HOW TO CALCULATE YOUR GROW ROOM FAN SIZE
When plants grow (or bloom) they extract carbon dioxide (CO2) from the air. When they are small little cuttings, seedlings or juvenile plants, the amount of CO2 they use is relatively miniscule-after all, those tiny little things probably only have a handful of baby-sized leaves a piece. The more your plants grow, the more they grow! That is, the more leaves your plants have, the greater their capactity to convert light into plant energy. This equates to an exponential growth rate. One way of hammering this important point home is to think of your plants in terms of total amount of leaf surface area. Total leaf surface area gives you a useful insight into the amount of transpiration and photosynthesis a plant will want to undertake in optimal conditions. A young plant with half a dozen small leaves may have a total leaf surface area of, say, 50cm2 whereas just a month or so down the line it could have several hundred leaves, many of them much larger, adding up to 10,000cm2 or more! ...