended for insulated areas of approximately 2m.
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80W / 61cm: Recommended for insulated areas of approximately 23m.
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120W / 61cm: Recommended for insulated areas of approximately 34m.
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180W / 90cm: Recommended for insulated areas of approximately 45m.
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240W / 120cm: Recommended for insulated areas of approximately 56m.
These coverage estimates assume a snug, insulated space. Choose the next wattage up where the area is draughty, poorly insulated or exposed to colder outside conditions. Actual temperature improvement will depend on insulation, ventilation, ambient temperature and heater placement.
Check before buying
- Measure the volume of your space before choosing a wattage.
- The heater is designed for steady background warmth, not rapid fan-forced heating.
- Mounting hardware is included.
- Horizontal installation is recommended.
- The heater surface becomes hot during operation and must not be covered or touched.
- Keep electrical connections dry and do not spray water directly onto the unit.
- The 240W, 120cm model cannot be sent through Australia Post and is excluded from free-shipping promotions.
FAQs
Can the Cultiv8 Tube Heater run continuously?
Yes. It is designed for continuous operation and includes built-in thermal protection. A compatible thermostat can provide more precise temperature control.
Is this tube heater suitable for a grow tent?
Yes. Its slim profile and quiet radiant operation make it suitable as a tube heater for grow tent setups, provided it is mounted securely with sufficient clearance from the tent material and equipment.
How much can it raise the temperature?
In a snug, insulated setup, the heater may increase the ambient temperature by approximately 810C. Results vary according to insulation, draughts, ventilation and outside conditions.
Does the heater make noise?
It operates silently because it does not use a fan. A faint ticking sound may occur during the first few hours of operation.
Choose the Cultiv8 Tube Heater size that matches your growing-space volume for compact, quiet background heating in a greenhouse, grow tent or small enclosed setup.
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