direct vent wind issues


  #1  
Old 01-05-15, 03:58 PM
J
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direct vent wind issues

We recently installed two Valor direct vent propane fireplaces on the same wall - one on the ground floor and one one the 2nd story/ Both direct vent straight out the wall. Located in a corner (all clearances to spec). The higher unit works fine in all conditions, but the ground floor unit will not operate with any decent wind blowing. Termination cap is supposed to be rated to winds of 80km but clearly not working on lower unit. Any ideas why only one effected, and any ideas to solve asppreciated
 
  #2  
Old 01-05-15, 04:34 PM
B
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What energy auditors call stack effect creates a more positive air pressure on the second floor and a more negative pressure on the first floor or basement. This only happens when there is a temperature difference between inside and outside. That seems to be consistent with the upper one working and the lower one not. Now, the wind does play a big role which can help or hurt, but difficult to draw any conclusions as the wind changes all the time.

Do you have a basement and are there any windows down there? If yes, open one of the lowest windows you have and see if the downstairs unit performs better. Obviously you don't want to live with it this way, but we are looking to see if a shift in that stack effect will improve the drafting.

For the long term, do these gas units have a powered vent option? You will have to excuse my ignorance of gas fireplace units, very rare where I live.

Bud
 
  #3  
Old 01-08-15, 03:30 PM
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Thanks for the thought. Opening a window doesn't help (I did try even though it show;don't effect these - they draw combustion air from outside and are :haughty. "sealed" units
 
  #4  
Old 01-08-15, 04:12 PM
B
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Being sealed combustion you are probably on the right track, wind and the cap. Each house will develop high and low pressure zones around it when the wind blows. Accomodations for that are difficult at times. Nothing else comes to mind, sorry.

Bud
 
 

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