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If there is a power outage,
the LVR
Operable Vent System still may be used. It has a black handle
that may be pulled out and turned to control the lifting and lowering
of the vent. Greenhouse growers love this feature because if the power
goes out and the vent is closed, the greenhouse may heat up and the
plants may be damaged or killed. Or, if the vent is open and the temperature
outside drops, lowering the vent is a must. This is a great reason
for choosing this system. |
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