Heating & Cooling
How To Install Electric Radiant Heating
Watch as This Old House plumbing and heating contractor Richard Trethewey explains the warming attributes of electric radiant heat.
Ceiling Fan Designs: Globe, Vintage, Modern, & More
From Victorian charm to sleek stainless steel, there’s a ceiling fan to suit every taste. Find the right design for your home.
How To Create Zones in a Hot Water Heating System
Zoning can improve comfort levels and energy efficiency. Discover how to create zones in a hot water heating system in this guide and video.
How to Paint a Cast Iron Radiator
This Old House plumbing and heating contractor Richard Trethewey follows a painting expert as he revitalizes an old radiator.
A Complete Guide to Replacing a Baseboard Heating Cover
In this guide, we show you how to remove your baseboard heater covers and replace it with a new one for a fresh, clean look.
How To Maintain and Care for a Steam Radiator
In this how-to video, This Old House plumbing and heating contractor Richard Trethewey shows how to silence a whistling radiator.
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.
How To Install a Mini-Split Air Conditioner for Your Home
In this how-to video, This Old House plumbing and heating expert Richard Trethewey demonstrates how to install a mini-split air conditioner.
How to Build a Radiator Cover Cabinet With Simple Tools
Is rust or peeling painting turning your radiator into an eyesore? Give it a fresh look with this simple DIY cover.
Recycling Vintage Registers
Put decorative relics of turn-of-the-century central heating to reuse in your house
Clean Heat: All About Pellet Stoves
Pellet stoves are gaining popularity, and for good reason. These heating units are cleaner, greener, and cheaper than many alternatives.
Winter Construction Dome
Work 'tents' let your projects progress in the deep freeze
Why It’s Worth Investing in a Radiant Floor Heating System
In this guide, our experts compare hydronic and electric floor heating costs, installation considerations, and energy efficiency.
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Types of Insulation for Your Home
Understanding the various types of insulation available and their applications can help you decide how to best insulate your home.
All About Building an HVAC
Keep reading to learn about the best HVAC technologies for indoor comfort and energy efficiency, according to This Old House plumbing and heating expert Richard Trethewey.
25 Years of Innovation: Ceiling Fans
Today's models are marvels of quiet efficiency, available in almost every style imaginable
How To Choose a Vintage Radiator
Vintage iron radiators offer comfort on a cold day and style year-round. Read our guide to choosing a vintage radiator for your home.
Fall Furnace Maintenance
Now's the time to service your heating system
What to Know Before Calling a HVAC Pro
In this guide, we'll walk you through everything you need to know to ensure you have a smooth experience with your HVAC professional.
10 Easy Ways To Cool Your Home, From AC to Attic Ventilation
Keeping your home cool doesn't mean you have to pay a fortune to keep the AC running all day. Read our guide for tips on how to keep your home cool without incurring huge bills.
This New Radiator
HVAC expert Richard Trethewey warms to the topic of the McCues' new European-style heating system in Manchester.
Comfortable Construction: Temporary Heat in a Cold Climate
HVAC specialist Richard Trethewey explains how he used a portable heating system using a material called PEX to keep the This Old House team warm while working in Massachusetts.
What You Need to Know to Choose an Air Conditioner
In this guide, we tell you everything you should know about purchasing a new AC unit, including how to choose the best size and power level.
13 Ways to Keep Your House Warm This Winter
Check out our list of tips, tricks, and upgrades for keeping your house warm in the winter and cutting down on your heating bills.
The Case for Installing a Heat-Recovery Ventilator
Thoroughly insulating a house will hold in the heat, but it will also hold in all the moisture. That could promote rot.
Maintaining Air Conditioners
A regular maintenance routine helps keep your A/C humming
Insulating a Crawl Space: A Comprehensive Guide
A crawl space must be adequately insulated to reap the temperature-regulating benefits. Read on to learn how to insulate your crawl space.
In-line Ventilation System
A monster ventilation system helps keep things cooking.
Improving Attic Ventilation
Installing soffit vents is step one in increasing the level of ventilation in your attic
Choosing and Installing Radiant Floor Heating Systems
Looking for radiant floor heat to warm your feet this winter? We'll walk you through the different systems and how to install them.
Portable Space Heaters 101
Portable space heaters can warm your bones in a hurry, but how economical — and safe — are they?