Check your grow room climate during light and dark periods

Choose a representative measurement position

Put the sensor where you want to assess conditions. Avoid direct light, a heater outlet or a position right beside the incoming-air opening. These places may differ from the rest of the room.

Record the sensor position and keep it consistent across readings. Moving the sensor and changing equipment settings at the same time makes comparisons harder.

Record temperature and relative humidity together

Relative humidity depends on temperature, so assess both at the same time. Record whether lights are on, the fan setting and any change to doors or incoming-air openings.

Take readings at several points around lights switching on and off. An average can hide a short peak. A logging meter can show the pattern; a regular routine helps when using a standalone meter.

Check the air path before changing settings

First inspect incoming air, kinked ducting and dirty pre-filters. Check mounting and joints while following equipment safety instructions. Increasing the controller setting does not automatically solve a mechanical restriction.

Change one setting at a time

For a climate controller, check the probe position and minimum, maximum and target-temperature settings. Stay within the permitted settings for the fan model. Very low motor speeds are not suitable for every motor.

Review the pattern through both light and dark periods after each change. Consider heating or cooling once you have identified the cause and installation needs. Do not adopt a universal target value without considering your crop and conditions.

Use the record when choosing equipment

Keep room dimensions, lighting power, fan model, filter, duct diameter and measurement times. These details let us give more focused advice than simply knowing the room is too warm or too humid.

Choose your next step

Climate control & ventilation for your grow room · Inline duct fans for grow tents · Grow tent carbon filters · Grow room climate controllers · Ventilation ducting for grow tents ·