American Aldes Aldes SIP Ventilation Design Guide

							Section 2       Page 21
2.2 CONTINUOUS SUPPLY
• A fan brings in outside air directly 
•  Creates positive pressure in the building 
•  Can direct where the fresh air is introduced into habitable 
zonesCentral Supply Fan
Fresh Air 
Inlet
Air Flow
Air Infiltration
Positive Air  Pressure
Negative Air  Pressure
Supply Ventilation
Types of Equipment*
In-Line Filtering Fan                
(FSVS) In-Line Filtering/Distributing Fan 
(DSVS) Multi-Port Blending/Filtering Fan 
(BVS)
*Remote-mounted fans are preferred for noise-free operation
Pros
• Directly filters outside air
•  Quiet-to-silent operation
•  Moderate cost
•  Positive pressure can prevent unwanted infiltration and subsequent contaminant introduction into 
the building, especially from attached garages
•  Can offset negative pressure from appliances and stack effect
•  Good for Climate Zones 1, 2A, 2B, 3A, 3B, 3C, 4A, 4B, 4C, 5A & 5B (see pages 12-14)
Cons • Separate exhaust fans are still required for bathrooms and kitchens
•  Not suitable for use in very cold climates
•  Cannot use in Climate Zones 6A, 6B, 7A, and 7B (see pages 12-14)
•  Warm, moist air will condense on cold surfaces in walls and leakage areas in building envelope
Residential SIP Ventilation Modification Design Guide   
						

							Section 2       Page 22
2.3 BALANCED VENTILATION
• Brings in outside air directly and exhausts stale 
air simultaneously 
•  Creates neutral pressure in the building 
(depending on ducting) 
•  Good for source-contaminant removal and 
directing the distribution of fresh air introduction
•  A Heat or Energy Recovery balanced ventilator 
recovers from the exhaust air a portion of the 
energy used to heat and cool the building and 
transfers that energy to the fresh outside airSupply
Supply
Kitchen 
Range 
Hood
Supply
Return
Return
Hallway 
Exhaust
Common Area 
Exhaust
Bath 
Fan
HRV 
Damper
FilterAir Handler
Bath 
Fan
Outside AirInside Air
Types of Equipment
HRV – Heat Recovery Ventilator ERV – Energy Recovery Ventilator
Differences Between Heat Recovery Ventilators (HRV) and Energy Recovery Ventilators (ERV)
Choosing  between  an  HRV  and  an  ERV  is  not  always  straightforward.  It  depends  on  many  factors  –  
house square footage, number of occupants, tightness of the building envelope, and climate, among 
others – but the presence of outdoor humidity is often the deciding f\
actor. 
The map at right shows that an ERV is the best choice for the hot and humid conditions of the southern 
United States. An ERV is more cost effective when paired with an air conditioner. In very cold climates, 
there is not enough difference in moisture levels between indoor and outdoor air for homes to benefit from 
the moisture-transfer capabilities an ERV. 
Areas  that  experience  cold  winters  and  warm  summers  are  candidates  for  an  HRV  or  ERV.  Specific 
instances, such as indoor relative humidity problems, can make one more suitable than the other . 
 
HRV/ERV Climate Zone Recommendations 
(See climate zone descriptions on pages 12-14 and map on page 23)
HRV 2B, 3B, 3C, 4A, 4B, 4C, 5A, 5B, 6A, 6B, 7A & 7B
ERV 1, 2A, 2B, 3A, 3B, 4A, 4B, 5A, 5B, 6A & 6B
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							Section 2       Page 23
HRV/ERV Climate Zone Recommendations
HRV
HRV or ERV
ERV
Pros of Balanced Ventilation• HRV/ERV pays for itself in the long run through energy savings
•  Filters outside air directly
•  Quiet-to-silent operation
•  Neutral-to-slight pressure offset (if desired)
•  Addresses the requirement for bathroom exhaust (with limitations)
•  Can offset negative pressure from appliances and stack effect
Cons of Balanced Ventilation • Plumbing required for condensation drains (in HRV)
•  More maintenance requirements
•  Higher installed cost
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							Section 3       Page 24
SECTION 3 
CLIMATE DESIGN RECOMMENDATIONS
5 5
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3
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003500480056004C0047004800510057004C0044004F00030036002C0033  
						

							Section 3       Page 25
3.1 DESIGN RECOMMENDATIONS: CLIMATE ZONE 1
Climate Zone 1A, Very Hot/Humid – Also known as tropical. Temperature is constantly high and does 
not vary greatly from day to night. High heat and humidity levels make thunderstorms common.
Thermal Criteria: 9000 < CDD 50°F*
*CDD = Cooling Degree Days
Zone 1
Dry (B)
Moist (A)
Warm-
Humid
Marine 
(C)
Recommended Ventilation Solutions for Climate Zone 1
VZ-IAQ-ERV                                  
See Appendix  I, Table A-4 IAQ-BVS                                  
See Appendix  I, Table A-8 IAQ-DSVS                                        
See Appendix  I, Table A-7 IAQ-FSVS     
                                    
