06-06
walls with new insulation is expensive; however, it should be
evaluated if economically and technically feasible.
The existing
single pane windows shall, however, be replaced by insulating double
pane windows ("U" factor 0.5 & Shading Coefficient 0.5) as a part of
the major renovation effort involving heating, mechanical cooling,
and winter humidification.
6.3 DESIGN FEATURES
In addition to energy studies and decisions made in conjunction with
economic analysis, the following features shall be incorporated
without the need for an economic analysis.
A. Air conditioning systems shall be designed to operate below 48oF
outdoor temperature without refrigeration.
B. For all locations where the outdoor winter design temperatures are
below 30oF and the winter degree days are in excess of 3000, heat
recovery devices, comprising of either air to air plate heat
exchangers or glycol run around loop heat recovery coils, shall be
installed in all 100% outdoor air systems with capacities in excess
of 3000 CFM. The exhaust air systems, from which the heat is to be
extracted, and shall be of continuously operating type. Controls
shall also be designed to avoid overheating the outdoor air during
mild or warm weather and prevent icing of the exhaust air coil below
32oF ambient air temperatures.
C. ENERGY EFFICIENT MOTORS: Refer to the VA Standard Detail 618 for
application and schedule.
7. DOCUMENTATION AND MISCELLANEOUS REQUIREMENTS
7.1 GENERAL
Refer to Article 10, APPLICABLE CONSTRUCTION STANDARDS AND REFERENCE
DOCUMENTS INDEX for the applicable requirements. To avoid any
confusion and dispute, nomenclature on the drawings shall correspond
exactly to nomenclature in the VA Master Specifications.
7.2 SPECIFIC REQUIREMENTS
A. General Notes, Abbreviations, Symbols.
B. VA Standard Equipment Schedules.
Include schedules for existing air
handling units, fans, pumps, etc., that will require alteration or
rebalancing.
C. VA Standard Details and other special details, if deemed necessary.
D. Flow Diagrams for Air Supply, Return and Exhaust for each HVAC
system.
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