Your air handler is an essential part of your "split" heating and cooling system. It is the indoor portion that delivers the cooled air in the summer and heated air in the winter — quietly and economically. You'll find a Daikin brand air handler that's a perfect complement to any heat pump system. No matter which unit you install, the Daikin brand offers what we believe to be some of the best warranties in the heating and cooling industry. Draw-thru centrifugal blower is belt-driven for quiet, efficient operationUpflow and horizontal installationsAHRI certified; Look into the future 2018 / 2020 A look at the minimum requirements shows that starting in 2018, very high requirements will be placed on HVAC units and their components. A more in-depth consideration shows that according to today's state of technology, the requirements of the Ecodesign Directive with respect to SFP, HCR and fan efficiency result in technically more exacting HVAC units to conform with these high efficiency standards.

The EU Commission has moreover indicated it might apply an even more rigorous Ecodesign Directive for HVAC units starting in 2020. air handling unit selection softwareThis conforms with the EU Directive 2010/31, which regulates the total energy efficiency of buildings and requires that all new buildings (public buildings from 2018) must be lowest-energy buildings by the end of 2020.central air conditioning parts store The following example should clarify the impact of the Ecodesign Directive for HVAC units. high efficiency ac unitUsed as reference is a central air-handling unit with a heat recovery of 55 % and an air velocity of 2.2 m / s in the clear unit cross-section (version 2015). Basics of LCC calculation Volume flow (ABL = ZUL)

Ecodesign Directive valid from Annuity of the energy costs Annuity of the capital costs The values from the example reflect the future trend. HVAC units will require more space in order to comply with the requirements of the Ecodesign Directive. Similarly, higher investment effort and expense must be expected since technically complex solutions will be required. Further downloads you can find here: I've got a rattle coming from my heating and air system. Air handlers are an important component to any HVAC system. Usually, an air handler is a large metal box containing a blower, heating and/or cooling elements, filter racks or chambers, sound attenuators, and dampers. Air handlers usually connect to ductwork that distributes the conditioned air through the home, and returns it to the air handler. Sometimes air handlers discharge and admit air directly to and from the space served, without necessary ductwork. Air handlers typically are comprised of:

Blower/fan – usually located in a large squirrel cage blower driven by an electric motor to move the air. The blower may operate at a single speed, offer a variety of pre-set speeds, or be driven by a variable drive so as to allow a wide range of air flow rates. Heating and/or cooling elements - depending on the location and the application, air handlers may need to provide heating, or cooling, or both to change the supply air temperature. Filters – air filters are almost always present and needed in order to provide clean dust-free air to the home interior. Humidifier - is often necessary in colder climates where continuous heating will make the air drier, resulting in uncomfortable air quality and increased static electricity. Mixing chamber - to maintain indoor air quality, some air handlers commonly allow the use of outside air into, and the exhausting of air from the home. A mixing chamber is used with dampers to control the ratio between the return, outside, and exhaust air.

Controls - are necessary to regulate every aspect of an air handler, such as: flow rate of air, supply air temperature, mixed air temperature, humidity, air quality. Common control components include temperature sensors, humidity sensors, sail switches, actuators, motors and controllers. Vibration isolators - since blowers in an air handler can create substantial vibration, are normally inserted into the duct immediately before and after the air handler and often also between the fan compartment and the rest of the air handler. An air handler is usually located in the garage, a closet, or in the attic unless it is part of a package HVAC unit, then the air handler is incorporated in the system. The air handler can be an up flow air handler, down flow air handler, or horizontal flow air handling unit. Call our experienced technicians at One Hour Heating & Air Conditioning®, and we’ll go over your options with you. March 2008, Volume 1, Issue 1, pp 53–63Simulation and experimental analysis of a fresh air-handling unit with liquid desiccant sensible and latent heat recoveryResearch ArticleReceived: 20 November 2007Revised: 13 February 2008Accepted: 14 February 2008DOI:

10.1007/s12273-008-8210-0Cite this article as: Xie, X., Jiang, Y., Tang, Y. et al. Build. AbstractThis article introduces a liquid desiccant fresh air processor. Its driving force is low-grade heat (heat obtained from 65 – 75°C hot water). Inside the processor, the air is dehumidified by the evaporative cooling energy of the indoor exhaust air. A four-stage structure is used to increase the efficiency of the combined sensible and latent heat recovery from the exhaust air. A mathematical model of the fresh air processor was set up using Simulink®. A liquid desiccant fresh air processor was constructed and tested for outside air conditions of 29.1 – 33.6°C, 13.7 – 16.7g/kg humidity ratio, and supply air conditions of 23.6 – 24.2°C, 7.4 – 8.6g/kg humidity ratio. The average measured COPf was 1.6 (cold production divided by latent heat removed) for the range of conditions tested. The corresponding average COPsys of the system including the regenerator was 1.3 (cold production divided by heat input).

The detailed operating parameters of each part of the test unit were also measured. The test data was compared with the simulated performance. The characteristic coefficients (such as the volumetric mass transfer coefficient of the air-water evaporative cooling module, etc.) in the mathematical model were modified to calibrate the model output to the measured data. The calibrated simulation model was used to investigate the control strategy of the fresh air processor. The flow rate of the strong solution into the unit and the number of operation stages may be controlled separately or together to meet different indoor air requirements at different outdoor conditions. The hot water driven liquid desiccant air conditioning system was compared with a typical vapor compression system with an average COP of 4.5; the pump and fan power of the proposed system was 40% of the combined chiller, pump, and fan consumption. We achieved savings of over 30% of the power consumption compared with the traditional system under the designed outdoor air conditions.