Fruiting Chamber Sizing
Size a fruiting chamber for the blocks you need to fruit at once — footprint, height, interior volume and blocks per shelf — so every block gets the air and humidity it needs.
Sizing leaves working air around each block so fresh air and humidity reach every fruiting face; crowding is how you get patchy pins and contamination. More shelf tiers trade footprint for height — a Martha tent is usually four or five. The interior volume feeds the Humidifier Sizing tool, since a bigger box needs more output to hold the same humidity.
Sizing leaves working air around each block so fresh air and humidity reach every face. The interior volume feeds the Humidifier Sizing tool — a bigger box needs more output to hold the same humidity.
How to use it
- Enter your blocks. How many blocks or containers you need to fruit at once.
- Pick the container type. Grow bags, monotub or jars — each has its own footprint.
- Set shelf tiers. More tiers mean a smaller footprint and a taller chamber.
- Read the dimensions. Footprint, height, interior volume and blocks per shelf.
Questions
How big a fruiting chamber do I need?
It depends on how many blocks you fruit at once and their type. The calculator sizes the footprint, height and volume, leaving working air around each block.
What is a Martha tent?
A plastic greenhouse shelf used as a fruiting chamber — cheap, humid, and easy to rig with a humidifier and a fan.
How much space between blocks?
Leave an air gap around each block so fresh air and humidity reach every fruiting face; the sizing builds that in.
How does chamber size affect humidity?
A bigger volume takes more humidifier output to hold the same humidity. Take the volume to the Humidifier Sizing tool to pick an output.