quattroworld.com Forums: You might not want to go above 600cfm anyway. If you do, by code, I think you need....

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You might not want to go above 600cfm anyway. If you do, by code, I think you need....
Posted by: Pablo (699) on 2015-05-29 22:00:00 In Reply to: Are there any microwaves that have a CFM higher than 600??? posted by iconoclast on 2015-05-18 20:08:11	Share \| Report

to start worrying about make up air.

Also, I have a 600cfm hood and not far away is a zero clearance, wood burning fireplace. A few times the fireplace was pulling a negative draft and I did a bad job getting it started, which put a fair bit of smoke into the house. 600cfm was enough to get it cleared out in a few minutes.

Thread:

Are there any microwaves that have a CFM higher than 600??? - iconoclast 2015-05-18 20:08:11 (205 views)
- talked the mrs into the dedicated hood vent and having the microwave built into a peninsula... - iconoclast 2015-05-26 20:57:06 (116 views)
  - A lot better long term too. - Pablo 2015-05-27 11:32:14 (122 views)
    - good call... - iconoclast 2015-05-28 23:05:58 (110 views)
  - Nice. Sounds like a win to me. - schlepper 2015-05-26 22:42:32 (102 views)
    - same here... - iconoclast 2015-05-28 23:06:17 (95 views)
- Another issue is that microwave may not be able to go above a high btu range. - schlepper 2015-05-19 22:35:34 (140 views)
  - my friend told me the same thing... - iconoclast 2015-05-26 20:58:10 (113 views)
- A little fabricating needed but this is 1654 CFM - ragdoll 2015-05-19 14:16:40 (179 views)
- You might not want to go above 600cfm anyway. If you do, by code, I think you need.... - Pablo 2015-05-29 22:00:00 (202 views)
  - Our downdraft is 1100 cfm...no odors at all - TheLex 2015-05-19 22:50:39 (160 views)
  - I'd be concerned with a 300CFM fan in a tight house - gription 2015-05-19 15:24:29 (167 views)
    - My house is spray foamed. If it's that tight, you're running an exhaust fan all the time anyway. - Pablo 2015-05-19 20:51:53 (152 views)
    - I'm currently working on an ultra-tight SIPS panel house and 300 CFM is the limit for us.... - irish21 2015-05-19 15:35:39 (172 views)
      - You might end up needing multiple HRV units.  -  gription  2015-05-19 16:54:19 (191 views)
        
        We're hoping to find the right hood or perhaps have one made.  -  irish21  2015-05-20 10:12:25 (145 views)
        
        Yup, he'll have to have an HRV.  -  Pablo  2015-05-19 20:52:53 (168 views)
        
        There's already an HRV spec'd by an engineer. 300 CFM exhaust is the limit at the current sizing.   -  irish21  2015-05-20 10:13:07 (140 views)
      - Put some elbows on the vent line. Make a pretty art thing. - Seattle_Scott_inside_a_Virtual_Machine 2015-05-19 16:51:46 (133 views)
- the best microwave is a poor fan. mine is 300 CFM and was "strong" four years ago...600CFM? - Seattle_Scott_inside_a_Virtual_Machine 2015-05-18 23:35:31 (174 views)
  - i have a 8" duct right now however... - iconoclast 2015-05-18 23:54:24 (168 views)
    - How about an outside booster fan? - Coloradomark 2015-05-19 10:37:06 (147 views)
    - my BIL / sister put in a microwave drawer for their remodel. - Seattle_Scott_inside_a_Virtual_Machine 2015-05-19 00:11:46 (189 views)
      - i didn't even know this item existed until now... - iconoclast 2015-05-19 00:46:42 (175 views)
        
        There are slso double wall ovens with microwave function if you're doing cooktop/ovens... - irish21 2015-05-19 12:09:52 (161 views)
- Do you have any idea how loud that would be? - freakness 2015-05-18 20:48:32 (145 views)
  - That's why there is no substitute for a proper vent hood. - gription 2015-05-19 09:28:27 (167 views)
  - i have a broan 800 cfm fan currently and it is tolerable and not as loud as other models that... - iconoclast 2015-05-18 23:44:08 (165 views)
    - a fan isnt blowing all that wind past the guts of a microwave - Seattle_Scott_inside_a_Virtual_Machine 2015-05-18 23:49:19 (147 views)
      - valid point... - iconoclast 2015-05-18 23:55:16 (171 views)
        
        The quietest hoods have external blowers close to the exhaust. - irish21 2015-05-19 11:02:17 (148 views)

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