# Main Features

- [Find & Compare Materials](https://docs.buildingtransparency.org/ec3/main-features/find-and-compare-materials.md)
- [Using Specification Filters](https://docs.buildingtransparency.org/ec3/main-features/find-and-compare-materials/using-specification-filters.md): It's important to find & compare products that are of similar quality and fulfill similar jobs. Here is how to use the performance specification page to do that.
- [Geographical Regions](https://docs.buildingtransparency.org/ec3/main-features/find-and-compare-materials/geographical-regions.md): EPDs and projects are connected to various geographical locations and boundaries. This page provides details of EC3's approach to this topic.
- [Plan & Compare Buildings](https://docs.buildingtransparency.org/ec3/main-features/plan-and-compare-buildings.md)
- [Bill of Quantities](https://docs.buildingtransparency.org/ec3/main-features/plan-and-compare-buildings/bill-of-quantities.md)
- [Units of Measure](https://docs.buildingtransparency.org/ec3/main-features/plan-and-compare-buildings/units-of-measure.md)
- [Builders](https://docs.buildingtransparency.org/ec3/main-features/plan-and-compare-buildings/builders.md): Details of Builders to help you estimate quantities for typical building assemblies.
- [Material Calculators](https://docs.buildingtransparency.org/ec3/main-features/plan-and-compare-buildings/material-calculators.md): Material Calculators assist users with converting units of measure
- [Data Validations](https://docs.buildingtransparency.org/ec3/main-features/plan-and-compare-buildings/data-validations.md): Enterprise feature
- [A4 Transportation Emissions](https://docs.buildingtransparency.org/ec3/main-features/plan-and-compare-buildings/a4-transportation-emissions.md)
- [A5 Construction Phase Emissions](https://docs.buildingtransparency.org/ec3/main-features/plan-and-compare-buildings/a5-construction-phase-emissions.md)
- [Level Bids](https://docs.buildingtransparency.org/ec3/main-features/level-bids.md)


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