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Author Topic: NEC filter price Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-07-2015 11:13 AM                     quote: Justin Hamaker Specifically I would like to find the hard plastic frame with cloth baffles which can be washed and reused. Shaking Head! These are Heppa Filters, they can't be washed. Mark  |  IP: Logged Leo Enticknap Film God Posts: 7474 From: Loma Linda, CA Registered: Jul 2000 posted 05-07-2015 11:28 AM                        quote: Steve Guttag I doubt you are going to find many that want to make washables...nobody wants to clean them and those that do clean filters often do a lousy job. And a clogged filter is very bad. At least with a new filter, you know it is cleaned. At the risk of veering slightly off topic, I got a K & N cotton-based, reusable, washable air filter for my car last year after hearing an infomercial for them on my local radio station. They're a local business - factory five miles down the road - and so even if the thing didn't live up to expectations, at least I'd be supporting local jobs. And at $65 for the filter compared to $15 for the 10,000 mile disposable ones, it'll pay for itself in two years at the rate I drive, even if it doesn't deliver any fuel efficiency benefit. It did live up to expectations - very pleased with it. Acceleration feels slightly better, and the car went from just passing the smog test before last to passing the last one very comfortably. The manual does stress that regular and thorough cleaning is important to maintain performance, though. I'm guessing that it would be possible to make these things for DLP projectors, too, but the danger would be people simply not taking them out and cleaning them, followed by impeded air flow, overheating and cooked DLP arrays. I'm further guessing that in a professional installation situation, it's cheaper to buy new disposables every few months than to pay someone to remove, clean and reinstall reusable filters.  |  IP: Logged Justin Hamaker Film God Posts: 2253 From: Lakeport, CA USA Registered: Jan 2004 posted 05-07-2015 02:50 PM                        quote: Mark Gulbrandsen Shaking Head! These are Heppa Filters, they can't be washed. Do they not work if they are washed? I have done this for several cycles and they seem to be working just fine. They are collecting just as much dust as the disposable paper filters we've used.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-08-2015 06:47 PM                     If they are still working after washing your's are likely not real Heppa Filters. The light engines on NEC are not sealed and the blower immediately above the light engine should really have it's own Heppa on it. Having a light engine cleaned because of dust and popper oil leakage can cost you $2500 at Strong! I have had to pull those that were using the cheapo Strong paper filters and clean what had already built up. Bu the amount of prism cleaning that can be done in the booth is limited. The filters on these projectors are of the utmost importance. Even the crappy filters from Strong leak dust. I've switched all my customers over to the filters from MIT which are tighter fitting and seem not to have dust leakage at all. Mark  |  IP: Logged Justin Hamaker Film God Posts: 2253 From: Lakeport, CA USA Registered: Jan 2004 posted 05-08-2015 08:42 PM                        Mark, here are a few pictures of the filters. I don't know if the NEC projectors still come with these, but they came in the projectors we installed in 2010 and 2011. As I said, I have washed these a couple times using a mild dish soap. So far the filters are intact and show no signs of wear.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-16-2015 09:37 AM                     Still shaking head. You're the guy that changes his oil, runs the old oil through a paper towel to "clean it" and then puts it back in the engine. You have a $60,000.00 projector and you're worried about 30.00 worth of filters.  |  IP: Logged Marco Giustini Film God Posts: 2713 From: Reading, UK Registered: Nov 2007 posted 05-16-2015 05:11 PM                     Some HEPA filters can be washed, not sure about NEC ones - not that it really matters since there are no gaskets to prevents unfiltered air to flow around them - but I second Mark here on the 60k/30 thing!  |  IP: Logged Monte L Fullmer Film God Posts: 8367 From: Nampa, Idaho, USA Registered: Nov 2004 posted 05-16-2015 05:59 PM                     quote: Mark Gulbrandsen old oil through a paper towel to "clean it" ..Remember many moons ago when there was an aftermarket oil filter where one could insert a roll of "T.P." in it so one didn't have to buy new filters when doing oil changes? There was a small town operator over here running a dollar house and he would wait until the vertical bulb in that ORC console would be pitch black since he couldn't justify spending $800 bucks for a new bulb when it was time to be replacing bulbs at at the allowed time over warranty hours..and that 1.6K bulb would have well over 14k hours on it-image was flat, flickering and burnt seal ends!  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-16-2015 09:17 PM                     Monte, You probably remember that I flat out refused to do that guy's conversion because he's such a cheap skate. He had to pay someone to come in from the east coast! Marco, I actually include rolls of very thin foam tape with my filter orders. That seals things up pretty well. I have my customers stick it around the edge of the filter then lay them in place. Also, the MIT filters fit the available space much tighter and have less leakage to begin with. I don't even bother with the filters from Strong any more. Mark  |  IP: Logged Gordon McLeod Film God Posts: 9532 From: Toronto Ontario Canada Registered: Jun 99 posted 05-16-2015 11:06 PM                     well mark i have had the metal filters ( and they are not the ones you pictured) in our machines and i can definetly state they are as clean inside as they were with the original factory supplied filters so so much for that baloney  |  IP: Logged Steve Guttag We forgot the crackers Gromit!!! Posts: 12814 From: Annapolis, MD Registered: Dec 1999 posted 05-17-2015 06:50 AM                     Gord...are you comparing same-same? That is, Mark shows the results of desert air. What is the air like in the booths you've made the comparison? Was it clean air to begin with? Was there a popper near by to give that sticky nasty oily crap?  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-17-2015 10:20 AM                     Around this area even the Barco's with metal filters are basically ineffective. In fact the stuff that gets through is so fine it is like the consistency of talcum powder. Doesn't affect the prism but it DOES affect and shorten the lifespan of just about everything else in the projector. You keep running see metal filters Gord because eventually I'm going to get a good laugh. Those prism's are not sealed and NEC charges $2500 USD just to dismantle and clean one. At least I can't make fun of you re-using your motor oil since you don't drive. Mark  |  IP: Logged Brad Miller Administrator Posts: 17775 From: Plano, TX (36.2 miles NW of Rockwall) Registered: May 99 posted 05-17-2015 12:25 PM                     In dealing with theaters all over the US, I can absolutely vouch for the booth environment dictating if rewashable filters should even be an option. I've seen some Barcos with rewashable filters brought to the point of useless when we are called in to investigate. Too many theater owners say "nobody sees the booth, so I'm not spending a penny on it" and foolishly murder their equipment (and presentation quality) in that mindset.  |  IP: Logged Mark Gulbrandsen Resident Trollmaster Posts: 16657 From: Music City Registered: Jun 99 posted 05-17-2015 05:57 PM                     Exactly Brad! And the metal filters don't murder the equipment right away, they do that over time... I always say... What you don't see in there today will for sure be in there tomorrow. Mark  |  IP: Logged Mike Blakesley Film God Posts: 12767 From: Forsyth, Montana Registered: Jun 99 posted 05-17-2015 09:36 PM                        quote: Brad Miller Too many theater owners say "nobody sees the booth, so I'm not spending a penny on it" I have said that quote, but I was talking about painting the concrete booth floor (which is pretty ugly, but who cares?) We change our filters religiously.  |  IP: Logged

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