Installation - Field Controls ventCool Instructions Manual

SIZING, SEALING, AND INSULATION OF COMPONENTS AND DUCTWORK:
Sizing of Dampers and Ducts: All three ventCool™ dampers and associated fi ttings and ductwork should Sizing of Dampers and Ducts:
be sized as large or larger than trunk return duct sizes as required by applicable local HVAC code, ACCA Manual D as
applicable, or the authority having jurisdiction, as required for return plenum sizing
outdoor air intake portion of the ventCool™ system essentially becomes a substitute for the return trunk duct
or plenum when it is activated. The recommended design velocity in such ductwork is 600 feet/minute or less
Separate mechanical ventilation systems and associated ductwork installed for the sole purpose of meeting
ventilation codes and standards (such as ASHRAE 62.2) should be sized, sealed and insulated according to the
manufacturer's installation instructions.
Insulation and Sealing of Dampers and Ductwork: Insulation and Sealing of Dampers and Ductwork:
ductwork, and return plenum/trunk ductwork downstream of the outdoor air intake duct junction should
be sealed and insulated as required by applicable local HVAC code for fresh air inlet ducts for the space in
which they are located, or as otherwise required by applicable local code. The Relief Damper and relief
ductwork should be sealed sealed and insulated
the space in which they are installed, or as otherwise required by local code or authority having jurisdiction.
IMPORTANT: Ensure that insulation, draw ties, tape etc. do not interfere with motion of the damper shafts. IMPORTANT: Ensure that insulation, draw ties, tape etc. do not interfere with motion of the damper shafts.
Ventilation Cooling Outdoor Air Intake Sizing: refer to California Energy Code (CEC) Title 24 Residential Compliance Ventilation Cooling Outdoor Air Intake Sizing:
Manual for guidelines for installation and sizing. The total open area of the outdoor air intake(s) must be of
suffi cient size for their type and design; air inlet openings are often the greatest factor aff ecting pressure
loss and fl ow rate in air ducts, and their characteristics must be taken into account in duct fl ow calculations.

INSTALLATION:

Outdoor Air Inlet Termination(s): Outdoor Air Inlet Termination(s):
inlets as described in National Fuel Gas Code ANSI Z223.1, NFPA 54, NFPA 31, ASHRAE 62.2 appendices, and
all applicable local codes.
contamination, such as appliance exhaust vents, gas meters, oil or gas storage tanks, garbage containers etc.
Outdoor air intakes should be located upwind of the attic vents or dedicated Relief Outlet Termination as much as
possible, to minimize cross-contamination of the intake with the relief air being exhausted from the building.
Outdoor air intakes may be of the following types, with the given considerations: Outdoor air intakes may be of the following types, with the given considerations:
• Through the roof/false chimney: Through the roof/false chimney: roofi ng systems may retain signifi cant heat and may elevate the intake air
temperature above that of other types, especially if not suffi ciently elevated above the roofl ine. Typically
the least aff ected by wind loading although high winds may create a signifi cant pressure loss depending
on design.
• Gable end: Gable end: wind loading may signifi cantly aff ect air fl ow rates, depending on wind direction while the
system is active.
• Hip extension/dormer: Hip extension/dormer: wind loading and roof heat may be factors, especially with a hip extension.
• Roof Eyebrow: Roof Eyebrow: wind loading and roof heat may be signifi cant factors.
• Soffi t vents: Soffi t vents: roof heat may be a factor if located on a downwind side of the building; also wind loading
may be a factor.
Multiple outdoor air intakes may be combined to provide adequate open area for air fl ow while reducing the size
of the intakes.
Relief Outlet Termination: Relief Outlet Termination:
debris intrusion. An attic location is highly recommended for cooling of the attic space and roof structure.
Refer to CEC Title 24 Residential Compliance Manual, Tables 4-20 and 4-21 for guidelines on ventilation of the
attic to outdoors. If an attic location is not feasible, termination locations as given for the outdoor air intake may
be preferred; if so, wind loading will tend to be an even more signifi cant factor while roof heat is of lesser concern.
The recommended design velocity in such ductwork is 600 feet/minute or less.
insulated as required by applicable local code for return trunk ductwork for
Outdoor air intakes should be regarded and considered as forced air
Intake termination shall be located away from possible sources of fumes and
Maximum ¼" screen or mesh size is recommended for protection from animal/
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return plenum sizing. The Ventilation Cooling
The Ventilation Cooling Damper, outdoor air intake