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Mechanical Systems
From Design to Verification
December 11th, 2013
Mechanical Systems – From Design to Verification

•
•
•
•

MF Mechanical System Challenges
Team Based Design
Data Rocks!
Verification

EarthCraft Virginia
MF Mechanical System Challenges
• HVAC – Heating, VENTILATION, and Air
Conditioning
• Also expect dehumidification, operate quietly,
efficiently, fit in small space, be CHEAP, and
not require much maintenance
• Air Conditioners have dehumidification
capabilities, but are not dehumidifiers

EarthCraft Virginia
Equipment Sizing/Selection for High Performance MF Housing

•
•
•
•
•
•

Load Calculations
Bigger is not better
High Performance = ≥1000 sqft/ton
MF heating/cooling loads 6-18 kBtuh
Part load conditions/need for variable capacity
Ductwork – sealed, insulated and within conditioned space

EarthCraft Virginia
Ventilation
• Design for positive pressure or balanced in
our climate zone
• Don’t suck on buildings in our climate zone
(negative pressure/exhaust systems)
• Tenant vs. owner paid

EarthCraft Virginia
MF Dehumidification
•
•
•

Change in Housing – Humidification vs. Dehumidification
Rough-in for dehumidification
Wire to refrigerator circuit to prevent resident tampering

EarthCraft Virginia
Team Based Design
• Owners and Maintenance staff must be at
the table
• Don’t value engineer out all of the project’s
value
• Moisture Management Plan
• Design for the project population

EarthCraft Virginia
“I predict that someday energy will be so important that we
will measure it.” – Henry Gifford

EarthCraft Virginia
LIHTC Housing Study – Energy Impact Study

EarthCraft Virginia
Thank You
Philip Agee
Philip.Agee@EarthCraftVirginia.org

Chris Conway
Chris@ConwayGreenConstruction.com

EarthCraft Virginia

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Mechanical Systems - From Design to Verification 12-11-13

  • 1. Mechanical Systems From Design to Verification December 11th, 2013
  • 2. Mechanical Systems – From Design to Verification • • • • MF Mechanical System Challenges Team Based Design Data Rocks! Verification EarthCraft Virginia
  • 3. MF Mechanical System Challenges • HVAC – Heating, VENTILATION, and Air Conditioning • Also expect dehumidification, operate quietly, efficiently, fit in small space, be CHEAP, and not require much maintenance • Air Conditioners have dehumidification capabilities, but are not dehumidifiers EarthCraft Virginia
  • 4. Equipment Sizing/Selection for High Performance MF Housing • • • • • • Load Calculations Bigger is not better High Performance = ≥1000 sqft/ton MF heating/cooling loads 6-18 kBtuh Part load conditions/need for variable capacity Ductwork – sealed, insulated and within conditioned space EarthCraft Virginia
  • 5. Ventilation • Design for positive pressure or balanced in our climate zone • Don’t suck on buildings in our climate zone (negative pressure/exhaust systems) • Tenant vs. owner paid EarthCraft Virginia
  • 6. MF Dehumidification • • • Change in Housing – Humidification vs. Dehumidification Rough-in for dehumidification Wire to refrigerator circuit to prevent resident tampering EarthCraft Virginia
  • 7. Team Based Design • Owners and Maintenance staff must be at the table • Don’t value engineer out all of the project’s value • Moisture Management Plan • Design for the project population EarthCraft Virginia
  • 8. “I predict that someday energy will be so important that we will measure it.” – Henry Gifford EarthCraft Virginia
  • 9. LIHTC Housing Study – Energy Impact Study EarthCraft Virginia
  • 10. Thank You Philip Agee Philip.Agee@EarthCraftVirginia.org Chris Conway Chris@ConwayGreenConstruction.com EarthCraft Virginia