Week 117 - To Vent or Not to Vent - What is your hood like?
beachem
6 years ago
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Russ Barnard
6 years agoRelated Discussions
redroze-what did you decide re: your vent hood?
Comments (5)Thanks for your interest. Well, as I had hoped, I was much relieved about the aisle clearance issue from feedback here on the forum. So, I think layout will stay basically the same, but may take up the idea of moving dish storage to the right of cooktop, thus freeing up the island for other "goodies" like extra microwave &/or prep sink. I really haven't gotten as far as developing "must haves" re: finishes. I already have the 2 "must haves" that I really wanted- that is the 36" gas cooktop & 29", off-center drain Franke sink both of which we bought from appliance store liquidating nearly 2 years ago. We thought we were much closer to actually starting the project then, but the the project got bigger & required architects & permitting, etc. and my mom passed away. So... we're now finally getting going. BTW- those appliances have been sitting in my living room & guest room all this time! The plan is: creamy white perimeter w/ cherry island. Maybe you can weigh in on: whether to have the same countertop for perimeter & island. I had originally thought a darker granite counter beneath the creamy cabs & lighter granite for the darker cherry island. Now I'm thinking is might seem too choppy. Thoughts?? Thanks again for your interest & input!...See MoreWhat happens to the sides of cabinets under your vent hood?
Comments (10)I think it is valid to say that steam and hot greasy air will affect the sides of the cabinets that are exposed next to the hood, and under the hood. And to say that it will affect it visibly and that the impact will come earlier than on any other areas of cabinetry getting affected or ruined by use. This is when you think in terms of decades or many years. I had two kitchens where this happened. In one, the veneer facing aged faster than otherwise. Every year it got worse and made me itch more and more to renovate the whole kitchen. It aged, it bubbled, it rotted, it showed it was time to upgrade the kitchen. In another kitchen, the "ruining" was from a small grease fire that happened before I bought the place. Remember, people, that these exposed wood sides are positioned (believe it or not) almost directly overhead above cooking, flames, smoke, grease. Yuk. In terms of hygiene, ugh. But in terms of fireproof thinking, this is dumb. It's so dumb, it's dumber than anyone could imagine if they were to write a code book on their own. At least build it out of something fire retardant or something cement-ey and tile-ready. Or cover it with a sheet of such material. Class assignment is to write a new code specification and defend it in next week's class, in a 4 to 5 minute presentation....See MoreHood vent path using two duct sizes and venting down
Comments (4)The 4-inch duct was too small for the original plan. Probably an 8-inch would have been needed and then the higher flow rate requirement could be made to put up with a bit more pressure loss than is desirable . Air velocity in the hood ducting should be in the 1000 to 2000 ft/min range. Even if you only put a short length of 4-inch duct in a 10-inch duct path there would be very high pressure loss. (On-line calculators exist for these types of analyses.) And if you used a screaming mimi aerospace blower to get the flow rate at the pressure loss, the duct air velocity would be absurdly high and would try to compete with the blower for noise champion. Venting down and out may not be a violation, so long as your AHJ is OK with the details including slopes, sealing, and access, but such paths tend to be restrictive for various secondary reasons. And it seems you are limited to 4-inches in that direction, if I understood your message. I have no real picture of your kitchen, but if it were my kitchen I would use a 10-inch duct from the hood to the nearest exterior wall that didn't dump onto a deck or an openable window. I'd either enclose the duct with a soffit, or make it decorative. Alternatively the duct would go to a point on the ceiling where an upstairs chase could be added to get the path to the attic where it can deviate as necessary to get to a good position for a roof blower. For reference, I have seen images of wood-everywhere type structures where a hood duct went skyward across the room to the desired point on the roof. This appeared to be at least 20 ft high. Such schemes require stainless steel ducting to look decent. This wouldn't do if the ambience were not rustic. Can you extend the wall studs on the existing wall by 6 inches (cutting out 6 inches of space next to the cooktop) so there is space to have enough duct area?...See MoreVent Hood - Is Vent a Hood the only option?
Comments (8)Wolf specifies (or at least did a decade ago) Broan/NuTone blowers. We can't easily know whether they are exactly the same, or have some additional or tighter requirements imposed. The Wolf hoods are very heavy and nearly perfectly welded. I have not seen a Broan/Best hood for comparison. Slanted baffles allow the grease to run to a collection channel. Steeper than 45 degrees is required of commercial baffles. For residential baffles, the tilt angle allows a modicum of reservoir below the baffles, thereby slightly improving containment over perfectly horizontal baffles. Also, the plume reflectance angle is better suited for flow entrainment if not initially achieved. Lower priced hoods may prove to be noisier if insufficient effort went into the baffle design. My Wolf Pro Island hood (ordered in 2008) was built by Independent, but I understand that Wolf have moved production into Wolf. The drawings in the Wolf Design Guide are the same. I hope it is obvious that on-site performance of a lesser quality hood that one buys and installs is better than a higher quality hood that one doesn't buy. On the other hand, if one can squeak out the necessary funds, more happiness (or less annoyance) is likely with the higher quality selection. The Blue Star will be more of a monument than a cooking tool if it can't be operated at full power for aesthetic or health reasons....See MoreRuss Barnard
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