I hope he never got the maney for that work. That's the only way they learn

Lawsuit

+erik bergstrom Great video. Near the start of the video you mention "circumference " when I think you meant the "area" of the 8 inch duct should not be reduced ( Pi R squared) As apposed to 2 Pi R) Great video. Things like this make me want to buy your products over your competitors. Are they made in America?

+The Barcode Guy Hello and thanks for writing, Vent a hood is manufactured in Richardson Texas

You will find that vent a hood offers an assortment of roof jacks and wall louvers that feature there own gravity closing flap. The flap on the exterior of the house is the one that's intended to seal your home from the loss of ac and heat for customers that have this concern. These internal flaps serve other purposes including preventing blowback when operating only one blower on a ventilation hood equipped with duel blowers.

We did install one of those spring activated sealed dampers (twice). Mainly because, even though we installed a quality goose neck roof vent with gravity flap, we were able to hear all the outside noises; mowers, neighbors playing in pool, music, air crafts, etc., coming down the duct. We installed one of those sealed dampers into the duct above the above the hood to duct connection. Before completely re-stalling the the hood, we decided to test it out. The damper was great for sounds but when we turned the vent on the damper only opened partially, even at full strength. After troubleshooting with customer service rotating the damper to different positions, was deemed defective. Keep in mind, each time we had to turn it, we had to remove/replace the vent hood! After the replacement came and was installed, the same thing happened. All I could think, was how many people inserted these dampers and then installed their hood, without verifying the damper worked. Waste of money and time!

The problem you say that you had is the result of insufficient air pressure from the range hood fan. This can be easily remedied by simple replacing the fan blade itself with a fan blade that has a steeper angle of the individual fan blades. The steeper angle creates higher air flow because the sharp blade angle will cause that. You see this demonstrated on high volume home fans or swamp fans that have the sharper pitch. The problem with most newer range hoods is simply low pitch fan blades that run quieter. These replacement blades are cheap to buy and install since the motor drive shaft for the fan on most range hoods is standard, around 3-4 millimeters. This fix-it trick is usually known by only experienced tradesmen, either HVAC or general home repairs. Sorry to inform you but you do NOT have to remove the range hood assembly to check to see if the fan is supplying enough air pressure to open the louvers on the spring loaded damper. To see if the fan has good enough blade pitch, all you have to do is remove the grease filter from the range hood and then use a flashlight to look up at the running fan & see if the damper louvers are opening sufficiently. They do NOT have to open anymore than 25 to 30 degree angles. They don't even have to open at 45 degrees angles to allow for sufficient evacuation of air below the range hood. To find the replacement fan blades for range hoods you would search for "range hood replacement fan blades". You'll see all kinds of blades with the sharper angle for increased air flow & increased air pressure to open the damper louvers. Hope this helps enlighten you

@@JudgeBusterGood info on the blades! Sure would have been nice to have been informed on this during troubleshooting. We only removed the hood when we had to reset or remove the damper. The testing was done as you stated with hood in tact, looking up thru the fan. Thanks for the info, I since sold that home and currently looking to install a hood in current home. Feel better armed with more helpful info!

The unit is rated to make a turn in the duct pipe without impacting its power rating,. You will only get into an issue running to many elbows back to back . The unit may run slightly quieter with a straight duct run. This would be the onlt difference between those two scenraios

Bobby Gerber Oh, super, that settles my installation. Your presentation and kind response have been enormously helpful. Thanks again.

In many areas, Including California , its against code. many installer will use it since its easier then getting a flat wall custom transition made. In very short lengths it wont hurt your performance unless the pipe is doing back to back 90 degree turns. It tends to make the sound of the moving air louder,.. These are the only drawbacks I know of

Its ok to go larger with the pipe size

I would suggest reaching out to purcell murray who distributes best products. They will be the warranty agent and can troubleshoot the issue best on there internal flaps. Here is how you locate them www.purcellmurray.com/company/distribution/

@@erikbergstrom451 thanks for your suggestion Erik.

I can only advise you on vent a hood brand products. There are other brands on the market that may tolerate a reducer differently. I would reach out to the manufacturer of the 280 and 260 CFM blowers for there specs.

I go into more detail about the collar direction in this video kzfaq.info/get/bejne/l5-JfZSUvsrIhoU.html basically just creates little air pockets that can make the hood sound a bit louder . You can always go back with high heat metal tape and tape around each joint from the inside smoothing those air pockets so they dont make noise .

stores.ebay.com/Kitchen-Foundry

I would simply recommend taping both the outside and inside of the wall louver with expensive metal tape . I am unaware of any other DIY videos on this subject. For additional information contact the manufacturer of the wall louver and/or ventilation hood you plan to purchase

I would call the distributor of the product in your region of the country and ask them for a list of recommended installers . For a list of vent a hood distributors click here www.ventahood.com/index.php/support/parts-service they will likely have a list of appliance installers servicing your state

You can always increase the diameter of the pipe without effecting performance. You can use a 6 to 8 inch enlarger.

