Interesting fire a few days back in a manufactured home. Moderate case of "Colliers Mansion" throughout made the stretch tough. Heavy smoke conditions enveloped the structure upon arrival with no visible fire showing. Definitely in a "ventilation-limited" state. As I got a quick C side view prior to making entry for back up fire attack, I was able to feel significant heat from a fractured window and spot the location of the fire bedroom. Fire attack was calling for ventilation and I could hear the insistence in his tone as I was in a prime location to provide it. Oh to break or not to break the window was an interesting internal debate! Crew in the hallway making their way to the fire and calling for vent. Front door has been open for a few minutes and conditions match throughout. Standard horizontal ventilation procedures call for locating the fire, check, taking the window to the fire bedroom and voila', things get better. Right? Or because of the new found education I've received from the NIST and UL studies regarding flow paths and door control, do I refrain? This was the dilemma. Want to know what I did? Check out the pics and give me your thoughts?