ALL TOO OFTEN EVERYWHERE I’VE NOTICE THE INSTALLATION OF HIGH EFFICIENCY FURNACES…
EXHAUST PIPE IS LOCATED RIGHT NEXT TO THE AIR INTAKE PIPE !
LEADING ME TO BELIEVE A SMALL BUT STILL SIGNIFICANT INDOOR AIR QUALITY ISSUE COMES UP BECAUSE OF CROSS CONTAMINATION OF EXHAUST COMBUSTION BEING SUCKED BACK INTO THE A HOME.
MIND YOU, YES, EFFECTIVE STATED RATINGS OF MEDIUM TO HIGH EFFICIENCY IS IN THE 85 PERCENTILE RANGE.
STILL THAT LEAVES A GAP FOR THE DIFFERENCE.
CRITICAL QUESTION ???
HOW DO THESE FURNACES RATE OVER TIME ON THE EFFICIENCY SCALES ? DO THEY DEGRADE TO LOWER VALUES AND ARE COMBUSTION EXHAUST PRODUCTS SIGNIFICANTLY HIGHER WITH THE POTENTIAL OF BEING RE-ROUTED BACK INTO HOMES ???
ANSWERS PLEASE !!!
Live~NRGY 
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