ASHRAE 62.2 2013 What Does the New Ventilation Standard Mean for - - PowerPoint PPT Presentation

ASHRAE 62.2 – 2013 What Does the New Ventilation Standard Mean for Weatherization?

October 29, 2014

ASHRAE 62.2-2013

 www.ashrae.org

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ASHRAE Alternative Compliance Supplement: Appendix A of 62.2-2013

 For existing dwellings only.  Required for single-family, multifamily up to

three stories, and manufactured and modular buildings.

 Provides alternative method of meeting local

exhaust requirements in kitchens and bathrooms that do not have the existing LOCAL fan flow required by ASHRAE 62.2- 2013.

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Data Collection Information for Assessment

1)

Inventory existing fans (measure flow with fan flow meter)

a)

Local



Bathrooms (50 CFM required)



Kitchen (100 CFM required)



Note if these rooms have a fan and/or

• perable window.

b)

Calculate the CFM needed; use whichever is larger.



(# bedrooms+1) x 7.5 CFM= OR



# people X 7.5 CFM=

c)

Obtain Initial Blower Door Reading

d)

Estimate Final-blower door reading, using MRV % reduction from BDDS.

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Data Collection Information for Assessment

1)

Use the Minimum Ventilation Rate (MVR)to determine if an ASHRAE fan is likely to be needed upon

• n c

com

• mpletion
• n.

2)

Fans should allow for adjustment if needed, it is not recommended to install non-adjustable fans.

3)

The FINAL Blower Door determines what the final ASHRAE exhaust fan setting should be not the MVR.

4)

Agencies should not withhold measures in order to avoid complying with ASHRAE 62.2-2013

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Blower Door Data Sheet (BDDS) Changes for ASHRAE

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EXAMPLE 1: .35 x 12,000= 4200/60= 70 OR (3 bedrooms+1) x 7.5=30 70 x 18.5 = 1,295 (larger number is volume) EXAMPLE 2 : .35 x 12,000= 4200/60= 70 OR 10 occupants x 7.5= 75 75 x 18.5= 1,387.5 (larger number is occupancy)

Blower Door Data Sheet (BDDS) to utilize with ASHRAE determination

EXAMPLE: Initial BD reading = 4500 CFM Use 40% reduction 4500 x .40= 1,800; 4500- 1800= 2700 CFM, or Easier way to calculate is 4500 x .60= 2,700 CFM

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Blower Door Data Sheet (BDDS)

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Remember to take an inventory of existing exhaust fans with fan flow readings and existing windows

ASHRAE Calculator

 Residential Energy Dynamics (RED calc)  Free ASHRAE 62.2-2013 Calculator  Features 61 weather stations throughout

Texas

 Unlike the 2010 version there is no smart

phone or tablet application

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Enter Data into ASHRAE Calculator

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 Use existing construction and infiltration

credit

 Select weather station that is closest to where

the home is located. Even if it is in an adjacent state

Local Ventilation Requirements

 Local exhaust fans installed in bathrooms and

kitchen.

Bathrooms (not half bathrooms) 50 CFM on-demand, or 20 CFM continuous. Kitchen 100 CFM on-demand*, or 5 ACH, based on kitchen volume. 12’ x 14’ x 7.5’ kitchen requires 105 CFM. *Vented range hood required if exhaust fan flow rate is less than 5 kitchen air changes per hour.

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Enter Data into ASHRAE Calculator

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RedCalc examples

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EXAMPLE 1:

 .35 x 12,000= 4200/60= 70 OR (3 bedrooms+1) x 7.5=30  70 x 18.5 = 1,295 (larger number is volume)

EXAMPLE 2 :

 .35 x 12,000= 4200/60= 70 OR 10 occupants x 7.5= 75  75 x 18.5= 1,387.5 (larger number is occupancy)  RedCalc does these calculations for you! Count each

bedroom as a person and add one or enter the number of people which ever is greater

Now what do I do?

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Whole House Ventilation Requirement

 RedCalc will give you either continuous or

intermittent CFM requirement.

 Determine:

 If house needs additional ventilation  What size fan needs to be installed  Where the fan should be located  How long the fan needs to run

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ASHRAE 62.2-2013 New Addendum

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 Essentially this addendum states if there is

less than 15cfm needed, no exhaust fan is required to be installed.  This policy for Texas WAP will be effective as of November 1, 2014. Homes assessed prior to this date will follow previous guidance.

Data Collection Information during Final Inspection Verify home meets ASHRAE ventilation requirements calculated. Note F Fin inal Inspection.



Adjust mechanical ventilation to meet ASHRAE standard if necessary



Avoid having to add ventilation at this stage as this will delay your processes and disturb existing weatherization measures

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Data Collection Information during Final Inspection Perform combustion safety testing.



Verify proper operation of all local and whole building ventilation equipment and controls (commissioning).



Perform a Worst Case Draft test to ensure no back drafting is now occurring as a result of complying with ASHRAE 62.2-2013

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Additional Selected Requirements of Standard 62.2

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Additional considerations

 Must prevent migration of contaminates to

the adjoining conditioned space from attached garages

 All joints, seams, penetrations, and openings

must be sealed.

