Way to make more money.

Grant said:
That sentence is in 1998 but not 2001 or 2004.
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You might want to read it again; it is in 2004. Page 11 I think. It is the next line, just under what you quoted in your 2nd post in this thread.

Grant said:
Aluminum distorts and crushes alot easier than galv or SS. Also it discolors if you get your chems on them
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That means what in regards to NFPA? NFPA dosen't say anything about discoloring. It does say "will not distort or crush under normal operation, handling, and cleaning conditions."

I think aluminum meets the above criteria.

I am not sure why this is being argued. If the manufactures are selling them and shipping new hoods with them, they must think they meet current standards.

I suppose it comes down to what the customer can afford to pay. I have one school system (21 schools in their district) will will fork over just over $31,000 for OUR services this year, and that includes $5880 for new filters. If I were to sell them all SS filters, $5880 would turn into $9275. Aluminum just saved them $3,395. A savings like that to a school is ALOT of money beleive it or not.

And as Stas427 put it, sell them more later. It's not my business to conduct THEIR business. I'll sell them freaking GOLD filters if they want; but they will cost them a lot more than $55 per filter.

People generally like the lower price. Aluminum is a lower price than SS and aluminum (from what I can see) is allowed to be installed.

Is there any function that SS baffeled filters have that aluminum baffeled filters do not have?
Ask yourself this:
1) What purpose do the filters serve?
2) How does SS out perform or reduce any hazzards over aluminum while doing the function from question #1?
 
Michael T said:
I think the point of a baffled filter is to create centrifigal force in the air as it passes between the baffles. This causes the suspended grease to sling out of the air and thus removing some of the grease from the exhaust air. I dont think it has anything to do with the baffles collapsing to cut off air supply. I think it does have an effect on the path of the flame. Yes a flame will go thru a mesh filter readily. Isnt that the reason NFPA outlawed them?

Just my thoughts.

Michael T
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Mike T Thats what I had been told by the factory representative,along with helping to contain and collect the grease they are designed to collapse and cut off air flow. These are the Aluminums Im speaking of. Not the Stainless or the Galvanized. I think we are on the same page now.
 
I think it's been pointed out here that aluminum has a lower melting point and breaks down with harsh chemical. You can soak SS filters until the chemical evaporates and it will not effect the composition of the metal.

The effort involved in cleaning aluminum compared to stainless is much different as well.

I like to sell my customers quality. We clean hoods, and recommend the highest quality of product for our customers needs. I give them all options for filters and highly recommend to go stainless....painless stainless. I think more on the residuals of service than sales. If my customer finds out over a short time I sold him 4 sets of $300 filters instead of 1 set of $800 filters, it could be enough to get fired.
 
Sean, you are right it is the next line.
Thank you Josh! I agree with your thinking.
If a filter collapses and cuts off the airflow to the exhaust system it is defeating the premise of NFPA 96 which is to capture and contain the fire within the exhaust system to prevent the fire from spreading to combustibles. This is why dampers are not used!
 
There are 2 trains of thought on this. Contain the fire within the hood rather then let it spread through the duct system. Thus the collapsing of the aluminum.If the fire system does its job it would be contained in the hood rather then spreading into the ducting system where it could very well spread to other portions of the structure.

Second thought is to let the fire run its course through the venting system(hopeing the fire sytem does its job) as not to spread into surronding areas. Keep in mind all mechanical and electrical components have to work properly for this to happen.Such as a signal to be sent to the return air to stop the feed of oxygen to the fire,gas valve should shut down and all concerned electrical appliance should also be shut down.And enough wet chem has to be delivered to the source of ignition.


I previously stated this is what I had been told by the manufacturer.(concerning aluminums)

If the fire system does its job correctly, then in theory the collapse of aluminum would work while working in conjunction with a properly installed fire supression system.Thus preventing spread to the venting system, If not, the aluminums will break down and the fire will run its course through the ventilation system anyway.


So sell everybody Stainless or Galvanized and be done with it.
 
Where are you getting your galvanized filter and how much per filter (20x20) are you paying?
 
I think we discussed the topic of dampers a few weeks back, as to why they aren't used any longer. The idea of leaving the duct open to burn is to allow the fan to pull the fire through the system and not escape to the kitchen area.

If aluminum filters are designed with that in mind then they should not be allowed in hoods.
 
dodsonish said:
$10.30 per filter, plus shipping.
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That's not bad. Just $2 more per filter. Where do you get them from?
 
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