ASI's DuctWork Leakage Leaks Pressure Testing
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Also see Air Conditioning above
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Leaking duct work often accounts for 10 to 30 percent of total heating and cooling costs.
If duct leakage is 20% of total airflow, the efficiency of the cooling system can drop as much as 50%.Duct leakage also lowers heating and cooling capacity thereby reducing equipment life. And while the increase in energy costs as a result of leaky ducts can be significant, protecting the health and safety of the building occupant is the most important reason to insist on a tight duct construction.
Air leaking into or out of the HVAC system can dramatically affect humidity control, condensation potential, indoor air quality, energy consumption, and occupant comfort.
Air leaks on the return side of the HVAC system can cause the home to become pressurized because more air is being supplied to the home than is being removed by the return air ducts. Pressurization can lead to dust filtration and wasted energy costs. The HVAC system is the primary source of dehumidification during warm weather. Leaks in ductwork on the return air side of the unit that are outside the thermal envelope can pull hot, humid air from the attic into the HVAC system. This can cause a burden on the system’s ability to dehumidify and cool the air in the home.
Air leaks on the supply side of the HVAC system can cause the home to become depressurized because less air is being supplied to the home than is being removed by the return air ducts (see diagram). Depressurization can pull dust, pollen, mold spores, carbon monoxide from cars, and other contaminants into the home through any air leaks in the building envelope. Depressurization can also pull air down through chimney flues and vent pipes of combustible appliances at a rate that can cause the pilot flame to be extinguished. If this occurs, natural gas or combustion byproducts can be pulled into the home. The depressurization caused by supply air duct leakage pumps conditioned air out of the system causing significant loss of energy.
Airtight duct construction is one of the keys to providing a quality heating and cooling system. Such systems assist in making the home’s environment more healthy and comfortable and lead to greater energy efficiency.
There is only one way to make sure that duct work has been thoroughly sealed... TEST IT. A simple pressure test can measure the air tightness of the air distribution system and helps hold installers to a high standard of quality.
Pressure testing is not a new concept in home construction. Plumbers have their work pressure tested on every job, and the test forces them to get it right, meaning NO leaks. But when plumbing leaks there is an immediate consequence... things get wet. Air leakage on the other hand seldom causes immediate trouble. Instead, homeowners gradually become aware of comfort problems, high utility bills and decreasing indoor air quality over time. A duct tightness test is the only way to identify defects in advance.
| ASI's HVAC and Home Improvement Articles Your money is literally flowing right out of your roof and crawl space! I can easily say that everyone has this problem, if you have an attic space and we all do, then you are wasting countless dollars every minute of every day. Easy Do It Yourself Energy Savings! Great Energy Savings from Hybrid or Dual Fuel Systems With the threat of energy prices increasing every year the idea of high efficiency and energy savings becomes more and more real to residents of the hydroelectric charged northwest. One approach that is very popular today is called a “dual fuel” heating system. First let’s define what a dual fuel system... The Geo-Thermal System Explained in a Nut Shell Geothermal is by far the highest efficiency heating and cooling system available today. While the systems require up to three times more investment upfront than a conventional heating and cooling system... Ameri-Serv, Inc. Heating and Cooling News Ameri-Serv Inc Helping the Treasure Valley Community Ameri-Serv, Inc. Heating and Cooling has successfully helped dozens of Treasure Valley Families with thousands of dollars worth of free maintenance services and repairs through this holiday... |
 
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ASI's Cooling Related Articles
  What
should I Look for Before I call for services on my air conditioning
system? The number one issue we find on air conditioning systems is
clogged filters. First look to see if your air filter is clean and not
clogged up, if it is clogged change the air filter and try your system
again but keep in mind with the air conditioning system running with a
clogged air filter you could have also iced up your indoor coil due to
low air flow.
|
  Why
does my Air Conditioning run all day in hot weather? Assuming this is
not a new symptom... this is a common complaint and can be attributed to
two possible things. The first is that your system may have been
designed correctly to meet the latest energy codes to perform at the
highest efficiency. The other possibility is that it was not designed at
all or was not sized properly in the first place. |
  Things you can do to maintain your air conditioning system. You can keep the outdoor air conditioner clean. You can
vacuum out the inside of the unit and get all those leaves and stuff
out. On most units you can gain access through the service panel. Be
sure the power is off before opening the panel. Be careful not to knock
off any wires and do not hit the coil as you will cause permanent
damage.
|
  In
the case of the thermostat calling for cooling the thermostat switches
on the power from the “R” or in some cases the “RC” terminal which is
the 24 volt power source to the “Y” terminal on the thermostat which is
in essence the call for cooling. These terminals are located on the back
or on the wall mounted face plate of the thermostat. All the wires
connected to the thermostat will usually always go directly to the
furnace and another set of wires will then go out to the outdoor air... |
Breaking News: The Cost to Repair your old Air Conditioner just Skyrocketed
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Copyright 2011. ASI Heating and Cooling a Division of Ameri-Serv, Inc. All rights reserved
13601 W McMillan Rd Suite 102-120 Boise, Idaho 83713 Office (208) 342-4328 Fax (208) 906-1282
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Copyright 2011. ASI Heating and Cooling a Division of Ameri-Serv, Inc. All rights reserved