Blog

What Does VPD Mean in a Grow Tent?

Learn what vapor pressure deficit means in a grow tent, how temperature and relative humidity combine in the calculation, and why air VPD, leaf-to-air VPD and crop targets should not...

Where Should You Put a Temperature and Humidity...

Learn where to place a temperature and humidity sensor in a grow tent, which local influences can distort its readings, and how to test whether one measurement point represents the...

What Does a Carbon Filter Do in a Grow Tent?

Learn what an activated carbon filter does in a grow-tent exhaust path, what adsorption can and cannot remove, how filter resistance affects airflow, and which signs belong in a defensible...

What Does Watts per Square Foot Mean for Grow L...

Learn how to calculate grow-light watts per square foot, define the area and input power correctly, and understand why this electrical planning ratio cannot replace PPF, PPFD, photon efficacy or...

Grow Tent Duct Fan vs Clip Fan: What Does Each ...

Learn the difference between a grow-tent duct fan that exchanges air with the surrounding room and a clip fan that circulates air inside the tent, plus a practical way to...

How Much Heat Does a Grow Light Add to a Room?

Estimate the heat-flow equivalent of a grow light from its electrical input watts, convert watts to BTU per hour, and understand why the result is a planning load rather than...