Hi all hope your well its been a long-time since I've been on here .. been bouncing round rented houses so not been growing my last one was a loft grow which i did well on a whole but the last one was crap full of seeds which assume was a herm due to the hot summer we had Not sure if this is the correct section but the new house has a nice garage to build a grow room.. coming from a loft I have a few questions Ok grow room size I've got 3m x 2m i intend to build a 3 long x 2 wide x 3 .5 High frame and use 75mm king span to create a fully insulated box.. there will be a air gap of 100mm right around the box .. the garage is a fully brick units with a tiled roof lighting I still have 6 x 315 CMH id like to use and 4 x UK DIY led units can think of the model but it was a 400w HPS replacement could mix these up as wont need to run them all ventilation my stuffs still boxed but I'm sure i have 1 x 10" stealth perish fan matched with the same make 6" fan controlled by a G.A.S controller which ramps up and down In the loft i used 6 x 11ltr pots in a scrogg with coco.. i did wonder if upping the pot size might increase my yield ? Nutz i was using the Canna feed since it was some time again maybe there is better out there now.. Something new Some months ago i was stripping a old factory out which had gone pop and i was able to get my hands on 2 x Mitsubishi air con units which i have in storage i believe these are around 15000 Btu.. I'm thinking of installing these but need to do a lot of research how they would be used in a grow room assuming there don't remove any air from the area so smell shouldn't be a issue and it would mean that i don't need to exchange so much air to cool therefore been more stealthier? any one got some advice on AC or tips to look into? Humidity not sure on this one would the AC help here Thanks in advance

Hi, I was wondering if anyone here has any examples of the effect of using a portable AC unit within a smallish (3mx3m) room, on grow tent temperature? With the current heat, I am struggling getting the temps down in the tent even when using the T5 prorogation light. I know the BTUs required will depend on many factors, but I am not sure how many BTU's I would need for that space, and thought some indicative examples from the community may help with my guess. Cheers

Good day uk420! This could be the wrong place to post this since most of you here are in UK but oh well I'm in need of an ac unit, Problem is I dont want to have someone in to fit it. I'm looking up the highest rated enery efficient portable AC units for around 250-500Euros, My question is how efficient are they compared to a mini split AC?