HVAC System, Components Design and Engineering Data

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The following are HVAC Systems and Components Design Data and other resources.

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• Accurate Heating and Cooling Load Calculations - Premium Membership Required
• Air Conditioning Size Calculator and Estimator Chart This calculator is provided for use to calculate basic size in BTU to adequately cool a room of know size.
• Air Conditioning System Design and Analysis Document This is an introduction to air conditioning systems (frequently referred to as HVAC systems – heating, ventilating and air conditioning systems).
• Ammonia Anhydrous Properties at Saturation Excel Reference Tables - Ammonia Anhydrous Properties Include, saturation at temperature, saturation at pressure, saturation at subcool superheat and more
• Psychrometric Chart US and SI Units at Sea Level - Printable, 11" x 17" Barometric Pressure: 29.921 Inches of Mercury (101.04 lPa), Enthalpy - BTU per Pound of Dry Air, Saturation Temperature, Enthalpy BTU per. Pound of Dry Air. Premium Membership Required
• Psychrometric Chart US and SI Units at 5000' Above Sea Level - Printable, 11" x 17" , Enthalpy - BTU per Pound of Dry Air, Saturation Temperature, Enthalpy BTU per. Pound of Dry Air. Premium Membership Required
• Psychrometric Chart US and SI Units at 7500' Above Sea Level - Printable, 11" x 17"
• ASHRAE Refrigerant Applications ASHRAE Refrigerant , Components (Weight %), and Applications
• Basic Mechanical Refrigerant System As the piston moves down, low-pressure gas (refrigerant) is emitted through the compressor valve to fill up the cylinder.
• Custom Sheet Metal Fabrication Review Custom sheet metal fabrication services providers are organizations that fabricate components by forming, cutting, rolling, bending, punching, trimming, stamping and welding sheet metal.
• Dampers HVAC Industrial HVAC dampers are also used to regulate room temperatures or other environmental parameters.
• Distance Bend to Mold Line Equation and calculator for determining the bend line to mold allowance when forming sheet metal.
• Gauge Charts Sheet metal gauge size reference chart gives the weight and thickness of sheet metal given as a "gauge" and indicates the standard thickness.
• HVAC Air Conditioning Engineering Air conditioning (of which refrigeration is an inseparable part) has its origins in the fundamental work on thermodynamics which was done by Boyle, Carnot and others
• HVAC ASHRAE Psychrometric Chart ASHRAE Psychrometric Chart No.1 Normal Temperature Barometric Pressure: 29.921 Inches of Summary
• HVAC Air Change Out Frequency (minutes) General recommendations for total volume of air change out for selected type indoor air spaces.
• HVAC Air Duct Flow Resistance Chart HVAC duct flow resistancechart. Friction in Inches of Water per 100 Feet Friction of Air in Straight Duct
• HVAC Damper Pressure Drop Typical HVAC damper pressure drop vs flow velocity graph. Units are inches and fpm (feet per minute).
• HVAC Heating, Ventilation and Air Conditioning Load Calculator - Membership required to download
• HVAC Air Handling Unit Design Excel Calculator
• HVAC Rectangular to Round Duct Equivalent HVAC Rectangular to Round Duct Equivalents
• HVAC Screen Pressure Drop HVAC screen pressure drop graph.
• HVAC / Air Conditioner Size Calculator SpreadsheetRequires an active Premium Membership
• Improving Fan System Performance Fans specification, installation and design equations
• Louver HVAC Industrial Louvers are normally installed into a wall or other location to provide positive ventilation for a room or encloses area.
• Portable Air Conditioners A portable air conditioner, also called "Spot Coolers" is a ac unit on wheels that can be easily transported inside a home or office.
• Pressure Drop Equivalent Length of Pipes and Fittings Pressure Drop Equivalent Length of Pipes and Fittings Screwed , turbulent flflow only, equipment length in feet.
• Principles of Refrigeration Technical Guide Premium membership required
• Refrigerant Line Capacities for 134a Refrigerant Line Capacities for 134a Adapted from ASHRAE HVAC Refrigeration Handbook
• Residential Duct Systems Design Calculations Excel Spreadsheet, ACCA Manual D, 3rd Edition
• R22 Refrigerant Line Capacities Refrigerant Line Capacities for R22 Tons for 100 ft. - Type L. Copper, Suction Lines, Δt = 2°F
• R-502 Refrigerant Line Capacities R-502 Refrigerant Line Capacities Tons for 100 ft. - Type L. Copper, Suction Lines, Δ t = 2°F
• R-717 (Ammonia) Refrigerant Line Capacities R-717 (Ammonia) Refrigerant Line Capacities Tons for 100 ft.
• Sheet Metal Design Menu links of sheet metal design resources, tools, articles and other useful data.
• Sheet Metal Definitions Terms Sheet metal mechanical tolerances of flatness, minimum bend radii for Aluminum, stainless steel