you might want to check over on the appliance forum. there is a ton of information there on hoods. Almost too much....

Thanks!

I was going to ask the exact same question this evening, but about a Viking 6x propane rangetop. I'll check the appliance forum, but also post here, as we don't chat w/the players until tomorrow late pm.
5 x 13,500 = 67,500 + 16,600 = 84,100 / 100 = 841 actual CFMs. They say each lung is 300 CFMs which is effectively 450.
I would rather have the xtra CFM horsepower, and run the fan on lower settings if needed.
Do we need 2 lungs, or 3?
That will be my question to him tomorrow, and to you this evening. Let me know your thoughts from experience - thanks!

VentaHood's claim that their blowers are "equivalent" to something 150% more is pure hype. There may be less pressure losses through their "squirrel cage" design than through plugged filters, but for planning purposes, I would assume that 300 cfm is only 300 cfm. That is what your code requirements are based on.

Does your range's installation guide mention a recommended vent capacity? My DCS recommended 600 cfm, so that is what I got. That is what my HVAC guy based his quote on, and he didn't care what brand I bought or what its advertising claimed. He wouldn't even quote me on anything larger (said, "Don't go there, lady!"), and since I required heated make-up air anyway, my venting ended up costing wayyyyy more than my range, fridge, and DW combined. If you can afford more capacity than is required, well, that is your choice. But I found "just enough" venting a huge cost to absorb.

MB

I would first start with the installation of the hood - How it is installed will dictate the CFM's regardless of what the manufacturer states the CFM's are. The are listed by the best possible application - which means straight out, no bends, no long ductwork.
If you are making 90 degrees turns & venting through 2 floors & out an attic you significantly diminished any hood's CFMs
-If you are still in the design phase, I would recommend consideration of the range on an exterior wall which provides the most efficient options of venting.

2nd - The way you cook will drive the choices & decisions - Do you do Stir fry in a Wok - how many burners will you be using at one time

I would not go by a hood that is rated x but is supposedly y - there is a way to verify cfms.

Recommended Rating
# Experts recommend that your range hood vent at the rate of 100 CFM for every 10,000 BTUs your gas stove generates. For example, if your stove is rated at 80,000 BTUs, then the range hood fan should move 800 CFM

I would contact Wolf directly to assist your decision making

best to you

Here is a link that might be useful: range hoods

I had Ventahood before and wouldn't recommend it. The problem is cleaning the lung. First you need to take some screws out. Sounds easy but you need to extend your body 2 feet forward to be close to the wall. Then you'll need to take the lung out. Again, since your body is in a somewhat unnatural position, you'd better be careful not to drop it on your cooking surface. Finally, you'll need to clean the lung. There are many metal pieces that are close to each other and you'll have to clean each and every one of them.

Maybe I make it sound overly difficult but I don't think anybody can make it sound as easy as "take the filters out and put them in DW."

I have the 36" pro range top - since my hood was going to be
hidden behind a mantel type cover, I went with the viking liner as I thought it had more to offer than the wolf liner.
I went with the 42" liner - with heating lamp, two lights on dimmers, and chose the highest fan they had to offer with
regard to the blower I had to purchase as well. I also liked the baffles better.

i bought a sirius hood to go over my wolf range top. neither has been installed yet, so i can't really offer you my opinion, per say, but can tell you what led to my decision. The hood is 1200 CFM's, seems to be a quality product and half the cost of the wolf (it was also less expensive than the vent a hood one, and according the the salesman, quieter...can't vouch for that, though.) The filters can be easily removed and washed in the dishwasher.

Recently completed my kitchen and have a 48" BlueStar range (total BTU output is around 130,000). Installed a Prestige 46" 1200CFM liner in a 54" x 24" custom hood. The bottom of hood is 32" off the range and the liner is recessed in 4". Flue goes up about 2' and then a 90o bend to the outside

The combination of hood capture area/depth and the flow allows to cook very smokey foods on the front high output burner and nothing goes into the kitchen (neighbors get to smell what I am cooking though!).

Prestige technical support recommended the hood to overlap the front burner and they were spot on; the smoke does get pulled in at little by the 1200CFM power but having the larger hood ensures everything is captured.