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Old 06-30-2011, 10:31 AM   #2
donnamatrix
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Default Viessman Boilers

These are very sophisticated, extremely efficient systems. They are also fairly expensive to purchase, install, maintain. Additionally, because they are so sophisticated, they are also fairly complex, and it is imperative that the system be installed and maintained by a person/company who has been certified by Viessman, not just your average HVAC guy. However, overall Viessman is a great system.
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