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How to Zone a Forced-Air Furnace and Air Conditioner

Ask This Old House plumbing and heating expert Richard Trethewey shows how to divide a home's heating and air-conditioning system into different zones

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How to Install a Whole-House Humidifier

Ask This Old House plumbing and heating expert Richard Trethewey shows an efficient, low-maintenance way to humidify the air

How to Smartify Your Home

Better to buy a hub or stand-alone devices? Sign up with the cable company? Get a Wi-Fi dog camera? Find answers to these and other questions in our connected-home guide of picks and expert advice

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How to Install an Electric Whole-House Fan

This Old House general contractor Tom Silva helps a homeowner install an energy-efficient whole-house fan

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How to Replace a Direct-Vent Water Heater

This Old House plumbing and heating expert Richard Trethewey shows how to install a new water heater when there's no chimney

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How to Install a Fiberglass Entry Door

This Old House general contractor Tom Silva shows how to upgrade an entryway with a brand-new, low-maintenance, energy-efficient door

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How to Install Weather-Sensitive Heating Controls

Save energy and stay cozy by linking your system to the outside temperatures

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How to Weatherstrip a Front Door

This Old House general contractor Tom Silva shares his fast fixes for a drafty door

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How to Choose a Thermostat or Home Automation System

This Old House plumbing and heating expert Richard Trethewey reveals how home automation delivers comfort, convenience and energy savings

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How to Quiet Knocking Baseboard Heat

Silencing squeaky, creaky pipes with This Old House plumbing and heating expert Richard Trethewey

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How to Quiet a Noisy Baseboard Heater

Silencing a rattling metal heating unit with This Old House plumbing and heating expert Richard Trethewey

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How to Vent a Bath Fan Through the Roof

This Old House general contractor Tom Silva shows how to properly install a roof-mounted bath-fan vent

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How to Repair a Whistling and Leaky Steam Radiator

This Old House plumbing and heating expert Richard Trethewey silences a leaky, squeaky steam radiator

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How to Repair Radiator Air-Vent Threads

In this video, This Old House plumbing and heating contractor Richard Trethewey and host Kevin O'Connor shows how to cut threads for a new air vent

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How to Fix Leaks in Air Ducts

This Old House host Kevin O'Connor and energy auditor Paul Scheckel find and fix leaky heating ducts

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How to Install a Forced-Air Bypass Damper

This Old House plumbing and heating contractor Richard Trethewey quiets a whistling heating duct

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How to Weatherstrip a Wood Door

Enhancing the energy efficiency of an old, drafty door with This Old House general contractor Tom Silva

10 Ways to Beat the Heat

Staying cool this summer doesn't necessarily mean you have to pay a fortune to keep the air conditioning running day and night

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How to Convert Radiators into Multi-Zone Heating

Upgrading an old radiator heating system with This Old House plumbing and heating expert Richard Trethewey

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How to Install Radiant Heat Under a Solid-Wood Floor

This Old House general contractor Tom Silva shows how to run radiant-heat tubing under a new hardwood floor

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How to Retrofit Radiant Heat From Above

This Old House plumbing and heating expert Richard Trethewey shares tips for installing new radiant-heat tubing on top of an old subfloor when there's no access from below

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Preparing a Home for a Blower-Door Test

When doing an energy audit in preparation for weatherizing a home, you have to seal cracks and openings in the building before you turn on the fan

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Installing a Whole House Fan

This Old House general contractor Tom Silva shows a quick and clever way to keep a home cool

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Electric Radiant Heating

In this video, This Old House plumbing and heating contractor Richard Trethewey explains the basics of installing electric radiant heat

How to Install an Energy-Saving Programmable Thermostat

Save on your energy bill with controls that automatically change the temperature settings

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How to Install an Air Valve for a Hot-water Heating System

In this how-to video, This Old House plumbing and heating contractor Richard Trethewey prevents trapped air from stopping a heating system cold in its tracks

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How to Install a Programmable Thermostat

In this how-to video, This Old House plumbing and heating contractor Richard Trethewey shows how to install an automatic, fully programmable thermostat

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How to Build a Radiator Cover

In this how-to video, dress up an ugly radiator with This Old House general contractor Tom Silva

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How to Install Electric Radiant Heating

In this how-to video, This Old House plumbing and heating contractor Richard Trethewey explains the warming attributes of electric radiant heat

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How to Position Mini-Duct Air Conditioning

In this how-to video, This Old House plumbing and heating contractor Richard Trethewey explains the benefits of this fit-anywhere cooling system

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How to Create Zones in a Hot-Water Heating System

In this how-to video, This Old House plumbing and heating contractor Richard Trethewey shows how to share the warmth by installing zone valves

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How to Install a Mini-Split Air Conditioner

In this how-to video, keep cool with This Old House plumbing and heating expert Richard Trethewey