Here's how to PROVE high efficient boilers are not efficient?

**THEY** say a lower stack temperature (flue gas) increases efficiency and therefore likewise a *higher* stack temperature decreases efficiency.
Here's how to prove high efficient boilers are not efficient?
In winter remove the outside air vent intake and point it to inside the boiler room:
If the air leaving the chimney is IMMEDIATELY very very hot (therefore the stack and flue gas temperature has increased) then you have your answer (hopefully the 3 inch plastic chimney won't melt on you).
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snipped-for-privacy@hotmail.com wrote:

Why the little old government doesn't make any money at all when everyone ones fuel prices go up, or when every single citizen spends $20,000 for new high efficiency windows or $10,000 for new high efficiency furnace....no....no money at all (tax included)...heck they even give you a nifty $100 rebate coupon!!!!
40 million consumers times fuel price hike, times new windows, times new furnace = .......
no it's better to be honest and not gain all that money much much better, in fact every year with a dying baby boom these consumers are spending more and more and more then they did in the last 40 years (their houses to heat get bigger by themselves).
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http://www.reedlink.com/SingleArticle~ContentId~60859~pub~IM~Product~Network.html
Quote: "If the heating system does not allow flue gases to condense, then purchasing a condensing boiler would not make economic sense because the system would not be able to run at peak efficiency."
Although they are wrong about the condensation temperature for natural gas which is 120F since cast iron run at 120F and above without rust from condensdation.
snipped-for-privacy@hotmail.com wrote:

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