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HVAC Plan Symbols

> Floor Plan Symbols > HVAC Plan Symbols
Posted by James Freeman | 01/15/2021

Part 1: What are HVAC Plans and their Symbols?

HVAC, which stands for Heating, Ventilation, and Air Conditioning, provides the overall environmental components of a structure to maintain optimal air quality.

Architectures and engineers provide an overall plan that is focused on the ventilation of air, thermal heating, cooling, and air conditioning. To depict all these things, some standard symbols are used in the floor plan. Therefore, before you learn how to make an HVAC plan, you should be familiar with its commonly used symbols. Most of the HVAC plan symbols are from different categories like control, ductwork, equipment, etc.

Part 2: What are the HVAC Plans used for?

Since HVAC plans would provide the overall floor plan related to heating, cooling, and ventilation, they can be used in different ways.

  • It acts as a first step in setting the air conditioning or the thermal system in any building
  • After coming up with an HVAC plan, you can tell your clients about the overall budgeting and deadlines.
  • An HVAC plan would help you decide the cost of other tools and equipment that should be installed in the structure.
  • Apart from being a vital tool for construction and engineering, it can also help in maintaining and planning the system.

HVAC Diagram

image source: https://energyeducation.ca/encyclopedia/HVAC

Part 3: HVAC Equipment Symbols

One of the best things about HVAC plans is that they can include almost all the major equipment related to heating, cooling, and ventilation. You can find some of the following HVAC plan symbols for equipment. The following HVAC equipment symbols contain Pump, Fan, Moisture Eliminator, Filter, Silencer, Valve, Compressor, Muffler, etc.

HVAC Equipment Symbols

The Pump is a commonly used mechanical device that is used to pump water or put pressure to raise gas.


The Silencer is mostly placed at the motor to reduce noise production.


The Condenser is a vital part of any HVAC plan, it is a heat transfer equipment that can condense vapor into liquid.


The Drier is a kind of substance or device to accelerate the drying or extract moisture.


The Muffler is an advanced form of a silencer that can be included in any device to inhibit its noise.


The Filter is a porous device for removing impurities or solid particles from a liquid or gas that passes through it.


The Nozzle is a cylindrical or round spout at the end of a pipe, hose, or tube used to control the direction, or the velocity of a gas or liquid flow.


The Pipeline is a long pipe, typically underground, for transporting oil, gas, etc. Almost any HVAC plan would have pipelines to depict the transfer of liquids and gases.


The Chiller is a machine for removing heat from a liquid through a circle of vapor compression, absorption, and refrigeration.


The Fan blades are mostly drawn wherever a fan or exhaust would be placed in the HVAC plan.

The Boiler is used in thermal systems as it boils the liquid to make it hot or convert it into vapor.

The Air compressor. It simply compresses the air in any room to improve its quality to inhibit pollutants..

The Humidifier. A humidifier ideally adds moisture to the air to prevent it from dryness and improves its quality.

The Ventilator is the core of the ventilation system as it takes away the impure air from the building and dehumidifies the incoming air.

The Heater. This mostly has a blower and heating rods attached to heat the air and keep the temperature regulated.

Part 4: HVAC Ductwork Symbols

In most of the houses these days, there is a dedicated system of ducts that are installed to keep the building’s temperature regulated. In this case, you can consider the following HVAC plan symbols for ductwork. The following HVAC ductwork symbols show the different ductworks and junctions: straight duct, miter bend, miter bend, 3-way junction, Y junction, and transition.

HVAC Ductwork Symbols

The Bent duct pipe is a curve part in a road, river, path, or racing circuit. It is a L-shaped and is installed at the bending points.


The Y junction generally has 2 arms of equal size.

Y junction

The 3-way junction.These pipes are installed when a single input is divided into three segments.

The Transition is the process or a period of changing from one state or condition to another. The equipment is placed where one state in the pipe is changed to another.


The VAV box stands for a Variable Air Volume box that ensures the constant flow of air at a regular temperature.


The Straight duct pipe. This is simply the I-shaped straight pipe that is installed in the ducting.

The Variable pipes. Apart from the L-shaped bends, there are also U-shaped variable bents that can be installed.

The Junction pipes. These pipes are installed when a single pipe reaches the junction of the system.

The Supply is placed at the supply of the ducting system.

Part 5: HVAC Controls Symbols

The control symbols in an HVAC plan are mostly used for measurement, regulation, and other equipment to manage the entire system. The following HVAC controls symbols include commonly used shapes that represent for measuring temperature, flow, velocity, voltage, current, light, timer, power, and more.

HVAC Controls Symbols

The Temperature is used to show the present temperature of the system or the room.


The Humidity shape shows a kind of device to measure humidity.


The Timer is placed wherever we need to put a timer or perform a countdown.


The Air quality is to depict dedicated devices to measure the quality of the air in the system.

Air Quality

The Pressure. It measures the current pressure in the system and displays its value.

The Voltage and current. These units are placed to measure the electric current and the voltage in the system.

Part 6: HVAC Control Equipment Symbols

Lastly, any HVAC plan would be incomplete without including some control equipment symbols to depict their working and other parameters. The following HVAC control equipment symbols include duct, sections, pipe, VAV box, heater, damper, boiler and more.

HVAC Controls Equipment Symbols

The Duct is a tube or passageway in a building or machine for air, liquid, cables, etc. This depicts the specific duct pipe that is passed to carry liquids or warm/cool air.


The Damper is a kind of device that has a subduing or inhibiting effect. The device has inhibiting effects that regulate and redirect the airflow.


The VSD is a hole in the wall separating the two lower chambers of the heart. It stands for a Variable Speed Device that separates two chambers and regulates the speed of flow.


The Pipe flow. This is used to show the direction in which any liquid or gas flows in a pipeline.

The Unit Heater. The equipment is placed at specific places (units) to provide heating.

The Propeller. This is mostly the part of the ventilator system to pass through air.

The Valve. A valve can be placed anywhere in the HVAC plan that would turn on/off the flow in the pipeline.

Part 7: HVAC Plan Software

Edraw HVAC plan software will offer you plenty of useful HVAC symbols and efficient drawing tools to make precise HVAC plans. It's essential to examine your blueprints with the HVAC arrangements if you are in the process of designing a building. Don't miss out on free HVAC symbols and floor plan software.

HVAC Plan Software


All-in-One Diagram Software
Create more than 280 types of diagrams effortlessly
Start diagramming with various templates and symbols easily
  • Superior file compatibility: Import and export drawings to various file formats, such as Visio
  • Cross-platform supported (Windows, Mac, Linux, Web)
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All these HVAC symbols are free for use with Edraw HVAC maker. You can easily drag and drop any symbols on the canvas to make an HVAC plan. Once finished, the drawing can be saved and exported into standard formats in Edraw Max, including Word, Excel, PPT, SVG, JPG, TIFF, PNG, HTML, etc.

In addition, you can learn the HVAC plan design guide here. The picture below shows an HVAC plan example that is made by Edraw Max.

HVAC Plan Design Example

Get Started! You Will Love This Easy-To-Use Diagram Software

EdrawMax is an advanced all-in-one diagramming tool for creating professional flowcharts, org charts, mind maps, network diagrams, UML diagrams, floor plans, electrical diagrams, science illustrations, and more. Just try it, you will love it!