Oh, how adorable! They're both so sweet. Regarding heating...I live in California, so it doesn't get too cold during the winter around here, however, it 'does' get cold, and we normally keep the heat set at 65 degrees...at the most. The tiels do just fine. During the day, it is warm enough downstairs, but at night, we turn the heater down really low because it makes the house dry, and thus makes it hard to sleep. Sometimes the temperature in the house drops to 60, or even less. I keep the birds in my room at night, where it is warmer, and cover their cage with their own, personal, warm blanket. They do just fine. I don't think they'd appreciate too much heat, but 70 is a good temperature. They do okay at 65 too, but I notice they begin to cuddle more at that temperature...which makes me think they're feeling cold. We keep them warm but not too warm. If its close to 70 in your house...even a little less, the birds should be fine. Just keep them away from drafts, of course. They're warm blooded animals, so they don't need any special 'heating' like a reptile would. Just the normal house heating that us humans use.