 Carbon monoxide detectors are now required

as part of ASHRAE 62.2-2013

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Instructions and Labeling

 Provide to owner or occupant of

dwelling unit:

Information on ventilation systems

installed;

Instructions on proper operation; and Instructions on proper maintenance.  Controls shall be labeled as to their

function.

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Ventilation Operation Manual

 Customer education is very important.  Make up an operation manual for

• ccupants. Have extra copies available.

Purpose of ventilation. Proper operation of ventilation

system, whole building and local.

Maintenance suggestions.

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Equipment Selection

 Select equipment with performance certified by

ANSI, AMCA, and HVI

 Very quiet: 1 sone or less is required for continuous

ventilation, ≤ 3 sone for intermittent

 “The sound ratings of installed ventilation

equipment shall meet the requirements of the Standard.”

 Exhaust or Supply only ventilation  Mechanically balanced ventilation with heat or

energy recovery (expensive but allowable)

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Ventilation Ducting

 If outside thermal envelope, insulate to keep

temperature differences condensing creating excess moisture.

 Rigid ductwork performs best and is

preferred.

 Support properly, no sags or dips.  Flexible duct specifications.  Dryer vents must be vented to outside

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Install it so it works

Duct lengths (ASHRAE 62.2 Table 5.3)



Maximum allowable length at different flow rates.



This table assumes no elbows. Deduct 15 feet of allowable duct length for each elbow.



NL= no limit X- not allowed. Any length of duct this size with assumed turns and fittings will exceed the rated pressure drop.

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Duct Type Flex Duct Smooth Duct Fan Rating 50 80 100 125 50 80 100 125 Diameter Maximum Length 3” X X X X 5 X X X 4” 56 4 X X 114 31 10 X 5” NL 70 35 20 NL 152 91 51 6” NL NL 158 91 NL NL NL 168 7” & above NL NL NL NL NL NL NL NL

Whole-Building Ventilation Equipment Options

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Bathroom or Hall Exhaust Fans

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*Controls

 5.3 Continuous Mechanical Exhaust. A

continuously operating mechanical exhaust system shall be installed to operate without occupant intervention.

 Intermittent Mechanical Ventilation, shall be

installed on a timer.

 5.3.1 Control and Operation. The system shall be

designed to operate during all occupiable hours. Readily accessible override control must be provided to the occupant.

* This slide has replaced previous content as provided in original webinar presentation on October 29, 2014

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Programmable Control A control for whole building intermittent fans

 Air Flow adjustable from 40 to

100% of capacity in 16 increments for background ventilation rate.

 Built-in Timer programmed at

installation in multiples of 5 minutes for a 12 or 24 hour cycle.

 Boost to full speed for 20

minutes by pressing button. Pressing again drops speed to background rate.

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 Airetrack™ by Tamarack

Programmable Control A control for whole building intermittent fans

 Air Flow adjustable from 40 to

100% of capacity in 16 increments for background ventilation rate.

 Built-in Timer programmed at

up to 60 minutes in multiples of 5 minutes

 Temporary override button to

allow for client control just when they need it.

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 Digital Bath Fan

Control™ by Honeywell

Measuring Ventilation Performance

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Exhaust Fan Flow Meter

 Measurement range from 10 to 124 CFM

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Exhaust Fan Flow Meter USE

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Measuring Directly with a Manometer (DG-700)

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Exhaust Fan Flow Meter Resources

 Demonstration Video

 http://www.youtube.com/watch?v=yNb4lwoTKok

 Exhaust Fan Flow Meter Manual

 http://www.energyconservatory.com/sites/default/files

/documents/flow_box_manual_dg-700.pdf

 Exhaust Fan Flow Meter Quick Guide

 http://www.tdhca.state.tx.us/community-

affairs/wap/guidance.htm#guides Under Weatherization Guides

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ASHRAE 62.2-2010

 The 2010 calculator on TDHCA website will

be disabled December 31, 2014

 Homes assessed prior to November 1, 2014

may utilize the 2010 ASHRAE calculator

 PY14 DOE contracts must

st comply with ASHRAE 2013 version

 PY14 DOE contracts are anticipated to be

effective November 13, 2014

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Summary

 ASHRAE 62.2-2013 effective as of

November 1, 2014 for PY14 DOE and PY 13 LIHEAP

 Use FINAL blower door for determining

CFM flow of exhaust fan

 CO Detectors are required to be installed  RedCalc will be the preferred calculator to

use

 Install adjustable fans as a best practice

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Summary

 Install timer devices, allow for client control

for continuous fan

 Smooth duct is most effective, use sizing

guidance in ASHRAE 62.2-2013

 Insulate duct if outside of thermal boundary  Vent to exterior on a dedicated duct (not to

an existing roof/gable vent

 Client education very important

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Questions?

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Contact Information

TEXAS DEPARTMENT OF HOUSING AND COMMUNITY AFFAIRS 221 E. 11th Street, Austin, TX 78701 P.O. Box 13941, Austin, TX 78711-3941 Phone: 512-475-3800 Toll Free: 800-525-0657 Web: www.tdhca.state.tx.us Email: info@tdhca.state.tx.us

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