Heating & Cooling Videos
These This Old House videos showcase all of our heating & cooling projects, how-tos, and designs.
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How to Install Baseboard Radiator Covers
When a homeowner’s aged baseboards were detracting from the look of their renovations, they called the team at Ask This Old House for a solution. Plumbing and heating expert Richard Trethewey saves the day with new baseboard covers.
What to Know Before Switching to Whole House Heat Pumps
Home technology expert Ross Trethewey teaches host Kevin O’Connor about heat pumps and how they aren’t a one-size-fits-all solution.
When To Upsize a Water Heater
Plumbing and heating expert Richard Trethewey diagnoses and solves a homeowner’s lack of hot water.
How to Create a House HVAC Plan
Richard Trethewey demonstrates heat loss and gain to design a balanced HVAC system.
How To Weatherstrip a Wood Door and Lower Energy Bills
Weatherstripping a wood door is a valuable DIY project that can improve your home's energy efficiency and comfort. Learn how to do it in our step-by-step guide.
Fixing Ice Dams on a Roof
Home technology expert Ross Trethewey helps a homeowner solve an ice dam issue with smart insulation practices that also improve the home’s efficiency.
Why is Furnace Maintenance Important?
Plumbing and heating expert Richard Trethewey teaches host Kevin O’Connor about furnaces and why it’s important to maintain them properly.
Everything You Need to Know to Replace a Water Heater
In this DIY Smarts segment, plumbing and heating expert Richard Trethewey helps a homeowner replace their old tank water heater before it fails.
Reasons for Water Heater Failure and When to Replace a Heater
Plumbing and heating expert Richard Trethewey gives host Kevin O’Connor an inside look at why a water heater fails and when to replace one.
All About Smart Thermostats
Home technology expert Ross Trethewey explains everything there is to know about modern smart thermostats.
How to Save Money on Heating Bills
Watch as This Old House plumbing and heating expert Richard Trethewey and home technology expert Ross Trethewey teach some cost-effective ways to save money on heating this winter.
Future House | Understanding Heat Pumps
Ask This Old House home technology expert Ross Tretheway explains everything you need to know about heat pumps.
Types of Water Heaters
Plumbing and heating expert Richard Trethewey walks us through the pros and cons of different types of water heaters.
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.
Serviceable Plumbing and HVAC Installations
Watch as Richard Trethewey and John Deforge of SG Harold Plumbing and Heating discuss the challenges that service technicians face on the job.
Cape Ann Project Heating Plan
Our plumbing and heating expert Richard Trethewey explains the general layout of the heating and cooling system in our Cape Ann project
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
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
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
How To Adjust Water Heater Temperature
Ask This Old House expert Richard Trethewey shows how to change the temperature on your water heater for safety and energy savings.
How To Fix a Noisy Baseboard Heater
Ask This Old House plumbing and heating expert Richard Trethewey helps a homeowner diagnose and solve a baseboard hot water system that makes noise.
How to Heat a Garage Workshop
Ask This Old House plumbing and heating expert Richard Trethewey travels to Akron, Ohio to install a garage heater.
How To Install an Electric Heat Pump Water Heater
This Old House plumbing and heating expert Richard Trethewey helps a homeowner select and install the right electric water heater.
How to Choose and Use an Air Conditioner for Your Home
Ask This Old House plumbing and heating expert Richard Trethewey walks host Kevin O’Connor through the choices in air conditioners.
How To Install a Whole-House Ductless System for Your Home
Looking for a more energy-efficient way to heat and cool your home? Learn all about whole-house ductless systems in our comprehensive guide.
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
How an Energy Recovery Ventilator (ERV) Works
Learn how an energy recovery ventilator (ERV) works and the benefits it provides in this guide and video featuring Richard Trethewey.
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.
Sizing up a Home Heating System
Richard Trethewey explains how to assess a home’s heating system – and figure out whether you’ll need to replace it
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
How to Install a Wall Mounted Space Heater
Ask This Old House master electrician Scott Caron warms up a chilly bathroom by installing an electric convection heater.
How To Diagnose Problems With a Hot Water Heating System
Ask This Old House plumbing and heating expert Richard Trethewey helps a homeowner figure out why one of her radiators is not working.
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.