Significant Stuff from the UL/NIST Studies: Not Exterior Water Application

I have been sifting through information, articles, blogs, classes, videos and everything in between for the past couple of years from the recent UL and NIST burns and research. We have all argued or debated about the application of exterior water and whether or not this is appropriate or not. While I believe there is a time and place for exterior water application, for me there are some other valuable conclusions or considerations that have not played a prominent role in these debates.

First, let me just preface my thoughts by saying that I can’t recall a time in my fire service career when fire behavior and dynamics has been at the forefront of firefighter discussion: this is a good thing! It has always taken a back seat to tactics and more ‘sexy’ topics, so no matter what your opinion is of the science and associated conclusions that are shared, you cannot argue that this has been a great thing for the fire service in general. Here’s why.

There is more talk, studying, discussion, debate and training being done on the more basic functions of firefighting than I can remember over the last 20 years. That’s not to say it wasn’t there, it just wasn’t as prominent in the class listings. Now, we can’t go to a conference without seeing classes on moving hose lines, effectiveness of fire streams and yes, the differences of fog versus smooth bore. There is real, hard evidence being provided about the reach, gpm vs. btu’s and the list goes on. These fundamentalists, I use that term in an endearing fashion, are well armed with heat release rates that need to be overcome and can apply their knowledge of water and cooling from hose lines to the data being provided from the research.

There is real interest in heat release rates, heat flux and interior temperatures during fires. Fire behavior education has taken on a whole new meaning and has turned classes speaking in monotone about the fire triangle into meaningful discussion about exactly ‘what’ is happening on the interior during fire growth relating energy to the effects it has what we can and can’t do without cooling. Thus, back to moving hose lines while flowing!

We can more easily explain, with understanding, the effects of heat energy on our gear and protective ensemble. The gear we wear is not only susceptible to temperatures, but heat energy as well. Our face pieces are highly susceptible to this and can fail much faster than our bunker gear. The research has allowed us to identify some of those dangers and time frames for failure. Again, making cooling the environment even more important, no matter where you are in our about the building.

The information has shed some light on the very small window of opportunity for successful ventilation during building fires. It shows that ventilation teams or crews must be patient and communicating with the interior crew is critical and required. It has also shown that effects of over-ventilating and venting without regard to conditions and resources. Have we suspected or known this? Sure, but the studies have given us quantifiable information that validates those beliefs.

Speaking of resources, if we don’t have the initial resources to get to the fire, these studies has shown that having tactical patience is a must. Keeping the building sealed up until you are completely ready can pay off with huge dividends by limiting fire growth. For example, we know we have a fire on a second floor and we suspect from our size up that we have return stairs and a landing going up, and we are sitting with two personnel. It might be wisest to wait on the next company before we open the building and move the line. It might actually be faster to move the line to the second floor after waiting for two or three more crew members, not allowing the fire to grow unchecked in those circumstances. Stuff we already knew? Maybe, but the testing showed that it is appropriate to be patient to limit fire growth.

How about what the studies have shown for us to convey to the general public? Controlling the door isn’t just for firefighters making entry or performing VES. Maybe we should be changing our evacuation message to our citizens to one of compartmentalizing themselves from the fire and the rest of the building. It has been shown that even at low levels, with little or no smoke, there can be high levels of CO at the floor. So, occupants trying to escape may be better to isolate themselves and get to a window. Just some food for thought.

I guess I just want us to look at the research from as many levels as possible to improve the fire service and not just get hung up on the hot button issue of exterior water application. I believe that there is and will be more information that we can use in other ways than just the water application. Some are being discussed, like door control and ventilation, and we should be taking advantage of the information. Let’s look beyond the easy debate of exterior water and see what we can find to help us on a daily basis in all areas of fire attack. One of the videos shows a side by side look at a house fire, one with a TIC and one without. It has been invaluable in teaching size up, the 360 and the use of the TIC conducting both. Or the importance of the line officer frequently monitoring conditions for heat while advancing the line? Critical!

So, find and use the information for as much as possible, not just one facet of the research. Be inquisitive, question information, but don’t just blatantly discard it. Be engaged and share the information.

Thanks for reading and have a great week.

1 Comment

  • John Mallott says:

    Jason; Some good information the fire service is very dynamic and always changing. thanks for the article will share with the fire department officers for “food for thought” and some insight information..

Leave a Reply

Your email address will not be published. Required fields are marked *

background image Blogger Img

Jason Hoevelmann

Deputy Chief/Fire Marshal with the Sullivan Fire Protection District, a combination department, and a career firefighter/paramedic with the Florissant Valley Fire Protection District in North St. Louis County.
Recent Posts
How Much is Enough? September 10, 2014
IMG_1663-0.JPG Blauer Boot Review September 8, 2014
FREE Webinar Rescheduled August 27, 2014
Really?!?! August 23, 2014
Chris Sterricker
Great read Jason. I liken this issue to the recent unfortunate events in Kentucky in which a firefighter was killed and another, his mother, seriously injured when struck at the scene of a car fire. The response to the tragedy was for the fire department to immediately institute a complete shut-down policy of any incident…
2014-08-27 00:39:49
Bill Carey
Well written Jason; nice job. Bill Carey
2014-08-25 13:37:42
John Mallott
Significant Stuff from the UL/NIST Studies: Not Exterior Water Application
Jason; Some good information the fire service is very dynamic and always changing. thanks for the article will share with the fire department officers for "food for thought" and some insight information..
2014-08-04 16:54:47
Billy Shockley
Opportunities for Training: Not Just on the Drill Ground
Love to have the opportunity to train to be a firefighter
2014-07-18 21:00:13
FREE Webinar from The New Fire Officer: Part 2
I will post the link today for the first video. I am attaching a video that also explains an online course that I offer for officer development. The next class is beginning Sept. 4, 2014. Look for the link on this page and at This is the link for the first video.…
2014-07-18 15:50:08
Author Unknown
The Part We Forget
The Part We Forget
The Real Problem With Ray Rice
The Real Problem With Ray Rice
Techno:  Could Be Time
Techno: Could Be Time
Labor: Leave Ray Rice Alone
Labor: Leave Ray Rice Alone

Jason Hoevelmann's Discussions

/* Removes Buzzboost Logo (MBT) */ div #creditfooter{ display: none; }
Follow Jason Hoevelmann

AFFOWE Calandar

August 2014
« Jul   Sep »

FireEMS Blogs eNewsletter

Sign-up to receive our free monthly eNewsletter