Just because it's high efficent doesn't mean it's direct vent. Do you have 2 pipes off each appliance both going outside?  
Personally id frame the sump off with a door and a good seal so you don't have to deal with the panel and a garenteented electrical night mare in a short time 
		
	
		
		
		
		
			
				__________________ 
				250G DD LED SPS  R.I.P. 
 180G LED SPS 
80"x36". 300G custom build  
 
Owner of Mountain Ridge Heating and Gas 
Class A gas fitter, HVAC
			 
		
		
		
		
	
		
		
	
	
	 |