Energy Policy Act 2005: Residential Tax Credits

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RESNETNEW REQUIREMENTSJanuary 1, 2007
RESNET STANDARD 2004 03 BLOWER DOOR TEST
PROCEDURES
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This Presentation Jointly Prepared by
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New Requirements

• Starting Jan 1, 2007, HERS Providers are required
  to perform an annual field calibration check on
  Blower Door pressure testing instruments and
  fans.
• Providers must use standards and procedures
  recommended by the equipment manufacturer.
• Providers must maintain a written log of the
  annual calibration check for a period of 3 years.
• Similar requirements for all associated pressure
  testing instruments.

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Appendix A Building Element Air Leakage
Use the testing protocol described in ASHRAE
Standard 119 Section 5.1. Blower door and
associated pressure testing instruments, which
include but are not limited to hoses, and
Manometers, gauges, and fans shall be FIELD
TESTED annually for calibration by the HERS
provider or rater. The provider shall use a
standard for field testing of calibration
provided by the equipment manufacturer.
Magnehelic Gauges cannot be field tested and
shall be recalibrated by the Blower Door
manufacturer annually. Field check the fan and
flow measuring systems for defects and maintain
them according to manufacturers recommendations.
The HERS provider shall maintain a written log of
the annual calibration check to verify all
equipment accuracy for a period of three (3)
years. These records shall be made available
within 24 hours to a RESNET Quality Assurance
Committee member upon request. It is recommended
all pressure equipment be field checked for
calibration more frequently than is required in
these standards, i.e., monthly, quarterly, etc.
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Rated Feature Task
On-Site Inspection Protocol
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Just having a perfect gaugeby no means
ensuresreadings will be accurate
Colin Genge, Retrotec
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Field TestingMay NOTRequire Calibration
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Common Reasons forInaccurate Readings

• Using inappropriate flow ring on fan. (newer
  gauges help eliminate this mistake).
• Tubing leaking, kinked or plugged up.
• Tubing hooked up improperly.
• Damaged fans (e.g. broken flow sensor, housing).
• Gauges out of calibration.Note If both channels
  have an identical error, the effect on the the
  result is significantly reduced.
• Incorrect test procedures.

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The Energy Conservatory (TEC) Recommended
Calibration Check Procedures
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TEC Recommended Calibration Check Procedures

• Digital Pressure Gauges
• (choose either method)
• Perform the digital gauge field calibration check
  procedure found at www.energyconservatory.com
  /support/support7.htm
• or
• Recalibrate gauge at TEC factory - 50.

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Digital Gauge Field Calibration Check

• Field check procedure consists of comparing
  digital gauges against a DG-700 gauge that is
  being used as an in-house pressure standard.
• This procedure involves comparing pressure
  readings from the DG-700 Standard gauge with the
  gauge being tested (DG-700 or DG-3) at a number
  of different pressures.

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Digital Gauge Field Calibration Check

• Readings are recorded and the difference between
  the readings is determined.
• If the difference is smaller than the maximum
  allowed, gauge passes the field calibration
  check.
• If difference is larger than the maximum allowed,
  gauge should be sent to TEC for calibration.

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Digital Gauge Field Calibration Check

• Ideally, the DG-700 Standard should be
  recalibrated once every 6 months and only used as
  a pressure standard (not used in field).
• Otherwise, using a DG-700 that has just been
  returned from TEC calibration is acceptable.
• Pressures are created by syringe for field check
  (TEC has them available). Syringe is placed on
  table and pressures are allowed to stabilize
  before readings are made.
• Magnehelic gauge is used only to prevent
  over-pressurization.

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TEC Factory Digital Gauge Calibration

• Gauge is tested against a NIST traceable pressure
  standard at 20 different pressure values.
• Gauge is recalibrated and tested again.
• Calibration certificate is provided.
• 50 cost includes ground UPS shipping back to
  customer.
• Turn around time at TEC is typically 3-4 days
  (assuming no repairs needed).

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TEC Factory Digital Gauge Calibration

• Digital gauge calibration certificate looks like
  this.

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TEC Recommended Calibration Check Procedures

• Blower Door and Duct Blaster Fans
• (choose either method)
• Perform the fan field check procedure found at
  www.energyconservatory.com/support/support7.htm
• or
• Recalibrate fan at TEC factory - 200.

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Fan Field Check Procedure

• The 2 most important aspects to maintaining
  proper fan calibration (Blower Door and Duct
  Blaster)
• No leaks in flow sensor.
• Sensor in proper position.
• Damaged fan housing (e.g. broken flange) and
  broken/ missing blades can also effect
  calibration and should be repaired.

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Fan Field Check Procedure

• Simple procedures and forms for checking flow
  sensor position and flow sensor integrity are
  contained in the fan field check document.
• If fan meets specifications listed in the
  procedure, the fan passes the field check.
• If fan does not meet specifications, contact TEC
  for adjustment/repair instructions.

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TECFactory Fan Calibration

• Fan is calibrated using ASTM Standard E1258 with
  a test chamber constructed according to ASHRAE
  51/AMCA 210.
• Calibration certificate is provided including
  custom calibration parameters.
• 200 cost (shipping is extra).
• Turn around time at TEC is typically 4-5 days
  (assuming no repairs needed).

