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E19 | Retaining Wall, Mini Split Upkeep | Ask This Old House

Season 23 Episode 19 | 23m 42s

Richard Trethewey demonstrates how to maintain a mini split, showing how to properly clean the indoor and outdoor components to keep the unit running optimally; then, it's rubber, round, and has a waffle shaped top. The guys play What Is It; Mark McCullough and Jenn Nawada team up to help a homeowner upgrade her house's curb appeal by building a garden retaining wall.

Aired: 04/09/25 | Expires: 04/24/25
Funding for THIS OLD HOUSE is provided by and .
Extras
Nathan installs a bathroom recessed cabinet; Mark repairs a chimney crown.
Richard installs a new gas oven; Ross meets with an expert to discuss solar EV chargers.
Mauro paints a brick fireplace; Tom and Kevin build a bathtub tray.
Jenn explores wetlands; Ross demonstrates IAQ; Mauro paints a foundation.
To celebrate 300 episodes, the guys look back at some of their best moments.
To celebrate 300 episodes, the guys look at some goofy moments from the past 12 years.
In this episode, we help two homeowners with disabilities make their homes more accessible
Tom Silva & Kevin O'Connor help Boston Marathon bombing victim Karen Rand.
In Season 14, Ask This Old House crew is hitting the road
America’s most trusted home improvement team hits the road again