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 2

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. 3

Data Collection Information for Assessment Inventory existing fans (measure flow with fan flow 1) meter) Local a) Bathrooms (50 CFM required)  Kitchen (100 CFM required)  Note if these rooms have a fan and/or  operable window. Calculate the CFM needed; use whichever is b) larger. (# bedrooms+1) x 7.5 CFM= OR  # people X 7.5 CFM=  Obtain Initial Blower Door Reading c) Estimate Final-blower door reading, using MRV d) % reduction from BDDS. 4

Data Collection Information for Assessment Use the Minimum Ventilation Rate (MVR)to 1) determine if an ASHRAE fan is likely to be needed upon on c com ompletion on . Fans should allow for adjustment if needed, it is 2) not recommended to install non-adjustable fans. The FINAL Blower Door determines what the 3) final ASHRAE exhaust fan setting should be not the MVR. Agencies should not withhold measures in order to 4) avoid complying with ASHRAE 62.2-2013 5

Blower Door Data Sheet (BDDS) Changes for ASHRAE 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) 6

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 7

Blower Door Data Sheet (BDDS) Remember to take an inventory of existing exhaust fans with fan flow readings and existing windows 8

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 9

Enter Data into ASHRAE Calculator  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 10

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. 11

Enter Data into ASHRAE Calculator 12

RedCalc examples 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 13

Now what do I do? 14

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 15

ASHRAE 62.2-2013 New Addendum  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. 16

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 17

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 18

Additional Selected Requirements of Standard 62.2 19

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 20

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. 21

Ventilation Operation Manual  Customer education is very important.  Make up an operation manual for occupants. Have extra copies available.  Purpose of ventilation.  Proper operation of ventilation system, whole building and local.  Maintenance suggestions. 22

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) 23

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 24

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. Duct Flex Duct Smooth Duct Type 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” & NL NL NL NL NL NL NL NL above 25

Whole-Building Ventilation Equipment Options 26

Bathroom or Hall Exhaust Fans 27

*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 28

Programmable Control A control for whole building intermittent fans  Air Flow adjustable from 40 to  Airetrack™ by Tamarack 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. 29

Programmable Control A control for whole building intermittent fans  Air Flow adjustable from 40 to  Digital Bath Fan 100% of capacity in 16 Control™ by Honeywell 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. 30

Measuring Ventilation Performance 31

Exhaust Fan Flow Meter  Measurement range from 10 to 124 CFM 32

Exhaust Fan Flow Meter USE 33

Measuring Directly with a Manometer (DG-700) 34

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 35

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 36