> For the complete documentation index, see [llms.txt](https://docs.betterbuilding.io/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.betterbuilding.io/user-guide/2d-building/building/hvac/space-hvac/packaged-terminal-heat-pump-split-system/heating-coil.md).

# Heating Coil

## Sizing

<figure><img src="/files/nec8N3xXFfGkk5hX5hW4" alt=""><figcaption></figcaption></figure>

### Heating Coil Rated CoP

Specify the Heating Coil Rated CoP by entering a numeric value, defining the coefficient of performance (COP = gross heating capacity in watts divided by electrical power input in watts) of the DX heating coil unit at rated conditions.

### Sizing Method

Specify theSizing Method by selecting from Autosize or Manual.

### Heating Coil Rated Air Flow Rate

Specify the Heating Coil Rated Air Flow Rate by entering a numeric value, defining the volume air flow rate across the DX heating coil at rated conditions.

### Heating Coil Rated Capacity

Specify the Heating Coil Rated Capacity by entering a numeric value, defining the total, full load gross heating capacity in watts of the DX coil unit at rated conditions.

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