energy audits by synergy
TRANSCRIPT
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7 Steps of Building a Synergy Home(click on the screen to watch our video)
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The Importance of Energy Audits Powerpoint Presentation
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There are essentially 7 Steps to Achieving a “Synergy Home”
• Airtight Construction• Fresh Air Ventilation• Improved Thermal Systems• Properly Sized, Designed, Installed, and
Commissioned HVAC System• Pressure Balanced• Moisture Managed• Combustion Safety
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An energy audit is a comprehensive examination of
your home and its systems using diagnostic tools and equipment.
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Why an energy audit?• High utility bills.• Identifying and correcting unresolved issues.• It helps to determine if energy efficient upgrades are
needed and the return on investment of those upgrades.
• Comfort issues such as rooms that are too hot, too cold, or too drafty.
• Indoor air quality issues.• Moisture issues in your home or crawlspace.• Durability issues.• General knowledge of your home and its systems.• Commissioning / Synergizing a new home and its
systems.
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Don’t assume your brand new home is performing properly just
because it is new and built to code. Building codes require bare
minimums and do not address the system as a whole.
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We oftentimes test new homes and find fatal flaws that can easily be
corrected that would have otherwise go undetected.
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Home inspections• Are a prerequisite for buying a home.• Are not energy audits• Are rarely performed using complex diagnostic tools.• Typically involve only visual inspections and visual inspections rarely
confirm that the HVAC system is operating properly.• Many times issues in hard to inspect areas such as the crawlspace are
simply ignored.• Are performed by inspectors that are recommended by the real estate
agent. Conflict of interests can happen.• Home inspectors generate much of their work from referrals and referrals
are generated by making sales easier to close.• Deserve a 2nd opinion.• Buyers expect the costs to repair items that are found to be deducted
from the sales price.• Home inspection companies are not liable for anything in excess of their
home-inspection fee.
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Why you should use Synergy Home Performance LLC as your auditor
• We have 4 Building Performance Institute Certified (BPI) Auditors on staff and we have performed over 2000 energy audits.
• We have a HERS rater on staff.• Our energy audits are very detailed and generally take 3 to 6
hours.• We have a State of Alabama HVAC license. • We have a State of Alabama Homebuilders license.• We offer energy audits, spray foam installation, air sealing
packages, traditional insulation, closed crawlspace construction installation, HVAC Design Services, and energy efficient building consulting.
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We prefer that you follow us around during your audit and ask plenty of questions. We want you to have a good understanding of
your home and its systems because more than likely, its the biggest investment you will ever
make.
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Within a few days, we provide you with a detailed Energy
Performance Score (EPS) report prioritizing the issues we find in
your home. Pictures are included.
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The tools of an energy auditor• Extensive knowledge, training, and experience.• Building Performance Institute Certified.• Blower door.• Infrared camera.• Manometer.• Flow hood or hot wire anemometer.• Thermometer.• Moisture meter.• Duct blaster.• Carbon monoxide detectors.• Graph paper and tape measure.• Digital camera.
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We start the audit by interviewing you and addressing any questions
or concerns.
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Next, we perform a blower door test. A blower door pulls air out of your
home and helps us identify the specific leakage areas.
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We measure and draw out your home on graph paper. We then
calculate the volume of your home and by using the cubic feet per
minute of air leakage we are able to calculate the air changes per
hour.
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Many auditors, in an effort to save time, and due to their inability to locate the thermal barrier, only
report the air leakage in cubic feet per minute. Leakage of 1000 cfm in a 2000 sf home with 8ft ceilings is much different than a 10,000 sf home with 10 ft ceilings and the
same amount of leakage in cfm’s.
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Notice the sheetrock dust pulled in under the sill plates on this spray foamed, slab home when blower
door testing was performed.
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Without testing and with only a visual inspection, how do you locate air leakage sites? Our energy auditing helps us to
eliminate air leakage sites in new construction.
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Common air leakage sites• Attic pull-down stairs and attic access doors
located inside of the conditioned space.• Recessed cans and exhaust fans.• Framing shafts.• Fireplaces.• HVAC systems.• Sill plates.• Windows and doors.• Interior door latches.
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The infrared camera is used in conjunction with the blower door to
help locate air leaks, un-insulated areas, and moisture issues hidden in
the walls, attic, crawlspace, basement, and slab foundations.
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We also use the manometer in conjunction with the blower door
to determine the connectivity between the house and the attic
and the house and the crawlspace.
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We visually inspect your crawlspace and attic. How many other energy auditing companies
provide this service?
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We use a manometer to confirm that there is a 3 Pascal or less pressure differential
between a bedroom and the main body of the home when bedroom doors are closed.
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Providing proper return airflow is one of the best and least expensive ways to improve a home’s comfort and
performance. Returns should never be located in closets even with a louvered door. Use the most
inexpensive, non-restrictive filters possible!
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Installing returns, jumper ducts, or transfer grilles in all bedrooms so that the air has a
return path if the doors are closed is mandatory. See Step 5 – Pressure Balancing for more info!
