Free Online Interactive Psychrometric Chart World's first online, and only! A convenient, precise and customizable psychrometric chart & calculator tool for HVAC engineers. Support IP and SI units. Or input data for air properties Set point to -1,-1 to start new line. Select 2 point # State changes from point A to B Mixed air from state A and B Compute and draw processing line Primary return air cycle Max vent temperature difference Compute and draw primary cycle Secondary return air cycle Compute and draw secondary cycle Apparatus dew point humidity: Reset all inputs base on unitsWe have a free small game for you: Survive Broken Copter. Click to start play. Dry Bulb Temperature, °C. Pressure = 101325 Pa SENSIBLE HEATQsTOTAL HEATQt=HUMIDITY RATIOdWENTHALPYdH=-880.00.10.20.30.40.50.60.70.80.91.01.01.52.04.08.0-0.2-0.5-1.0-2.0-4.00.01.02.02.53.04.05.06.07.08.010.0-1.0-2.0-5.0-10.08 Sorry, your browser does not support inline SVG.

For windows, without network and browser limits. Download V4.4 for free trial Buy Now for $65 Free Online Interactive Psychrometric Chart The properties of air vary from place to place, by time of year, and even hourFor many practical reasons, from human comfort to industrial process design, the ability to determine and modify the properties of air is The calculator accepts entries in either IP (inch-pound, or "English" units) or SI (System International, or "Metric" units). The initial dispaly will be in IP units.   To calculate in SI units, use the "Switch to SI" button. one of which is either the elevation (altitude) for the site or known absolute pressure, plus two known or desired air property values. the dropdown menu for each line to select the desired set of input units Enthalpy of Dry Air Humidity as Weight Ratio Altitude (feet or meters) Pressure (inches or mm) of Mercury (Hg) Pressure (psia or KPa)

Specific Volume of Dry Air Vapor Pressure (Mercury - Hg) psychrometric calculation applet created by the Linric Company. It utilizes standard industry accepted equations and calculations. It is made available for use by visitors to this web site under license. produces a family of psychrometric analysis software products tailored for various user platforms, including PsycPro,floor air conditioning units at lowes the chart generation and process analysis software tool which was used to create the5 ton ac unit 20 seer sea-level psychrometric charts which are available for download from this site.how to charge a ac unit with r22 Universal Industrial Gases, Inc.2200 Northwood Ave. Suite 3Easton, Pennsylvania 18045-2239 USAPhone (610) 559-7967 Fax (610) 515-0945 All material contained herein Copyright 2003

In construction, the R-value is the measurement of a material's capacity to resist heat flow from one side to the other. In simple terms, R-values measure the effectiveness of insulation and a higher number represents more effective insulation.For instance if you have a material with an R-value of 12 attached to another material with an R-value of 3, then both materials combined have an R-value of 15. As we said before, the R-value measures the thermal resistance of a material. This can also be expressed as the temperature difference that will cause one unit of heat to pass through one unit of area over a period of time. In the equation below, the imperial units are shown on the left and the SI units are shown on the right. Many energy modeling programs and code calculations require U-factors (sometimes called U-values) of assemblies.  The U-factor is the heat transfer coefficient, which simply means that is is a measure of an assembly's capacity to transfer thermal energy across its thickness.

The U-factor of an assembly is the reciprocal of the total R-value of the assembly. The equation is shown below. The R-values for specific assemblies like doors and glazing in the table below are generalizations because they can vary significantly based on special materials that the manufacturer uses.  For instance, using argon gas in a double pane insulating glass unit will dramatically improve the R-value.  Consult manufacturer literature for values specific to your project. Minimum 1/2" up to 4"1.00 Medium Density Particle Board1/2"0.53 R-11 Mineral Fiber with 2x4 metal studs @ 16" OC5.50 R-11 Mineral Fiber with 2x4 wood studs @ 16" OC12.44 R-11 Mineral Fiber with 2x4 metal studs @ 24" OC6.60 R-19 Mineral Fiber with 2x6 metal studs @ 16" OC7.10 R-19 Mineral Fiber with 2x6 metal studs @ 24" OC8.55 R-19 Mineral Fiber with 2x6 wood studs @ 24" OC19.11 Polyurethane Foam (Foamed on site)1"6.25 Concrete Masonry Unit (CMU)4"0.80 Concrete Masonry Unit (CMU)8"1.11

Concrete Masonry Unit (CMU)12"1.28 Concrete 60 pounds per cubic foot1"0.52 Concrete 70 pounds per cubic foot1"0.42 Concrete 80 pounds per cubic foot1"0.33 Concrete 90 pounds per cubic foot1"0.26 Concrete 100 pounds per cubic foot1"0.21 Concrete 120 pounds per cubic foot1"0.13 Concrete 150 pounds per cubic foot1"0.07 Aluminum / Vinyl (not insulated)0.61 Aluminum / Vinyl (1/2" insulation) 1.80 Carpet with fiber pad2.08 Carpet with rubber pad1.23 Double Pane with 1/4" air space1.69 Double Pane with 1/2" air space2.04 Double Pane with 3/4" air space2.38 Triple Pane with 1/4" air spaces2.56 Triple Pane with 1/2" air spaces3.23 Wood, solid core1 3/4"2.17 Insulated metal door 2"15.00 , and Building Construction Illustrated by Francis D.K. Ching. Other minor sources were also used. Archtoolbox does not test materials or assemblies. The links below will take you to Archimat, our building product directory, which hosts a list of manufacturers.