So I scored an old garden shed made of 50mm Cool Room sandwich insulation panels, which I'm hoping to assemble into a fermentation chamber inside my shed. (It's an un-insulated tin shed so it's an oven in summer and too cold in winter. Before I scored the cool room panels I was planning to add insulation to the shed, but this seems easier). Once it's together I'm hoping the temperatures will stay in the right range for brewing all by themselves, but was thinking I'd add an air conditioner to allow better temperature control if need be (and funds permit). The 'dead fridge' fermentation chamber I currently use needs ice blocks added to keep temps down in summer, so I'm hoping the insulated panels perform better. I was doing a bit of basic research on the air conditioner, and it seems like some yeasts (or some beer styles) might be best fermented as low as 9 degrees, but I don't think that most air conditioners go that low. Anyone brewing beers at low temperatures using an Air conditioner (perhaps overridding the thermostat)? Or are they all brewing in a fridge? I think an Air conditioner is going to struggle to hit fridge temps, and a fridge isn't going to have the capacity for the cool room heat load. Commercial units are probably expensive. I'm ok with taking the cheaper option of a residential air conditioner and being limited to 16 degree minimum temps, unless anyone knows of another option? Cheers all!