# Presentation: 557731

## Ventilation and Moisture Control:  Equipment and Controls

- 2002 National Workshop on State Energy Codes
- Des Moines, Iowa
- July 17, 2002

## Don  Stevens

- US Trainer, Heating, Refrigeration, and Air Conditioning Institute of Canada (HRAI)
- Principal, Stevens and Associates
- Chairman, Home Ventilating Institute
- Voting Member, ASHRAE 62.2 Committee
- Chairman, Systems Subcommittee of 62.2

## VENTILATION TRAINING

**HRAI has been offering training since the mid ‘80s**
**Training has been delivered to over 500 participants in 9 states:**
**Alaska, Georgia, Maine, Massachusetts, Minnesota, New York, New Hampshire, Oregon, and Wisconsin**
**Total of 5,500 currently certified in ventilation in US and Canada**
**Training offered in partnership with State Energy Offices, Manufacturers, and utilities**
**HRAI was contracted by the State of Minnesota with SEP funds to develop and deliver training on the new State Energy Code to over 1,100 people**
**For more information, contact Joanne Spurrell, Director, Education and Market Development.  Tel:  1-800-267-2231             e-mail:   jspurrell@hrai.ca**

## Slide 4

## Slide 5

## Slide 6

## Codes and Standards

- Washington State Ventilation and Indoor Air Quality Code (1991, updated 2000)
- 1.5 sone max fans or integrated systems operating for a minimum of eight hours a day
- 15 cfm/person plus .01 cfm/square foot; generally 50-125 cfm
- 50 cfm intermittent/20 cfm continuous bath fan
- 100 cfm intermittent/25 cfm continuous kitchen exhaust

## VIAQ Whole House Rates

## Codes and Standards (cont.)

- International Building Code (IBC) (2000)
- 50 cfm intermittent/25 cfm continuous bath fan
- Vented range hood not required if operable window
- International Residential Code (IRC)
- 50 cfm intermittent/25 cfm continuous bath fan or operable window
- Vented range hood not required if operable window

## Codes and Standards (cont.)

- ASHRAE Standard 62.2 (June 2002 draft)
- 1.0 sone max fans or integrated systems operating continuously in most climates
- 3.0  sone max range hoods at 100 cfm/low speed  and bath fans at 50 cfm (pending)
- Backdrafting test required if two largest fans exceed 15 cfm/100 square feet
- Mechanical whole house IAQ ventilation required in most climates
- Fourth Public Review this fall

## ASHRAE 62.2P Required Ventilation Rate

## Ventilation Strategies

- Supply Ventilation
- Exhaust Ventilation
- “Balanced” Ventilation
- Other Equipment

## Supply Ventilation Options

- Integrated with Air Handler
- Inline Supply Fan
- Multiport Supply Fan
- Dehumidifying Supply Fan

## Integrated with Air Handler

- Use air handler to pull in outdoor air
- Advantages:
- distribution
- filtration
- Disadvantages:
- Fan energy
- Cold air on furnace heat exchanger
- Draft complaints

- HRAI

## Inline Supply Fan

- May be integrated with the furnace for distribution
- May have dedicated supply duct(s)
- Advantages:
- Quiet, low energy
- Disadvantages:
- Extra fan
- Must be accessible

- HRAI

## Multiport Supply Fan

- Delivers to several rooms
- Can blend and/or filter air for comfort
- Advantages:
- Quiet, filtration, tempering, multiple grilles
- Avoids air handler temperature shock issues
- Disadvantages:
- More ducting
- Must be accessible for service

## (ALDES BV150 photo)

## Broan G+ photo

## Dehumidifying Supply Fan

- Single unit provides dehumidification, filtration, and ventilation air
- Advantages:
- Multipurpose unit
- Dehumidifies and filters both indoor and outdoor supply air
- Disadvantages:
- First cost, ducting

## (DEC photo)

## Exhaust Ventilation Options

- “Double Duty” Bath Fan
- Remote Inline Exhaust Fan
- Multiport Exhaust Fan
- Quiet Range Hoods
- Remote Inline Range Hood Exhaust Fan

## “Double Duty” Bath Fan

- Quiet bath fan that provides both spot ventilation and whole house IAQ ventilation
- 0.2-1.5 sone fan to increase operation and life
- Advantages:
- Quiet, long life
- no additional fan
- Disadvantages:
- First cost

## (Panasonic fan)

## Remote Inline Exhaust Fan

- Inline fan in attic with one or two pickups
- Remote mounted so fan noise is not an issue
- Advantages:
- Quiet operation if flex duct is used
- Versatile installation; may replace two fans
- Disadvantages:
- First cost, may  be noisy if metal duct is used
- Must be accessible for service

## (Fantech Inline)

## Panasonic Inline photo

## Multiport Exhaust Fan

- Box fan in attic with 3-8 pickups
- Remote mounted so fan noise is not an issue
- Advantages:
- Quiet operation if flex duct is used
- Versatile installation; may replace 3-8 fans
- Disadvantages:
- First cost, may  be noisy if metal duct is used
- Must be accessible for service

## (ALDES MPV200 photo)

## Quiet Range Hoods

- ASHRAE Standard 62.2 calls for quiet range hood fans
- 1.5 to 3.0 sones at low speed/100 cfm nominal
- Advantages:
- Quiet operation at low speed (0.3-3.0 sone)
- Several models available
- Disadvantages:
- First cost

## HVI page photo

## Remote Inline Range Hood Fan

- Can be very quiet
- Moves fan out of room and out of your face
- Advantages:
- Quiet
- Variable Speed
- Disadvantages:
- First Cost
- Must use sound-reducing muffler

