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How to Adjust Water Heater Temperature

Ask This Old House plumbing and heating expert Richard Trethewey shows how to change the temperature on your water heater for safety and energy savings

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How to Install an Electric Heat Pump Water Heater

Ask This Old House plumbing and heating expert Richard Trethewey travels to Celebration, Florida to help a homeowner select and install the right electric water heater

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How a Heat Pump Clothes Dryer Works

Ask This Old House plumbing and HVAC expert Richard Trethewey tests out a new dryer in our DIY Smarts series that uses a heat pump to dry the clothes.

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How to Diagnose and Repair a Humid Air Conditioner

Ask This Old House plumbing and heating expert Richard Trethewey travels to Orlando to diagnose and repair an HVAC system that is creating way too much humidity

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How to Maintain an Air Conditioner

Ask This Old House plumbing and heating expert Richard Trethewey shares tips for keeping an air conditioner running efficiently

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How to Install Room-By-Room Zoning in an HVAC System

Ask This Old House plumbing expert Richard Trethewey learns about an HVAC system that allows each room to be zoned out using smartphone technology.

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How to Install a GPS-Enabled Smart Thermostat

Ask This Old House plumbing and heating contractor Richard Trethewey installs a thermostat that can be programmed automatically from a smart phone

S2 E23, Richard Trethewey explains radiant-heat flooring
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How to Install Radiant Heat

This Old House plumbing and heating expert Richard Trethewey shows how to retrofit an old home with new under-floor heat

S5 E26, Richard Trethewey fixes a noisy forced-air heating system
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How to Quiet a Noisy Forced-Air System

In this how-to video, This Old House plumbing and heating contractor Richard Trethewey makes peace with a raucous heating duct

S20 E2, Richard Trethewey explains water heaters
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All About Water Heaters

Plumbing and heating expert Richard Trethewey walks through all the various options available to homeowners for purchasing or renting a water heater.

Richard Trethewey replaces a water heater
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How to Replace a Water Heater

In this how-to video, This Old House plumbing and heating contractor Richard Trethewey shows the correct—and safe—way to install a water heater

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How to Insulate HVAC Ductwork

This Old House plumbing and heating expert Richard Trethewey helps a homeowner insulate his HVAC ductwork.

Ask TOH Season 2, Ep25, Tom Silva replaces weatherstripping
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How to Weatherstrip an Exterior Door

This Old House general contractor Tom Silva shares tips for fixing a drafty door

Richard Trethewey moves a baseboard heater.
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How to Move Baseboard Heating

Ask This Old House plumbing and heating expert Richard Trethewey helps a homeowner by moving a hot water baseboard heater from one side of a room to another.

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How to Replace a Steam Radiator

Ask This Old House plumbing and heating expert Richard Trethewey replaces a small radiator with one that’s the correct size

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Baseboard Heater Making Noise? Here’s How to Fix It

Ask This Old House plumbing and heating expert Richard Trethewey helps a homeowner diagnose and solve a baseboard hot water system that makes noise.

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How to Quiet a Banging Steam Radiator

This Old House plumbing and heating contractor Richard Trethewey silences a rattling radiator

Person removing baseboard heater covers.
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Baseboard Heater Cover Removal and Replacement

Here’s how to remove your old baseboard heater covers and replace it with a new one for a fresh, clean look.

Two people installing thermostatic radiator valve to an old radiator.
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How to Install Thermostatic Radiator Valves

We show you how to add a manageable control to your old radiator by installing a new thermostatic valve.

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How to Quiet Heating Pipes

This Old House plumbing and heating expert Richard Trethewey shows how to silence noisy heating pipes.

Person inspecting a steam heating system.
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The Pros and Cons of a Steam Heating System

Considering steam heat? We help you weigh the pros and cons so you can decide if it is right for you.

Brown Pellet Stove
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How to Install a Pellet Stove

We show you how to add a pellet stove as a supplementary, efficient heat source to your house step-by-step.

Person installing thermostatic steam radiator valve.
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How to Install a Thermostatic Steam Radiator Valve

Add controls to a steam radiator with these step by step instructions and video to guide you.

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How to Seal Windows and Doors for Winter

Tom Silva shows you how to keep cold air from coming through windows and doors.

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How to Install a Ductless Mini-Split Air Conditioner

This Old House plumbing and heating expert Richard Trethewey explains how the pros retrofit a compact cooling unit.

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How to Select a Portable Air Conditioner

Ask This Old House plumbing and heating expert Richard Trethewey walks host Kevin O’Connor through the choices in air conditioners.

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How to Install a Whole-House Dehumidifier

Ask This Old House plumbing and heating expert Richard Trethewey shows how to control humidity throughout the house all year round.

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How to Choose the Right Furnace Air Filter

Reviewing air-filter options with This Old House plumbing and heating expert Richard Trethewey

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How to Install a Ductless Heat Pump

This Old House plumbing and heating expert Richard Trethewey and host Kevin O'Connor install a ductless heat pump to heat and cool a room

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How to Maximize Comfort with a Thermostat

Ask This Old House plumbing and heating expert Richard Trethewey and home technology expert Ross Trethewey discuss improvements to thermostats and how they contribute to comfort in a home

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How to Install a Whole-House Ductless System

Ask This Old House plumbing and heating expert Richard Trethewey shows a style of ductless heat pump that can be used to heat and cool an entire house

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How an Energy Recovery Ventilator (ERV) Works

Richard Trethewey explains how an Energy Recovery Ventilator (ERV) replaces conditioned indoor air with fresh outdoor air without wasting energy