The house I live in has two gas fireplaces, both 20-30 years old. They work in the same manner described above, with no requirement for electricity. Each one al

The house I live in has two gas fireplaces, both 20-30 years old. They work in the same manner described above, with no requirement for electricity. Each one also has a blower that is simply plugged into the wall (one runs continuously, the other is thermostatically controlled; both are very loud). The blowers are optional, and the house gets adequately heated even when they are off.