Need a new kitchen vent with external blower- or do i?
RKALIDOSS
10 years ago
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deeageaux
10 years agocaliforniagirl
10 years agoRelated Discussions
Can I modify a normal range hood to connect a external blower?
Comments (7)If by "normal" you mean that your hood has an internal blower that blows into vents that are already in place that lead to the outside, then yes. An in-line blower is probably your easiest bet. An external blower usually requires its own housing. All this assumes that removing your existing internal blower does not alter the structural integrity or the air flow geometry of your existing hood. And, of course, the electrical requirements have to be made compatible between your existing hood and the new blower. Make sure the size of your vents are consistent with whatever your new blower specifies....See MoreRange Hood - do I need an external blower?
Comments (5)gemini16, As mentioned above, a "squirrel cage blower works fine for powerful and (relatively) quiet ventilation... a 600cfm internal blower with a squirrel cage and it kicks butt. You are always going to have noise from air movement, no matter where the blower is located... " Just to go back to basics : -- all hoods at a cost higher than the low-end of the market have centrifugal (squirrel cage) blowers. They do a better job than blade fans and are quieter too. -- all air moving makes some noise. Breathe in and out slowly making as little noise as possible and you can still hear "something". In the range of 250 to 400 CFM you may not find baffle filters are quieter than mesh. There are also Other advantages to mesh filters in this range of CFM. At high end of the CFM range, baffles are clearly best. "If i want to vent outside, do I need to purchase an external blower?" - NO, all blowers can send air outside. Some blowers are in-line, halfway between your hood and the outdoors. Most blowers are in the hood. Some blowers can be outdoors ("external") but this is not required in any way. HTH -David...See MoreRange hood - external blower needed?
Comments (4)I don't see why it's necessary. We installed a Zephyr Tempest II hood over our BlueStar RNB range -- 1100 cfm internal blowers -- and we've been very happy with it. This is not an under-the-cabinet model, but a 24" deep tented hood with baffles. Keep in mind that all sorts of things will bear on the efficacy of any given hood and blower unit and the amount of noise it makes. There's the installation, length/volume/#turns for the duct-work, etc., etc. Where you put the blower can make a difference, but much of the noise -- when it's noisy -- is the movement of air through the system. If it's noisy because filters or baffles rattle or even the hood itself, or the duct work is convoluted, then moving the blower will not help. I cannot comment on the unit you're considering. I will say that it's great having adequate (plus) ventilation after years without it....See MoreEXTERNAL vent hood blower motor - need quiet, vibration-free, and MUA
Comments (8)Differential means the difference between the outside temperature and the temperature you want the MUA to be (warmer or colder than outside). CFM means actual hood CFM, and the actual hood CFM will never exceed that provided by all the sources of MUA CFM available at the kitchen. If the differential pressure is zero, then one has perfect MUA (pressure balance) and the hood will only be "gagged" by its own baffles, transitions, and ducting. The achieved indoor-outdoor differential pressure won't generally be zero, but it can be kept modest relative to changes on the fan curve. Aim for 90 hood CFM per square foot of hood intake aperture. This should provide complete containment for most cooking for captured plumes using residential hoods with baffles. (Plumes are initially captured if the hood aperture overlaps them.) So, for a desired/required 800 CFM, say, one finds 800 on the abscissa and goes up to a differential temperature curve representative of an outdoor and indoor temperature difference, and thence left to the ordinate where the BTU/hr needed is listed, based on the specific heat of air and the mass of air being moved at that CFM. BTU/hr has a counterpart watts value for electric heating, and also a tons of air conditioning value if one intends to cool. Conversion factors may be found by use of an Internet search engine....See MoreSparklingWater
10 years agoliriodendron
10 years agoRKALIDOSS
10 years agodeeageaux
10 years agoattofarad
10 years agoJARO INTERIORS, INC.
5 years agojoe spad
5 years ago
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