{"id":2712,"date":"2014-05-01T20:19:01","date_gmt":"2014-05-01T20:19:01","guid":{"rendered":"http:\/\/www.airxchange.com\/?p=2712"},"modified":"2019-10-22T20:28:02","modified_gmt":"2019-10-22T20:28:02","slug":"for-and-from-hvac-system","status":"publish","type":"post","link":"https:\/\/www.airxchange.com\/2014\/05\/for-and-from-hvac-system\/","title":{"rendered":"For and from HVAC System"},"content":{"rendered":"

For and from HVAC Systems
\n<\/strong>
\nEnergy Exchange between Exhaust and Fresh Air<\/em><\/p>\n

Buildings account for 35 to 40 percent of total energy consumption worldwide, according to the
\nDepartment of Energy. Commercial buildings, in particular consume large amounts of energy related to heating\/ventilation\/air
\nconditioning (HVAC), lighting, water heating, and other building systems.<\/p>\n

Efforts to reduce energy consumption and greenhouse gas emissions have led to increasing deployments
\nof energy efficiency retrofits for commercial and public buildings. According to a new report from
\nNavigant Research, the worldwide market for energy efficiency retrofits in commercial and public
\nbuildings will grow from $68.2 billion in 2014 to $127.5 billion by 2023.<\/p>\n

\u201cBecause the existing building stock dwarfs the amount of new building space being added on an annual
\nbasis, energy efficiency retrofits are a critical pathway to greening the world\u2019s commercial buildings,\u201d
\nsays Eric Bloom, principal research analyst with Navigant Research.<\/p>\n

\u201cThere\u2019s a big opportunity for improving energy efficiency in existing buildings\u2019 HVAC systems,\u201d said
\nRandy Steele, VP and general manger of Airxchange\u00ae, a manufacturer of a line of energy recovery wheels
\ndesigned for field installation.<\/p>\n

Energy Recovery Ventilation is the energy recovery process by which energy contained in stale exhaust
\nair is used to pre-condition fresh air supplies in HVAC systems. Steele said, energy recovery wheel technology
\nreduces energy requirements for heating or cooling outdoor air by up to 80 percent and is available from most HVAC manufacturers in a variety of
\nconfigurations. A recent study conducted for the U.S. Department of Energy estimates that wide spread use of Energy
\nrecovery Ventilation can save up to .55 quads of energy annually by recycling energy otherwise wasted in
\nbuilding exhaust air.<\/p>\n

An ERV is a type of air-to-air heat exchanger that not only transfers sensible heat but also latent heat.
\nERVs are especially recommended in climates where cooling loads place strong demands on HVAC
\nsystems. They transfer moisture from the humid air stream (incoming out-door air in the summer) to the
\nexhaust air stream. In some cases, ERVs may be suitable in climates with very cold winters. If indoor
\nrelative humidity tends to be too low, what available moisture there is in the indoor exhaust air stream is
\ntransferred to incoming outdoor air.<\/p>\n

By recycling 70 to 80 percent of the total energy contained in the exhaust air, energy recovery wheels
\nlower total HVAC energy usage.<\/p>\n

Energy recovery wheels offer a highly efficient alternative to condition the out-door air as compared to a
\ntypical vapor compression system. Combining the two technologies can increase your total system
\nefficiency, said Steele. \u201cExisting technologies have reached their maximum efficiencies,\u201d adding that the
\ntechnologies are now being combined to increase efficiencies.<\/p>\n

Shifting the outdoor air ventilation load to the wheel reduces the demand on traditional HVAC
\nequipment, allowing the now smaller, wheel-based HVAC equipment to operate more efficiently.
\nEnergy Recovery Ventilators are an integral part of modern commercial HVAC systems, allowing for low
\nenergy costs while not compromising the desire for a comfortable environment.<\/p>\n

As part of its \u201cIAQ Design Tools for Schools\u201d program, the EPA says indoor air can be 2 to 5 times more
\npolluted than out-door air; therefore, most HVAC system designers understand that increased amounts of
\noutdoor air supply is generally better for IAQ. Yet there are concerns over the implications that this added
\namount of outdoor air supply has on the operating cost of the HVAC system, as well as moisture control
\nfor the building (too wet or too dry).<\/p>\n

As a result, school designers often try to reduce the amount of outdoor air equal to \u2013 or even below \u2013 15
\ncubic feet per minute (cfm) of outside air per person, the minimum for school classrooms, as established
\nby the American Heating, Refrigerating and Air-conditioning Engineers (ASHRAE).<\/p>\n

