Northern Lights Auto - 2nd shed grow

The cold temps have been a real issue this week. To combat the low temps I turned down the exhaust fan to low, now humidity and condensation is my problem so the exhaust fan is back to where it was previously. Night time temps have been as low as 4c this week, with the heating bars I manage an extra 10c in the tent but too cold. Nothing I can do really. Even though this is an indoor grow, when growing in a tin shed the only protection from the elements is wind and rain, temperature I just work with the best I can. Pretty happy with the plant anyhow, hoping for the buds to fatten up from now and will likely take this one to 10 weeks flowering.