This special episode is all about making your home more energy-efficient. Plumbing and heating expert Richard Trethewey heads to Atlanta where he helps a homeowner install an instantaneous water heater to save on rising fuel costs. Then, up in the loft, landscaping contractor Roger Cook shows how proper planting of deciduous and evergreen trees can help reduce the costs of heating and cooling your house. Then, general contractor Tom Silva helps a pair of homeowners insulate the walls of their antique Victorian using blown-in cellulose insulation. Back in the loft, Tom demonstrates how to add additional fiberglass insulation to an attic.
| Title | Ask This Old House - Season 4 Episode 21 : Water Heater; Planting Trees to Save Energy; Cellulose Insulation |
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| Alternative Titles | |
| Subtitle Available |
 ETC.
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| First Air Date | 2002-10-10 |
| Last Air Date | 2025-04-03 |
| Number of Episodes | 615 |
| Number of Seasons | 23 |
| Genres | Documentary, |
| Networks | PBS, |
| Casts | Richard Trethewey, Norm Abram, Roger Cook, Kevin O'Connor, Tom Silva, Steve Thomas Rooney |
| Plot Keywords | , |
Episodes List
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Ask This Old House Season 4 :Episode 1 Mortared Stone Walkway Repair; Patching an Oak Floor
2005-10-06The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 2 Creaky Stairs; Static Cling Solution; Electric Shut-Off Valve
2005-10-13The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 3 Under-Sink Water Filter; Planting a Drought Resistant Tree
2005-10-20The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 4 Flat Tire; Aluminum Rain Gutter; Thermal Expansion Tank
2005-10-27The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 5 Rose Bushes; Wobbly Toilet; Water Leak; Hydraulic Cement
2005-11-03The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 6 Raised Garden Bed with Timbers; Clearing a Bathtub Drain
2005-11-10The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 7 Moss, Algae and Lichen; Leaky Water Valve; Planting Shade
2005-11-17The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 8 Circular Saw 101; Outdoor PEX Faucet; Cabling an Oak Tree
2005-11-24The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 9 Garage Roof Re-Shingling with Asphalt; Fiberglass Shingles
2005-12-01The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 10 Pruning an Overgrown Privet Hedge; New Laundry Sink
2005-12-08The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 11 Snowthrowers; What Is It? Installing A New Exterior Door
2005-12-15The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 12 Washing Windows; What Is It? Flushing an Electric Water Heater
2005-12-22The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 13 New Vinyl Floor; What Is It? Preventing Frozen Pipes
2005-12-29The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 14 Radon Mitigation System; Pruning an Apple Tree
2006-01-05The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 15 In-Ground Sprinkler System; Pouring a Concrete Footing
2006-01-12The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 16 Choosing Hammers; Pressure-Assisted Toilet; Plastered Wall
2006-01-19The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 17 Residential Well Repair; Repairing a Hole in Vinyl Siding
2006-01-26The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 18 Transplanting a White Spruce; Extending a Staircase Handrail
2006-02-02The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 19 Custom Radiator Cover; Installing a Steam Humidifier
2006-02-09The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 20 Granite Driveway Marker; Hot Water Radiator System
2006-02-16The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 21 Water Heater; Planting Trees to Save Energy; Cellulose Insulation
2006-02-23The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 22 Cast-Iron Radiator and Bathtub; Grading; Wobbly Newel Post
2006-03-02The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 23 Replacing an Interior Door; Leaky Kitchen Faucet
2006-03-09The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 24 Replacing a Dishwasher; Sharpening a Chisel; Lawn Spreaders
2006-03-16The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 25 Cutting Ceramic and Stone Tile; Installing a Sump Pump
2006-03-23The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
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Ask This Old House Season 4 :Episode 26 Mini-Split Air Conditioning System; De-Thatching a Lawn
2006-03-30The crew at This Old House take on some pretty big projects, which means they can only work on one or two houses a year. But homeowners have a...