Energy costs, and moisture control do not have to be at odds with good IAQ. Energy recovery ventilation equipment
\ncan make the negative implications of 15 cfm, while retaining the IAQ advantage of 15 cfm. This approach has
\nbeen proven in many schools in various regions east of the Rockies, where advanced HVAC systems cost roughly
\nthe same as conventional systems, yet provide significant operating cost savings and IAQ advantages.
\nThe incorporation of ERV reduces the peak heating and cooling loads that must be met by the HVAC equipment, and
\nthis allows some capital cost reduction due to HVAC equipment downsizing. In some equipment configurations, the
\ninstallation of an ERV system can also eliminate the need for a building exhaust fan, which will also provide capital cost savings.
\nERV systems can also provide annual energy savings by reducing the amount of HVAC energy that is
\nneeded to condition the outdoor ventilation air, however, there are inefficiencies and pressure losses
\nassociated with ERV systems that reduce the overall operating savings. In some cases ERV systems may
\nrequire additional maintenance beyond that required for the baseline HVAC system.
\nWhen the time comes to replace or install energy recovery wheels in commercial HVAC units, facility
\nmangers, building owners and engineers face installation challenges including limited access areas, bulky
\ncomponents and complex assemblies.<\/p>\n

To eliminate these barriers and facilitate a successful, hassle-free installation, Airxchange\u00ae designed its
\nline of energy recovery wheels specifically for field installation. Field assembled kits are easily handled
\nby two people and fit through all standard doorways and stairwells. The convenient, transportable design
\navoids the need for special access openings and eliminates excess material handling and installation costs.
\nAirxchange\u00ae provides same-day assembly, installation and testing of each energy recovery wheel.
\n\u201cMany times the original equipment manufacturer is no longer in business which presents an extra hoop
\nfor facility mangers to jump through,\u201d said Steel.<\/p>\n

Meanwhile, advancing ERV technology bridges the gap between healthy indoor environments and energy
\nconsumption.<\/p>\n","protected":false},"excerpt":{"rendered":"

For and from HVAC Systems Energy Exchange between Exhaust and\u2026<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[20],"tags":[],"acf":[],"yoast_head":"\nNews | Blog | Energy Recovery | Airxchange<\/title>\n<meta name=\"description\" content=\"For and from HVAC System\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.airxchange.com\/2014\/05\/for-and-from-hvac-system\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"For and from HVAC System\" \/>\n<meta property=\"og:description\" content=\"For and from HVAC System\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.airxchange.com\/2014\/05\/for-and-from-hvac-system\/\" \/>\n<meta property=\"og:site_name\" content=\"Airxchange\u00ae\" \/>\n<meta property=\"article:published_time\" content=\"2014-05-01T20:19:01+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2019-10-22T20:28:02+00:00\" \/>\n<meta name=\"author\" content=\"user@clearhead\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:creator\" content=\"@airxchange\" \/>\n<meta name=\"twitter:site\" content=\"@airxchange\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"user@clearhead\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.airxchange.com\/2014\/05\/for-and-from-hvac-system\/\",\"url\":\"https:\/\/www.airxchange.com\/2014\/05\/for-and-from-hvac-system\/\",\"name\":\"News | Blog | Energy Recovery | Airxchange\",\"isPartOf\":{\"@id\":\"https:\/\/www.airxchange.com\/#website\"},\"datePublished\":\"2014-05-01T20:19:01+00:00\",\"dateModified\":\"2019-10-22T20:28:02+00:00\",\"author\":{\"@id\":\"https:\/\/www.airxchange.com\/#\/schema\/person\/73a057d8519a22436e93ded3008f55d6\"},\"description\":\"For and from HVAC System\",\"breadcrumb\":{\"@id\":\"https:\/\/www.airxchange.com\/2014\/05\/for-and-from-hvac-system\/#breadcrumb\"},\"inLanguage\":\"en-US\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/www.airxchange.com\/2014\/05\/for-and-from-hvac-system\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/www.airxchange.com\/2014\/05\/for-and-from-hvac-system\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\/\/www.airxchange.com\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"For and from HVAC System\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/www.airxchange.com\/#website\",\"url\":\"https:\/\/www.airxchange.com\/\",\"name\":\"Airxchange\",\"description\":\"Energy Recovery Ventilator Equipment, Energy Recovery Wheels - 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