Hello - it sounds like a very challenging rehab. Its hard to get a perfect visual based on this message. There are a few suggestions I can send your way. In los angeles county california and surrounding regions where I live, it is against fire code to vent a cootop into a chimney. For this reason it doesnt pass code from the city inspector, and if they house burned down from a related issue your homeowners insurance likely not cover the damage. I would check with the city inspector in your region to determine if there is any acceptable safe way to go about this. Here is california we are unable. The cabinet above your cooktop should have a metal hood liner inserted inside. If its a wooden cabinet with a blower inside that would would be susceptible to damage from the heat a cooktop generates and would not pass code . Custom vent a hood liners can be fabricated to fit the cabinet above your cooktop/ Contact your vent a hood distributor for instructions on how to get a site servey that involves a sales rep coming to your home and drawing up a quote for a vent a hood line to fit in your existing cabinet/. www.ventahood.com/index.php/support/parts-service

I want to be clear that all range hoods are different/ Our guidelines on the 90 degree turns are specific to vent a hoods with the magic lung that feature an array of motors with a maximum RPM of 1550/. There are other brand hoods on the market with a single blower spinning at a much higher RPM. These models may have a different criteria for handling back to back 90 degree turns and you should contact the manufacturer of the hood for the specifics. It is OK to go larger with your vent pipe and many people with long duct runs will expand the pipe to a larger size. Expanding the pipe to a larger size at the end of a run will not soften the impact of back to back 90 degree turns at the begging of a duct run in my experience. When two 90's are close together the air doesn't have time to smooth out before entering another sharp turn. This is where efficiency is lost.

Hello, The products I sell are not designed to be vented downward. There are products on the market such as downdraft systems that where created to exhaust air downward. Elica Aspire Series ERS636S1, You should know that these systems would not outperform having a canopy above your stove with a duct to the exterior wall. For some situations its the best option depending on limitation in the home to duct upward . PM me for information on reaching a rep for Elica

In California we do not have this requirement.Building codes can vary depending on your region and I recommend reaching out to a local inspector to determine your cities requirements

+Jeffrey Messick I have seen installations that involve a small downturn at the end of a run. We dont recommend traveling and great distance downward/. I would recommend you seek out a local sheet metal supplier and show him the run in a drawing. Since they have had experience with making custom pieces he will be able to advise you what transition to use that will have the least impact or resistance on the exhausting air

The best tip would be to have them watch this video and my other videos in this collection

You can find roof caps with gravity closing dampers. I know vent a hood makes them. I would suggest a cap with a closing damper in this scenario

This www.lowes.com/pd_53068-412H-14_4294937087?productId=3373034

The answer is yes. For additional over the phone assistance on this issue feel free to contact the distributor that handles the region of the country that shipped your item. They are your warranty and support for the hood you bought. They would much rather offer assistance over the phone as oppose to getting a call about warranty on the product if it doesn't perform to your needs,. Here is a list of all the product distributors . One of these companies is in charge of your warranty depending on where you purchased the item from www.ventahood.com/index.php/support/parts-service

Using two 45 degree angle turns is always better the. Using one 90. Degree turn

I have had customers add a gasket strip to there backdraft door to dampen any opening and closing sounds/. I do not have any experience with inline dampers, good or bad. If you do put in a section of ducting that includes dampers I would place it in the attic where it can be accessed . Once the backdraft dampers have years of grease on them they stop opening and closing as well. I would want to be able to access it to service the parts and dampers if you choose that system .

The vent a hood system has a patented internal blower and it sits inside the blower housing to cause the grease to liquefy in the blower housing. For this reason we dont offer any inline motors for other product brands. I would recommend calling the manufacturer of the hood purchased to determine what blower options can be used.

You can always go larger with the exhaust vent. If the new hood required a smaller vent pipe you should replace the pipe and go with the pipe size recommended by the manufacture.

Oh... what I meant was the 340 cfm will be sharing with the 720 cfm instead of installing a completely separate venting system. We were thinking of installing a Y connector where the two ranges will eventually meet to exhaust outside. Thanks again!

There are issues you would run into. Without a backdraft damper you will get exhaust coming back through to the unused hood. You would never be able to run them simultaneous without the exhaust streams fighting each other causing vibration, excessive sound, and backpressure.

although we dont recommend using reducers they can be found on the web from various suppliers. home depot will likely carry a variety of them as well

You can always enlarge the pipe from 6 to 8 inch with no repercussions. Going bigger with the pipe will be no issue

Here is the manufacturers video on make up air. kzfaq.info/get/bejne/hM2oh8int5-aZqs.html They recommend ccb innovations for these systems and they ship direct ccbinnovations.com/

You will notice that many of the hoods on the market exhaust through a collar that ranges dramatically in width and depth. For this reason you will want to stick with a broan product that has a collar matching this broan charcoal kit. You will find that most ductless hoods on the market are designed to recirc the return air into your kitchen as oppose to the attic or crawlspace above the hood since the return air is not completely free from contaminants. Broan may not offer a liner unless the wooden surround allows the recirc air a path back intro the kitchen. I would contact them for more information on this. I would not recommend using any ventilation hood in combination with a charcoal filter.

Thanks Erik, really appreciate your help.

The manufacturer makes a cap with a gravity closing cap. It works on asphalt tile roof designs however it does not work on Spanish tile. A selection of the roof caps is available at ventahoodparts.com

I understand that going through the second floor is not an option. In this scenario Id be looking at venting through the garage to an outside wall. Or you would be need to consider the re-circulation hood options

Vent a hoods have internal flaps, and flaps on the wall louver. Unless there are heavy winds blowing the flaps open the cold air should be limited. You could tape a small weight to your flap if the wind is blowing it open.

The brand vent a hood makes a ten inch outlet, its available at ventahoodparts.com you can also call the manufacturer of your hood and inquire if the make a roof cap. In the case of the t top, you'd be going to a sheet metal fabrication company. These types opf supplier make vent pipe for hvac guys and will make up products from sheet metal such as the t top - they would also make the flange of the roof cap match the pitch of your roof

Yes. just be sure they are not flexible or corrugated as they will create turbulence and also back pressure

you will find that at ventahoodparts.com

@@erikbergstrom451 - -thank you - thank you sir for the info and very quick reply .