Synopsis

In the airy loft of *Ask This Old House*, Tom Silva guides host Kevin O'Connor through the construction of a straightforward workbench. Joining them are Roger, Kevin, Richard Trethewey, and Tom, who ponder an unusual artifact, speculating on its purpose. Roger then offers Kevin advice on maintaining a gas-powered lawn mower. Finally, Richard silences a persistent whistling in a forced-air heating system by installing a bypass duct.