More Thoughts on HVAC...

Posted by : Unknown Monday, August 18, 2014


 
   Let’s start off by saying that volumes of books and papers have been written about energy efficient buildings and systems. When you boil it all down, the HVAC systems are key but the overall common denominator is the effective use of insulation throughout the building. Beginning questions:

What heat sources are available
       -Natural Gas
       -LP Gas
       -Electricity
       -Geothermal
       -Solar
Forced air or not? (If not might mean radiant heat.)

Next is how do you ventilate?
       -The introduction of outside air
       -The number of air changes
       -The circulation
       -The exhausting
     The interior equipment and appliances must be considered. Watch out for air spillage or backdrafting.
     HVAC must be properly signed depending upon clients orientation N.S.E.W, building occupants, building design and flexibility.
     Keep cooling coils and drain pipes clean. Periodically clean the duct interior and replace the filters. If using a HEPA filter system. The furnace has to be designed to pull the air through that specific filter to avoid pressure drop.
     HVAC is greatly affected by the exhaust system. Too much exhaust causes too low pressurization. Too little causes over pressurization. One can over ventilate or under ventilate. A controlled ventilation system can balance your interior air and account for season changes, orientations, and occupant changes.

      -Mark

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