Ask This Old House — Episode 26: Mini-Split Air Conditioning System; De-Thatching a Lawn

You are watching the episode Mini-Split Air Conditioning System; De-Thatching a Lawn Plumbing and heating expert Richard Trethewey visits a homeowner in Kansas to help install a mini-split air conditioning system. Then, Richard, along with general contractor Tom Silva, landscaping contractor Roger Cook, and host Kevin O'Connor ask, "What is it?" Then, Roger helps a homeowner "wake up the lawn" in preparation for spring by using a de-thatching machine.