Ben Bogie | August 15, 2017

details // HVAC & Mechanicals

A Simple Balanced Ventilation System


Two fans talk to each other to replace stale air with fresh air


Tight little houses need mechanical ventilation to keep the air quality good. In Professional Remodeler’s 2017 Model Remodel, Ben Bogie designed a no-nonsense balanced system based around two six inch ducts. 

  • One duct begins outside and pulls fresh air into the basement through a programmable supply fan. The fan can exclude extremely hot, cold, or humid air from being drawn in. 
  • The supply fan pushes air up through the other duct to a branch box in the attic, where it is distributed around the house.
  • Dumping air into closets helps to temper it, and cuts down on potential drafts.
  • Not only does the range hood exhaust cooking smoke, it also operates continuously on a low flow—synchronized with the supply fan.
  • Spot exhaust is provided over the shower to take care of concentrated loads.

Simple, affordable balanced ventilation

Thank you to Allison Bailes, Ph.D. for some early technical insight.


I've got an even better idea:  crack open a few windows, weather permitting of course.  Save electricity, cut down on global warming.



It was a comfortable 70deg out the other day, low humidity, and I went out to my back yard to enjoy it. I had to go to the park because every single one of my neighbors condensers were seemingly operating at full blast. I will be happier once thermostats learn to open windows.

Weather has been really beautiful around here the last couple of weeks. i spend as much time outside as I can. I remember the days when windows could be opened to let comfortable air in ... even the Empire State Building had operable windows(sort of- at least as operable as 75 year old windows could be) up until it was "Green Retrofitted a few years ago..

Seems like we can't do anything without an engineers stamp and an app to operate anything..... but we are "Green" and more efficient......

.... now where is my smart phone.....

Daniel Morrison's picture


No need to lament being able to open the windows in this house! The builder spent the extra money on operable windows, rather than picture windows with muntins, mullions, and sash frames glued on to look like *actual* operable windows. 

In fact, he chose casement windows because when they close, they close tightly. This is different from double-hung windows, which just close tight-ish.


If you are wondering whether tight houses are a bad idea or a good idea, read this little post.

Thanks for your comments,


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