At that age they probably don't need any heat in the house. The temperature is probably the same day and night. They'll tell you how they are doing. If they are too hot they tend to get as far from the heat as they can (with your inside set-up that is not easy) and lay around panting. Panting is how they shed excess heat as they do not sweat. If they are cold they tend to get as close to the heat as they can get (with that light off there is no heat), they huddle up together, fluff up, and give a plaintive peep. That peep is long, drawn out, and really sad. You can tell by listening that something is wrong. If they are neither too hot nor too cold they tend to be active and spread out. Watch and listen to your chicks. They can tell you better than anyone over the internet can.
The important thing in leaving them outside is what are your nighttime lows. A lot of people take them out during the day for a while as enrichment. I think that does more good for the people than the chicks as the people are gaining confidence that the chicks can handle it. The important thing outside is that they be protected from wind and kept dry but temperature is still important when they are that young.
The important thing in leaving them outside is what are your nighttime lows. A lot of people take them out during the day for a while as enrichment. I think that does more good for the people than the chicks as the people are gaining confidence that the chicks can handle it. The important thing outside is that they be protected from wind and kept dry but temperature is still important when they are that young.