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We use the flow hood to measure bathroom fan exhausts. We often get readings of “0” although the
fan appears to be working correctly. Improper exhaust fan operation allows high interior moisture levels and
indoor air quality issues.
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We are yet to test a home without at least one bathroom exhaust fan
improperly installed.
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This exhaust duct was completely disconnected. Without testing, how
would you know?
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We visually inspect to make sure clothes dryer and kitchen exhausts
are working and exhausting properly.
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For every cubic foot of air that exits a home through exhaust fans,
chimneys, and air leaks, a cubic foot of air must be pulled in to replace
it. Typically, it enters from the nearest, biggest hole and it brings contaminants with it. We are able to locate the holes and seal them.
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We are then able to provide you with cost-effective fresh air
ventilation strategies.
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We also use the manometer to static pressure test HVAC systems
on all of our energy audits. The static pressure of your HVAC
system is the equivalent to your blood pressure.
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High static pressure is the equivalent of high blood pressure
and it indicates low airflow.
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71.8 + 234 = 305.8 / 250 = 1.22 IWC.
1.22 IWC should be 0.5 IWC This unit is having a stroke!
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Smart systems display the static pressure on the thermostat as well
as the cubic feet per minute of airflow.
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We double check the return side airflow with a flowhood or hotwire
anemometer.
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We compare the actual airflow to the rated airflow of the HVAC
system.
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A typical HVAC system requires approximately 400 cubic feet per
minute of airflow per 1 ton of heating and cooling. For example,
5 tons of heating and cooling requires approximately 5 tons x
400 cfm = 2000 cfm.
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In units with high static pressure, the rated 2000 cfm of airflow is
often found to be 1000 - 1200 cfm.Where is the other air?
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We actually started out offering airflow diagnostics and air balancing but most
times the total system airflow was in need of correction. Keep in mind that proper airflow is required before refrigerant can
be added.
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In the earlier picture of the “smart” thermostat, notice that the delivered cfm was 1957cfm.
Smart systems attempt to overcome high static pressure but
the watt draw is excessive and eventually the motor will burn out.
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Note that when the work of the HVAC fan motor is decreased, the amp draw is reduced by a factor of
3. Similarly, when the work is increased, the watt draw is increased by a factor of 3.
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We open up your HVAC unit and inspect it thoroughly.
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We check your speed taps or dip switches to make sure they are
properly set.
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Energy efficiency programs are paying for duct blaster testing and duct sealing while failing to require static pressure testing and airflow
confirmation.
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Many high static systems with extremely low airflow pass duct blaster tests with flying colors.
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Duct sealing properly sized and designed HVAC systems provide
energy savings.
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Duct sealing improperly sized, designed, and installed HVAC
systems cause increased static pressure which leads to low airflow, comfort issues, and
premature compressor and fan motor failure.
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We offer duct-blaster testing but we do not believe it provides much useful information. However, it is required
by the 2009 IRC unless ducts are installed in the conditioned space.
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We use Right-Suite Universal to size and design Heating, Ventilation, and
Air Conditioning systems.
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See “The HVAC Design Customer
Questionnaire” and our full size HVAC Design example.
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Temperature Diagnostics
We measure temperature drops across the “system” along with airflow to determine “system
efficiency”.
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Measuring temperature drops across the equipment doesn’t tell
us much, especially if the airflow is low and the ducts are located in
unconditioned spaces.
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It is all about “system efficiency” and delivered Btu’s. “Equipment
efficiency” measured in a laboratory under ideal conditions is unrealistic to field conditions.
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So why is low airflow bad?
• Comfort requires proper airflow in order to supply and return the right amount of air at the right temperature to the right room.
• Premature compressor failure – frozen coils often result from low airflow.
• Premature motor failure.• Cracked heat exchangers – Carbon Monoxide
poisoning.
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Don’t waste your time on an energy audit that doesn’t measure
airflow and static pressure.
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The problem with “free energy audits” offered by local utilities
• A clipboard and a checklist are not diagnostic tools –keep in mind “We Test, Others Guess”.
• How can you recommend air sealing when you don’t know exactly where the leaks are?
• Attic insulation is oftentimes recommended without first air-sealing.
• Traditional floor insulation is often recommended though it has been proven that it rarely works.
• Changing out light bulbs is obvious.• You are actually paying for other’s “free” audits on your
utility bill.
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Notice the worthless electrical outlet covers that TVA sends out to
people.
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Local utility companies don’t have incentives to reduce your energy
usage despite what their marketing department tells you!
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Motorized attic fans are one of the biggest problems in homes. Unless
the home is perfectly sealed, motorized attic fans pull
conditioned air out of your home while consuming energy.
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Beware of “free energy audit offers” by unscrupulous companies
attempting to sell you products such as radiant barriers or HVAC
systems.
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We offer combustion testing and carbon monoxide testing and we sell
high grade carbon monoxide monitors. Notice the CO detector purchased at a “Big box” retailer is showing “0” while
ours is showing “17”.
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We offer moisture meter measurements and we sell hygrothermometers with remote sensors that display both the
humidity and temperature in the crawlspace as well as the home.
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Call us at (256) 616-2264 for more info on energy audits. TVA rebates
are available.