See Appendix  I, Table A-6
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							Section 3       Page 26
TYPICAL VENTILATION SCENARIOS IN SINGLE- AND MULTI-FAMILY HOMES: ZONE 1
• SCENARIO #1 EXISTING CONDITIONS
Central Ventilation System: No
Central AC/Heat: No  
Recommended Ventilation Modifications
OPTION A   
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  Register  Terminals  (ZRT), 
Constant Airflow Regulators (CAR), or balancing dampers.
See VentZone
® IAQ with Energy Recovery Kits in Appendix I, Table A-4. 
OPTION B
Install a fully ducted supply ventilation system (IAQ-BVS, IAQ-DSVS, IAQ-FSVS) to provide 
continuous  supply  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 Supply Ventilation  – See Ventergy
® Series Continuous Duty 
IAQ Ventilation Kits in Appendix I, Tables A-6, A-7, and A-8.
Local Exhaust – See VZ, SBFK, and MBFK in Appendix I, Tables A-9, A-10, and A-11.
•  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
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  regulated  by  using  Zone  Register  Terminals  (ZRT), 
Constant Airflow Regulators (CAR), or balancing dampers.
See VentZone
® IAQ with Energy Recovery Kits in Appendix I, Table A-4. 
OPTION B
Install a fully ducted supply ventilation system (IAQ-BVS, IAQ-DSVS, IAQ-FSVS) to provide 
continuous  supply  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.
Residential 6,3 Ventilation Modification esign *uide  
						

							Section 3       Page 27
Whole-House Continuous Supply Ventilation – See Ventergy® Series Continuous Duty 
IAQ Ventilation Kits in Appendix I, Tables A-6, A-7, and A-8.
Local Exhaust – See VZ, SBFK, and MBFK in Appendix I, Tables A-9, A-10, and A-11.
•  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 
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 the AHU. This will result in higher 
operating costs due to the AHU needing to run continuously.  
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  Register  Terminals  (ZRT), 
Constant Airflow Regulators (CAR), or balancing dampers.
See VentZone
® IAQ with Energy Recovery Kits in Appendix I, Table A-4. 
OPTION B   
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  requirements.  Regulate  airflow  with  Constant 
Airflow Regulators (CAR) or balancing dampers.
Whole-House Continuous Supply Ventilation  – See Ventergy
® Series Continuous Duty 
IAQ Ventilation Kits in Appendix I, Tables A-6, A-7, and A-8.
Local Exhaust – See VZ, SBFK, and MBFK in Appendix I, Tables A-9, A-10, and A-11.
   
•  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 
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 the AHU. This will result in higher 
operating costs due to the AHU needing to run continuously.  
Residential 6,3 Ventilation Modification esign *uide   
						

							Section 3       Page 28
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  Register  Terminals  (ZRT), 
Constant Airflow Regulators (CAR), or balancing dampers.
See VentZone
® IAQ with Energy Recovery Kits in Appendix I, Table A-4.  
OPTION B  
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  requirements.  Regulate  airflow  with  Constant 
Airflow Regulators (CAR) or balancing dampers.
Whole-House Continuous Supply Ventilation  – See Ventergy
® Series Continuous Duty 
IAQ Ventilation Kits in Appendix I, Tables A-6, A-7, and A-8.
Local Exhaust – See VZ, SBFK, and MBFK in Appendix I, Tables A-9, A-10, and A-11.
    
    
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							Section 3       Page 29
3.2 DESIGN RECOMMENDATIONS: CLIMATE ZONE 2
Climate Zone 2A, Hot/Humid  – Also  known  as  tropical.  Temperature  is  constantly  high  and  does  not 
vary greatly from day to night. High heat and humidity levels make thunderstorms common.
Thermal Criteria: 6300 < CDD 50°F  < 9000*
*CDD = Cooling Degree Days
Zone 2A
Dry (B) Moist (A)
Warm-
Humid
Marine 
(C)
Recommended Ventilation Solutions for Climate Zone 2A
VZ-IAQ-ERV                                  
See Appendix  I, Table A-4 IAQ-BVS                                  
See Appendix  I, Table A-8 IAQ-DSVS                                        
See Appendix  I, Table A-7 IAQ-FSVS     
                                    
See Appendix  I, Table A-6
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							Section 3       Page 30
Climate Zone 2B, Hot/Dry – Also known as deserts or semi-deserts. Transition areas between humid, 
tropical climates and warm, moderate climates. Characterized by low humidity levels (less than 50% RH) 
and high levels of solar radiation. Overall precipitation is typically low and often falls rapidly over a short 
period of time.
Thermal Criteria: 6300 < CDD 50°F < 9000*
*CDD = Cooling Degree Days
Zone 2B
Dry (B) Moist (A)
Warm-
Humid
Marine 
(C)
Recommended Ventilation Solutions for Climate Zone 2B
VZ-IAQ-ERV                                  
See Appendix  I, Table A-4 IAQ-BVS                                  
See Appendix  I, Table A-8 IAQ-DSVS                                        
See Appendix  I, Table A-7 IAQ-FSVS     
                                    
See Appendix  I, Table A-6
VZ-IAQ-HRV                                  
See Appendix  I, Table A-3 VZ-IAQ                                     
See Appendix  I, Table A-2 IAQ-MPVS                                        
See Appendix  I, Table A-5
Residential SIP Ventilation Modification Design Guide