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content/articles/2023-09-18-introducing-psychrometrics-cli.md

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+---
+tags: HVAC, psychrometrics, software
+title: "Introducing Psychrometrics Cli"
+---
+
+# Introducing Psychrometrics CLI
+
+Today, I'm releasing a command line application that is built on top of my
+[swift-psychrometrics](https://github.com/swift-psychrometrics/swift-psychrometrics) package, that I open sourced over 2 years ago.
+
+The application consists of many calculations / conversions for psychrometric properties of an air stream. The tool works for both imperial
+and metric units. The application will work natively on macOS, but can also be ran through a `docker` container on other platforms.
+
+## Why
+
+I spend a lot of time in my terminal, because I can work so much more efficiently. I discovered many years ago that the more I can do using
+simple applications and keyboard over a mouse and a web browser or native application the more I can accomplish. I understand this is
+intimidating for many who think they are _"not good with computers"._ I can assure that was me several years ago, I would only encourage you
+to not be afraid and give it a shot. We are at a time in society where it is easier than ever to get informed and learned new skills.
+
+## Installation
+
+For complete installation instructions, you can view the [github](https://github.com/swift-psychrometrics/psychrometrics-cli) repository.
+
+The following instructions are based on using macOS.
+
+### Open your terminal application.
+
+Personally, I use [iTerm2](https://iterm2.com/), however you can use the default `Terminal` app. Found at
+`/Applications/Utilities/Terminal.app`.
+
+## Install Homebrew
+
+We use [Homebrew](https://brew.sh) for package distribution of the pre-built application binaries. You can follow their instructions to
+install.
+
+### Tap our custom formula tap.
+
+```bash
+brew tap swift-psychrometrics/formula
+```
+
+### Install the psychrometrics application
+
+```bash
+brew install psychrometrics
+```
+
+That's it!
+
+## Usage
+
+I will run through a couple of the commands that are supplied with the application and show what you can expect the outputs to be.
+
+### Properties
+
+The following command will output a bunch of the psychrometric properties of an air stream. There are several ways to call it, but generally
+you will supply the dry bulb temperature and the relative humidity.
+
+Below, we calculate the psychrometric properties based on 75°F and 50% humidity.
+
+```bash
+psychrometrics --dry-bulb 75 --relative-humidity 50
+```
+
+![properties-output](/articles/images/2023-09-18-properties.png)
+
+### Dehumidifier Sizing
+
+If you've read some of my recent articles on calculating the
+[dehumidifier size required based on the latent load](https://mhoush.com/posts/sizing-dehumidifier-by-latent-load/), the application also
+ships with a calculation that will do this for you and has the ability to calculate it at different `coverages` that you can supply.
+
+For example if we've done a load calculation and determined that we have a latent load of `4,334 BTU/h` then we could run the following
+command to see what size dehumidifier is needed for `100%, 85%, and 70%` of the latent load.
+
+```bash
+psychrometrics dh size --coverage 100 85 70 --verbose 4334
+```
+
+![dh-size](/articles/images/2023-09-18-dh-size.png)
+
+### Pounds of Water Removed
+
+I also recently wrote an article about [calculating the pounds of water removed](https://mhoush.com/posts/pounds-of-water-removed/) from an
+air stream given the grains of moisture removed.
+
+Below is an example of calculating the pounds of water removed per hour based on the example in the article (14 delta-grains)
+
+```bash
+psychrometrics dh pounds-removed --delta 14 --cfm 797 --verbose
+```
+
+![pounds-removed](/articles/images/2023-09-18-pounds-removed.png)
+
+### Help
+
+You can use `--help` option to show help and the list of commands provided.
+
+![help](/articles/images/2023-09-18-help.png)
+
+If you have any questions then feel free to email or message me. I hope some of you may find this application useful.