Family member has a  Harman P61A pellet stove.  When it's running they experience respiratory issues.  I'm assuming that combustion air is drawn in from outside in a closed cycle.  No issues with combustion by-products inside.  Is there air filter that can be installed on the distribution blower to filter and clean the air being blown through the stove??
Thanks!
	
		
			
		
		
	
				
			Thanks!