ktvu katie yodis rather explains why crews say this particular house fire was even more dangerous. >> -- big noise, a big ruckus outside. >> around 2:30 this morning flames ripped through a home there. >> they were really high, everything started off really really fast. by the time the second firefighter came it was from front to back. >> a man, woman and their baby boy escaped through the front door. investigators say the family was using the kitchen stove to keep warm and that caused the fire. >> the sound of the fire, smoke pretty much woke the family up, they pretty much escaped no harm. >> but the fire raged damaging homes on both sides. >> it was a quick moving fire, actually when we got on scene it was fully involved and we just wanted to slow the flames. >> the duplex to the left is unoccupied, on the right a family moving in but still not living there. it took crews half an hour to get the flames under control. firefighters told me homes like this one pose extra challenges for them. it is manufactured so made in a facility you can see where it is nailed together here then del