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TECFactory Fan Calibration

• Fan calibration certificate looks like this.
• Custom fan calibration parameters can be input
  into TEC software (TECTITE or TECBLAST) for
  greater test accuracy.

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TEC Recommended Calibration Check Procedures

• Duct Blaster System Field Check
• (meets requirements for both the Fan and Gauge)
• Perform the Duct Blaster System field check
  procedure using an approved orifice plate.
• This procedure will be available on the TEC
  website in the Spring 07. Approved orifice plates
  will also be available at that time.

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Duct Blaster System Field Check Procedure

• Approved orifice plate is attached to the end of
  the square transition piece.
• Air is drawn through orifice plate and into the
  flex duct.
• Fan is adjusted to specified test pressure.
• Measured flow (or hole size) from digital gauge
  is compared to standard listed in the procedure.
• Pass/fail criteria listed in the procedure.

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TEC Recommended Calibration Check Procedures

• Magnehelic Gauges
• TEC will perform an accuracy check on Magnehelic
  gauges for 15 per gauge (at the TEC factory).
• The accuracy of the gauges will be tested and
  recorded, however, calibration adjustments on
  Magnehelic gauges will no longer be performed.

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TEC Recommended Calibration Check Procedures

• Check Tubing for Leaks or Obstructions
• Tubing should be periodically checked for leaks
  and obstructions.
• Periodically trim off ¼ off the ends of tubing
  to remove damaged ends.
• If tubing leaks or is obstructed, replace it
  immediately.

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RETROTEC Recommended Calibration Check
Procedures
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Retrotec Duc-Tester Calibration Verification
Procedure
This procedure should be used whenever a new
Duc-Tester is received to verify both the system
and the operator. The Verification Plate, which
has a leakage rate of 100 cfm at 25 Pa, is
attached to the Duc-Tester to simulate a duct
system. Readings between 96 and 108 cfm indicate
no significant problems with the test method or
the equipment. If readings fall outside this
range, use the Duc-Tester Problem/Solution
Checklist to fix the problem.   Repeating this 5
minute test every month or after 20 tests will
detect problems early. No further calibration of
the system is required unless the Duc-Tester
fails this Verification.
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Problems causing inaccurate readings in order of
frequency are
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Retrotec Duc-Tester Calibration Verification
Procedure               Measure the flow rate
at 25 Pa.       Flow readings outside of 97 to
106 CFM indicate a problem.
Tape on the Plate (calibrated for 100 cfm at 25
Pa).
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Detailed Retrotec Duc-Tester Calibration
Verification Procedure
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Depressurization is the same as Pressurization
except

• Turn on the DM-2. Actuate the MODE key until
  Flow _at_ 25 Pa appears. Actuate the _at_key
  until Flow _at_ 25 Pa appears. If units are not
  cfm _at_ 25 Pa, adjust using the SETUP key.
• Place the Duc-Tester on the floor with flex-duct
  attached to the outlet side of the fan such that
  the duct is pressurized.
• Tape the Retrotec Duc-Tester Calibration
  Verification Plate to the flex duct.
• Connect the long red tube to the Verification
  Plate. Connect the other end to the Blue port on
  the Retrotec DM-2
• Connect a yellow tube between the FAN connection
  on the Duc-Tester and the yellow port on the
  DM-2.
• Connect a green tube between one port on the FAN
  and the green connector on the DM-2.
• Connect speed control and power cords to the FAN.
• Adjust the speed until PrA reads close to 25 Pa.
  Allow the flex duct to straighten out to its full
  length.
• Set Time averaging to 8 seconds.
• Flow should read between 92 and 108 cfm.
• Mark results down so your system can be tracked
  with time.

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Duc-Tester Problem/Solution Checklist Use this
List if Flow is NOT between 97 and 106 cfm for
pressurization or 92 and 108 cfm for
depressurization.Note even though the accuracy
is within 3 of measured flow, this is a
calibration check to see if something is wrong.
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Hole
Water drop
Mid
Clamp

Mid
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(No Transcript)
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Water drop
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Clamp
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Hole
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Now, move the tubes to the Green and Blue ports
of the DM-2. Compare Channel A B at maximum
pressure and 50 Pa.
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The above Solutions will fix most problems. If
your Duc-Tester still fails the Verification
Test, request an exchange or loaner from your
distributor while yours is sent back to the
factory.
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Retrotec Blower-Door Calibration Verification
Procedure   Blower Doors can be tested in a
similar fashion using larger calibration plates
like the one shown.   Measure
the background leakage. Measure the increased
leakage with the hole open. The Blower Door
should be able to measure the difference within
15 otherwise something may be wrong. Follow a
procedure similar to the one outlined in the
Duc-Tester Problem/Solution Checklist
Install your Aluminum frame in a small, tight
room with the vents and exhaust fans taped shut.
Install this panel in the upper hole.
Alternatively, cut a piece of cardboard with a
one foot by 3 foot hole in it, centered in above
the fan.
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HERS Provider ShallMaintain a WrittenLog of
Annual Calibration. . . . . . and Shall Be
MadeAvailable Within 24 Hours
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GWS Manometer Calibration Checklist
EXAMPLE
You can make your own
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QUESTIONS ?