You can also use the and keys
Deletions are marked like this Additions are marked like this
A Corsi-Rosenthal Cube. This cube was constructed with 4 MERV-13 filters and a cardboard bottom.

The Corsi-Rosenthal Cube (sometimes called a Comparetto Cube) is an inexpensive, do-it-yourself air cleaner that can be easily constructed out of a box fan and MERV furnace filters.

Construction guide

Goes here

A Corsi-Rosenthal Cube. This cube was constructed with 4 MERV-13 filters and a cardboard bottom.

The Corsi-Rosenthal Cube (sometimes called a Comparetto Cube) is an inexpensive, do-it-yourself air cleaner that can be easily constructed out of a box fan and MERV furnace filters.

Construction guide

Goes here

A visual guide to constructing a Corsi-Rosenthal cube with a box fan and MERV filters. Photo CC-BY al.hu.