High-velocity HVAC System

Air Conditioning Repair Burleson Texas

Before we begin installing the high-speed HVAC system, it is important to know the idea behind the higher-velocity HVAC device and the way it operates.

It is essentially a duct that is a small and high-velocity airflow heating and cooling system that is designed to ensure proper airflow to each room during the summer and winter seasons.

The system is equipped with 2 inches of inside diameter tubing that is supported by a wall structure to avoid obstructions.

Because of its efficiency, many homeowners opt for this HVAC system.

But, many do not know how to install it. Are you seeking ways to set up a high-velocity HVAC system? Keep an eye on the next steps to resolve all your questions.

How to Install a High-Velocity HVAC system?

Here are the steps you need to follow in order to set up an efficient HVAC system for your residence:

1. Find a suitable location for the fan unit:

This is the first process of installing a high-speed or high-velocity HVAC system.

First, you must set up the fan coil unit in an unheated space. For instance, areas like an attic, garage, or crawl space are ideal as these areas are shielded from the weather.

Additionally, you can set the fan coil in a conditioned area, like the utility room, basement, or even a closet.

It is also important to examine the air duct as well as return the location of the air filter box.

Also, take note of the location of the air supply tubing and condensate drain lines, 9-inch diameter inside diameter plenum along with refrigerant and condensate lines.

2. Reduce to the Return Air Opening:

It can be helpful to cut the opening in the return air and then pick the best spot to install the return air pipe.

Be sure to not install an air return box inside your bedrooms until you’re in the position of installation of the air duct that has the 180-degree bend.

After cutting the return air opening it is easy to pass by the coil. Be aware that this return air box has been specially designed to fit between units that measure sixteen inches long and 14 inches wide.

If you are using a freestanding vertical fan coil unit, make sure the opening is wide enough to allow 90-degree bends within the return air conduit.

Never set up the box for return until you’ve completed the entire installation process. During the installation, it is possible to run items across the return air pipe.

3. Create an online platform:

Based on the size of the fan coil unit Based on the fan coil unit size, you can build an easy platform.

We recommend using regularly 2-by-8-inch studs with at least 1/2-inch plywood to construct the platform. In addition, to ensure the best performance make use of the provided isolation strips.

Never attach a threaded rod directly onto the frame of the fan coil unit.

4. The Supply Plenum Ring

It’s a few inches lower than the bottom of the fan coil unit. This means that you need to shift the coil unit in order to accommodate the plenum ring. Then, it is ideal to connect the plenum ring with the opening in the square.

Make sure you’ve successfully connected the plenum’s ring to the unit for fan coils, and after that, connect the Plenum ring.

5. Connect the Condensate Drain

If you’ve successfully completed the four steps above now is the time to connect the condensate drain of your unit. Therefore, using local codes.

It is essential to take your condensate drainage line until you have a suitable drain. Make sure your drain line has been drained 1/4 inches per foot.

6. Attach Refrigerant Lines:

It is necessary to connect this refrigerant device to the fan coil inside, which is located from the condensing unit outside.

7. Make sure you connect the Plenum Duct correctly to Supply Tubing

When you install the air distribution elements in accordance with your sizing factor, draw an outline of the system. Make sure that when you are in the process when installing your HVAC system, you must cut off the plus side part of the front section.

The next thing you must do is insert the duct into the collar of the coil of your fan.

To create an elongated joint, you need to move the plenum duct to the right. Also, you will need to install flat headpins. Be sure that the insulator has been installed within your fan’s unit.

After you have successfully installed the plenum duct, secure the cap on the plenum’s end to ensure it stays in the correct position. It is recommended that you attach the pins with a flat head through the tabs of sheet metal.

8. Installation of Sound Attenuation Tubing

Find out in which you would like to place the room’s terminator. But, if you’d like to place it in an area that is a celling corner it must be five inches from the wall edge.

To connect the outlet, it is necessary to drill a minimum 1/8 inch hole. You should also maintain at three inches of space around the hole of 1/8 inch.

Additionally, you must connect the room’s terminator with tubing that impedes sound.

If you are installing the terminator on the floor it is recommended to create an inch-sized screen and then modify the terminator’s position inside the tubing connector as well as the faceplate.

9. Set up Supply Tubing

Additionally, you will need to connect the tubing supply to its proper length and lengths thoroughly.

Keep in mind that the length of the tubing is 30 feet while the minimum should have to be six feet.

Then, you can install the tubing supply. To secure the two parts then put the adhesive tape on the connector. Then, you can use an action twist to connect the connectors.

After you have completed the supply run installation:

  1. Set up the air return duct, as well as the airbox.
  2. Remove the return airbag and then disassemble them from each other.
  3. The return air box should be placed inside the opening for return air which you cut previously.
  4. After that, you can place your return grill in the box.

Following that, you need to connect each part of your return air flexible conduit to the fan coil’s elliptical slant end.

10. Electrical Connections

The next step is to connect the thermostat at low voltage with the control block for low voltage. Make sure that for it to operate effectively, electrical service requires the power supply 208/230/60/1.


As you can tell, installing an extremely fast or high-velocity HVAC system isn’t exactly an easy task. If you decide to install the system yourself, there is a high chance that you could cause harm to yourself. So, if you want to install a high-speed HVAC system, it’s always advised to employ or hire Burleson Best AC & Heating Repair LLC an experienced HVAC repair, maintenance, and installation service company that will take care of this high-velocity HVAC System installed on your behalf.