## Fantech inline hood Photo

## Fantech hood photo

## “Balanced” Ventilation Options

- Heat Recovery Ventilator
- Energy Recovery Ventilator
- Balanced Supply and Exhaust Fans
- Integrated Heating/Cooling/Ventilation

## Heat Recovery Ventilator

- Primarily used in cold climates
- Typically 60-70% efficient at heat recovery
- Advantages:
- May reduce heating costs
- Reduces drafts
- Disadvantages:
- Highest first cost
- “Cost effectiveness” is hard to calculate

- HRAI

- HRAI

## Energy Recovery Ventilator

- Primarily used in cooling climates
- Typically 70-80% efficient at energy recovery
- Advantages:
- May reduce cooling costs, reduces drafts
- Disadvantages:
- Highest first cost
- “Cost effectiveness” is hard to calculate

## (NuTech ERV photo)

## Balanced Supply and Exhaust Fans

- Uses a quiet exhaust fan and a supply fan
- Fan flows nominally equal to maintain balanced flow
- No heat exchange core
- Advantages:
- Lower cost way to get balanced flow
- Disadvantages:
- Higher first cost for two fans

## Panasonic inline photo

## Fantech attic fan photo

## Integrated Heating/Cooling/Ventilation

- One unit provides all HVAC needs
- Canadian Advanced Integrated Mechanical System (AIMS) Project
- Advantages:
- Single unit, simpler ducting
- Disadvantages:
- First cost, lack of awareness and training

- Typical Integrated System

## Other New Ventilation Equipment

- Through-the-wall inlets
- Fan-Heat-Light options
- Multi-speed fans
- Balancing tools
- Ceiling Radiant Dampers  for fans
- Through-the-wall fans

## Panasonic Passive Inlet

- Through-the-wall inlet

- Quiet fan-light-heater

- Adjustable Iris balancing damper with pressure taps

## Iris w/ mag

- Setting the flow with a gauge

## Iris w/ micro

- Setting the flow with a digital micro-manometer

## Ceiling Radiant Fire Damper

## Through-the-wall fan

## install info

## Ventilation Equipment Selection

- Performance Testing and Certification
- Energy Star Ventilation Equipment
- Utility Promotion
- Codes and Standards

## Performance Testing and Certification

- Home Ventilating Institute
- Ventilation Industry Trade Association
- 85%+ of North American products
- Airflow and sound testing
- Certification program
- Certified Product Directory
- www.hvi.org
- 1-847-394-0150

## Testing and Certification at HVI

- Testing done at the Air Movement and Control Association International  (AMCA) Laboratory in Arlington Heights, Illinois
- AMCA Lab can test ventilation products with airflow from 0 to 40,000 cfm and sound from less than 0.3 sones to over 25 sones

## Testing and Certification (cont.)

- Fans are mounted on a stand for airflow testing
- A calibrated airflow test chamber is used

## Mounting

## Testing and Certification (cont.)

- Fan airflow is monitored automatically by AMCA lab technician
- Measurements taken at a variety of pressures from 0 “w.g. to shutoff of fan at 0.4-0.8”w.g.

## Photo of tech at computer

## Airflow curve

## Testing and Certification (cont.)

- Sound testing is done in a certified sound chamber
- A rotating microphone is used to measure sound power at 24 frequencies
- Sound room is concrete double-wall, isolated from the rest of lab, and “floats” on rubber cushions

## Photo of mounted fan

## Fan mounted in sound room

## Rotating microphone (1 RPM)

## Testing and Certification (cont.)

- Sound measurements are analyzed by AMCA computer software
- Computer averages sound pressure level at 24 frequencies into 8 frequency bands
- Measurement of background noise and a standard Reference Sound Source are taken

## Sound Room computer setup

## Testing and Certification (cont.)

- Final output does weighted average of sone levels at 8 center frequencies
- This determines final sone rating

## Sound report

## Last Page report

## Testing and Certification (cont.)

- The final airflow and sound ratings are submitted by the manufacturer for certification by HVI
- HVI publishes certified results on web site (www.hvi.org) and in hard copy
- Certified Products Directory updated online monthly

## page from directory

## Energy Star Ventilation Equipment  

- Low energy and quiet fans
- Range Hoods max 4.0 sones, 2.8 cfm/w
- Bath fans <75 cfm  max 2.0 sones, 1.4 cfm/w
- Bath fans 75-200 cfm max 1.5 sones, 2.8 cfm/w
- Three year warranty required
- Bath fans, IAQ exhaust fans, & ceiling fans now
- Supply fans, inline fans, multiport fans, and air handlers in next two years
- Website:  www.energystar.gov

## List on EPA website

## Utility Promotion

- Cash incentives for quiet, low energy fans
- $50-125 incentives for 1.5 sone max fans with efficacy of 2 cfm/watt or better
- Program incentives/requirements
- Seattle City Light Build Smart
- 1.0 sone max fans with 35 watts max draw
- Super Good Cents Manufactured Housing Program
- 1.0 sone max fans delivering 50 or 70 cfm

## Questions?Don  Stevens

- Stevens and Associates
- PO Box 398
- Keyport, WA  98345
- 360-697-5414
- don.t.stevens@charter.net

## VENTILATION TRAINING

**HRAI Residential Ventilation 2-Day Training Program Content**
**The Basics: IAQ, House as a System, Moisture Control, Ventilation Systems Types, Codes and Standards**
**Good Ventilation Installation and Design Practices**
**Duct Sizing Design Guide and Worksheets**
**System Start-up**
**Air-Flow Testing**
**Depressurization Testing**
**Service and Maintenance**
**Contact: Joanne Spurrell 1-800-267-2231      jspurrell@hrai.ca**