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About HVAC BALANCE - Call (800) 217-8437.
HVAC BALANCE 5-Step service process:
Call us at (800) 217-8437 for a FREE consultation with a Certified Air Balance Consultant who will review your requirements and recommend next steps. HVAC BALANCE Frequently Asked Questions (FAQ) - Call (800) 217-8437.Example Balance Procedure: Select thermostats to simulate, as nearly as practical, the manner in which the system will respond to the building's cooing load shift. We check to verify that all start up is complete. We test and record leaving air temperatures - W.B. cooling coil. In the last few years a new balancing task has presented itself. A large demand for HVAC commissioning has came about. This would involve the balancing group in the project much earlier than before. We would be working with the engineers in the designing of the system and with all other trades involved with the installing and start up of all equipment. Gravity dampers or an exhaust fan can be used to control building pressure. An engineer can subtract the amount of exhausts (such as toilet exhausts) from the minimum-outside-air quantity and estimate the extent to which the remaining outside air could pressurize the building. During commissioning, pressurization set points can be determined by taking building-pressure field measurements with known outside-air quantities. One drawback is that the method does not truly control minimum outside air. The method uses a surrogate, such as the supply-fan capacity signal, as an approximation of total supply airflow. The controls use the surrogate signal to open the outside-air damper further as the supply fan slows, maintaining a nearly constant minimum outside airflow rather than a constant percentage of supply airflow. Zone requirements are direct indications of system load conditions and they are also used for supply air temperature reset. normally, the supply air temperature set point is set at the highest value that will keep the zone requiring the most cooling at its set points and zone humidity within acceptable limits. The drawback of this reset scheme is that it can potentially have one or two hot spots dictating the supply air temperature set point. This scheme can be seen as one variation of return air temperature based reset. Although model codes have included duct-sealing requirements for years, enforcement has been spotty or nonexistent. For example, a 2001 study of 80 new homes in Fort Collins, Colorado, found that the number of homes that complied with code duct-tightness requirements was zero. Astonishingly, the average duct leakage in the studied homes was 75% of total system airflow. Another 2001 study found that Massachusetts Energy Code requirements for duct sealing were widely ignored. Researchers who inspected 186 new Massachusetts homes reported that serious problems were found in the quality of duct sealing in about 80% of these houses. The 2006 International Residential Code (IRC) requires (in section N1103.2.2) that Ducts, air handlers, filter boxes and building cavities used as ducts shall be sealed. Elsewhere, in section M1601.3.1, the IRC requires that Joints of duct systems shall be made substantially airtight by means of tapes, mastics, gasketing or other approved closure systems. Hardware-store duct tape is not an approved tape. Kitchen Hood Grease Duct Leakage Testing is performed as a service to provide proof that the grease duct systems installed on a kitchen hood system has no leaks. We use only professional calibrated equipment to perform these tests to ensure the validity of these tests. Energy Technologies offers a wide range of consulting services. Tap into our resources in the energy and environmental field, we can show you how to be energy wise and environmentally sound while saving money all at the same time! A building that only meets energy code requirements will often have a different HVAC system than one that uses 40% less energy than the code. And the difference is likely to be not only component size, but also basic system type. |
