American Aldes Aldes SIP Ventilation Design Guide

Section 3       Page 41
• SCENARIO #4 EXISTING CONDITIONS
Central Ventilation System: Yes
Central AC/Heat: Yes
 
 
Recommended Ventilation Modifications
Ensure the existing ventilation system provides whole-house continuous ventilation, and that 
local exhaust ventilation meets recommended airflow rates. If not:
OPTION A   
Zone 3A – Install a fully ducted Energy Recovery Ventilator (VZ-IAQ-ERV) to provide general 
ventilation.  Duct  to  bathrooms  and  kitchen  if there is no local ventilation already...

Section 3       Page 42
3.4 DESIGN RECOMMENDATIONS: CLIMATE ZONE 4
Climate Zone 4A, Mixed/Humid – Mixed, humid climates experience all four seasons, but season length 
and extremity vary by location. These regions receive more than 20 inches of rain annually. The average 
winter temperature typically drops below 45°F. Summers can be extremely hot and humid. Many of these 
regions will experience some snowfall and icing during winter months.
Thermal Criteria: CDD50°F ≤ 4500 and 3600 < HDD65°F ≤ 5400*
*CDD...

Section 3       Page 43
Climate Zone 4B, Mixed/Dry – Mixed, dry climates experience seasonal temperature variations and 
typically experience all four seasons. Season length and extremity vary \
by location. These regions 
typically receive less than 20 inches of rain annually.
Thermal Criteria: CDD50°F ≤ 4500 and 3600 < HDD65°F ≤ 5400*
*CDD = Cooling Degree Days, HDD = Heating Degree Days
Dry (B)Moist (A)
Warm-
Humid
Marine 
(C)
Zone 4B
Recommended Ventilation Solutions for Climate Zone 4B
VZ-IAQ-ERV...

Section 3       Page 44
Climate Zone 4C, Mixed/Marine – Temperate climates found on the coast. These areas typically do not 
have extreme seasons. Temperatures remain relatively mild year-round due to the high heat capacity of 
water. Marine climates only experience two seasons, summer and winter. Summer months are dry, while 
winter can be very wet. To be considered a marine climate, 65% of annual total rainfall must occur in less 
than six months of the year. These climates are generally humid, but...

Section 3       Page 45
TYPICAL VENTILATION SCENARIOS IN SINGLE- AND MULTI-FAMILY HOMES: ZONE 4
• SCENARIO #1 EXISTING CONDITIONS
Central Ventilation System: No
Central AC/Heat:  No
    
Recommended Ventilation Modifications
OPTION A
Zone 4A – Install a fully ducted Energy Recovery Ventilator (VZ-IAQ-ERV) to provide general 
ventilation.  Duct  to  bathrooms  and  kitchen  if there is no local ventilation already in place . 
Ensure the system is balanced and the airflow is regulated by using Zone...

Section 3       Page 46
• SCENARIO #2 EXISTING CONDITIONS
Central Ventilation System: Yes
Central AC/Heat:  No
   
 
Recommended Ventilation Modifications
Ensure the existing ventilation system provides whole-house continuous ventilation, and that 
local exhaust ventilation meets recommended airflow rates. If not: 
OPTION A   
Zone 4A – Install a fully ducted Energy Recovery Ventilator (VZ-IAQ-ERV) to provide general 
ventilation.  Duct  to  bathrooms  and  kitchen  if there is no local ventilation...

Section 3       Page 47
• SCENARIO #3 EXISTING CONDITIONS
Central Ventilation System: No
Central AC/Heat: Yes
    
 
Recommended Ventilation Modifications
Ensure the existing ventilation system provides whole-house continuous ventilation, and that 
local exhaust ventilation meets recommended airflow rates. If not:
OPTION A  
Zone 4A – Install a fully ducted Energy Recovery Ventilator (VZ-IAQ-ERV) to provide general 
ventilation. Alternately,  duct  the  supply  air  from  the  ERV  to  the  return  of...

Section 3       Page 48
Zone 4B & 4C – Install a fully ducted exhaust ventilation system (VZ-IAQ or IAQ-MPVS) 
to  provide  continuous  exhaust  ventilation.  If  bathroom  and  kitchen  fans  are  not  already  in 
place, install an intermittent exhaust system (VZ, SBFK, MBFK) to meet local ventilation 
requirements. Regulate airflow with Constant Airflow Regulators (CAR) or balancing dampers.
Whole-House Continuous Exhaust Ventilation – See VentZone
® IAQ Continuous Exhaust 
Ventilation Kits in...

Section 3       Page 49
OPTION B
Zone 4A, 4B & 4C – Install a fully ducted supply ventilation system (IAQ-BVS, IAQ-DSVS, 
IAQ-FSVS) to provide continuous supply ventilation. Alternately, duct the supply air from the 
ventilator  to  the  return  of  the AHU. This  will  result  in  higher  operating  costs  due  to  the AHU 
needing to run continuously.  
If bathroom and kitchen fans are not already in place, install an intermittent exhaust system 
(VZ,  SBFK,  MBFK)  to  meet  local  ventilation...

Section 3       Page 50
3.5 DESIGN RECOMMENDATIONS: CLIMATE ZONE 5
Climate Zone 5A, Cool/Humid – Mixed, humid climates experience all four seasons, but season length 
and extremity vary by location. These regions receive more than 20 inches of rain annually. The average 
winter temperature typically drops below 45°F. Summers can be extremely hot and humid. Many of these 
regions will experience some snowfall and icing during winter months.  
Thermal Criteria: 5400 < HDD65°F ≤ 7200*
Climate Zone 5B,...