Yes and no. Infrared converted cameras are only sensitive to near infrared light in the 700nm-1200nm range. To detect thermal infrared of something like a person or a house, you need special equipment that records in the 5000nm-14000nm range. HOWEVER, just like iron will glow when hot enough, hot objects in the range of 250°C to 500°C sometimes emit a near infrared glow that can be observed with these cameras. More details can be found here.