# Refrigerants

## <mark style="background-color:green;">😌 Simple Design</mark>

### Total Refrigerant Charge

The reduction of the total quantity of refrigerants used in the buildings HVAC+R system.&#x20;

<details>

<summary>Refrigerant Charge Choices (Carbon Intensity)</summary>

* **Low Carbon (20th percentile).** 20th percentile of the total quantity of refrigerants used in the buildings HVAC+R system.
* **Average (50th percentile).** 50th percentile of the total quantity of refrigerants used in the buildings HVAC+R system.
* **High Carbon (80th percentile).** 80th percentile of the total quantity of refrigerants used in the buildings HVAC+R system.
* **Custom**. Enter a custom carbon intensity.

</details>

<div align="left"><figure><img src="https://1738432798-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FbUXGGAJSoa5LGx4op2QD%2Fuploads%2FL9cgHYZ2G5pSsQwVVonE%2Fimage.png?alt=media&#x26;token=16ccfd0e-008b-4a42-9bc0-39298f4897e5" alt="" width="340"><figcaption><p>Choose from pre-defined refrigerant charges, or input a custom value.</p></figcaption></figure></div>

### Refrigerant GWP

The  average global warming potential (GWP) of refrigerants used in the buildings HVAC+R system. Throughout C.Scale, three options are given for specification-related options: High Carbon, Average, and Low Carbon. Typically, these refer to the 80th, 50th, and 20th percentile of GWP values for available materials. We were unable to replicate this methodology for refrigerants, though, as the overall distribution of refrigerants skews very high–and this highly skewed distribution doesn’t represent the choices designers are making on their projects. In the refrigerant model, these three choices are keyed to specific refrigerants as follows:

<details>

<summary>Refrigerant GWP Choices (Carbon Intensity)</summary>

* **Low Carbon (20th percentile).** Next-Gen Natural Refrigerant (e.g., CO2). GWP Value = 5.
* **Average (50th percentile).** Low-GWP Refrigerant (e.g., R-513). GWP Value = 700.
* H**igh Carbon (80th percentile).** HFC Refrigerant (e.g., 60% R-410a; 40% R-134). GWP Value = 2000.
* **Custom**. Enter a custom carbon intensity.

</details>

<div align="left"><figure><img src="https://1738432798-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FbUXGGAJSoa5LGx4op2QD%2Fuploads%2FjNE5MlmEsFl6bfAaKcKS%2Fimage.png?alt=media&#x26;token=9fe6ff94-e218-48ec-85ed-e0a6140ce89c" alt="" width="337"><figcaption><p>Choose from pre-defined refrigerant GWPs, or input a custom value.</p></figcaption></figure></div>

## <mark style="background-color:green;">🤓 Detailed Design</mark>

The Detailed Design configurator supports the input of project-specific data.

To begin using this feature, turn on **Detailed Design** within the Refrigerant accordion, and then click "**Configure Refrigerants**".

<div align="left"><figure><img src="https://1738432798-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FbUXGGAJSoa5LGx4op2QD%2Fuploads%2FNa87IUY3Akb1MqYOkm7e%2Fimage.png?alt=media&#x26;token=077e3aa1-600d-415d-87f8-9fecdfd27ec2" alt="" width="326"><figcaption><p>Turn on "Detailed Design".</p></figcaption></figure></div>

<div align="left"><figure><img src="https://1738432798-files.gitbook.io/~/files/v0/b/gitbook-x-prod.appspot.com/o/spaces%2FbUXGGAJSoa5LGx4op2QD%2Fuploads%2Ft90ZsBrlmoybpAuEQCao%2Fimage.png?alt=media&#x26;token=1dc6c2c3-5f17-4ae7-a23f-093291a13332" alt=""><figcaption><p>Refrigerants Detailed Design Configurator.</p></figcaption></figure></div>

You can configure refrigerants using the table and the following fields in the right-hand panel:&#x20;

#### Count

The quantity of equipment.&#x20;

#### Equipment Type

The type of equipment, which determines the refrigerant leakage rate.&#x20;

<details>

<summary>Equipment Type Choices</summary>

* Room AC-Window/Wall/Portable (240P)
* Residential AC/HP (Ducted) (240P)
* Small Self-Contained AC/HP (PTAC/HP) (240P)
* Residential Mini-Split And Multi-Split Ductless AC/HP (240P)
* Commercial Ductless VRF Systems (240P)
* Light Commercial Rooftop AC/HP Units (5-25 Tons) (240P)
* Large Commercial Rooftop AC/HP Units (>25 Tons) (240P)
* Water-Cooled Centrifugal & Screw Chillers (All Sizes) (240P)
* Air-Cooled Chillers (240P)
* Residential Refrigerators & Freezers (240P)
* Industrial Refrigeration Including Food Processing And Cold Storage (240P)
* Commercial Refrigeration (240P)
* Self-Contained Refrigeration Display Cases (240P)
* Multiplex Rack Systems (240P)
* Remote Condensing Unit Systems (240P)
* CIBSE TM65 (Type 3)
* LEED

</details>

#### Charge

The refrigerant charge associated with the equipment.

#### Refrigerant Identifier

The type and purity of the refrigerant included in the equipment.

<details>

<summary>Refrigerant Identifier</summary>

* R-11
* R-12
* R-22
* R-23
* R-32
* R-114
* R-116
* R-123
* R-125
* R-134a
* R-143a
* R-152a
* R-218
* R-236fa
* R-245fa
* R-290
* R-401A
* R-401B
* R-401C
* R-402A
* R-402B
* R-403B
* R-404A
* R-406A
* R-407A
* R-407B
* R-407C
* R-407D
* R-408A
* R-409A
* R-410A
* R-410B
* R-411A
* R-411B
* R-413A
* R-414A
* R-414B
* R-416A
* R-417A
* R-420A
* R-438A
* R-452A
* R-452B
* R-466A
* R-500
* R-502
* R-503
* R-507
* R-508B
* R-513A
* R-514A
* R-717
* R-744
* R-744A
* R-123zd(E)
* R-1234yf
* R-1234ze(e)
* R-50

</details>

#### Refrigerant GWP

The GWP of the refrigerant identifier.

#### Refrigerant Type

The chemical composition of the refrigerant identifier.

#### ASHRAE Safety Class

The ASHRAE safety class of the refrigerant identifier, which denotes the toxicity and flammability of the refrigerant identifier.