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.

Not sure about make & model, I'd have to find the paperwork from when the house was built 8 years ago. It's radiant, not forced air. That's an option I could add but it would require electricity for that part.