Do you need to heat and cool at the same time? In other words, some brewers need to cool during the morning/afternoon and heat at night as temps fluctuate where they live.
I don't have this problem so what I do is I use the FTSS chiller kit from SS Brewtech (the pumps work great BTW and they are near silent). I then use an aquarium chiller that chills a small cooler filled with water and Glycol (the glycol is only in there to keep the water from turning funky). To heat when needed, drop an aquarium heater into the cooler full of water.
Now here is where it gets a bit complicated for the chilling part. I have a separate pump that pumps water through the aquarium chiller. Rather than have the pump running constantly I have it connected to an Inkbird temp controller that only turns the pump on when the temp in the cooler rises. The reason I do this is because before I used to leave the pump running 24/7 but then noticed that the water temps in the cooler would fluctuate, the reason being that the water was cooling the pump since it was heating up from 24/7 use. So to make it more efficient I hooked the pump up to an inkbird temp controller and it only goes on to pump water through the aquarium chiller when the water temp in the cooler rises.
I currently have 2 Conicals both using a dedicated FTSS system with two separate pumps and controllers for each in this setup. If both conicals are fermenting and require 70 - 65 degrees F temps, I keep the water in the cooler at 50-55 degrees F.
Another option beside an aquarium chiller is to hack up a small A/C unit and place the condenser coils directly into the cooler full of water. The plus to this is that you'll be able to get the water temps down far enough to cold crash if you want to and you can chill the water in the cooler directly without additional pumps. The Con is if you're in an apartment or it's in your house, it's a bit noisy (since the whole unit is in your house and not hanging out the window) and can generate some heat. The pros of the aquarium chiller are that it's much quieter than an A/C unit, fits cleanly anywhere and looks nicer. The Cons of the aquarium chiller are that it can only go down to 39 degrees (you could probably hack it to remove that limit but I haven't looked into it) and you need a separate water pump for it.
