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How to Install a Smart Thermostat

This Old House plumbing and heating expert Richard Trethewey shows a homeowner how to install and operate an energy-saving smart thermostat

S20 E16, Kevin O’Connor, Ross Trethewey, and Richard Trethewey discuss ways to save on heating costs
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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.

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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.

People carrying a wood stove insert to install it into a fireplace.
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How to Install a Wood Stove Fireplace Insert

Install a wood stove insert to increase efficiency and heat output from your fireplace.

People installing new combination boiler in a basement.
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How to Install a Combination Boiler and Hot Water Heater

Replace two devices, your water heater and boiler, with a single combi boiler unit that’s more efficient and compact.

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Serviceable Plumbing and HVAC Installations | Pro2Pro Premiere

Watch as Richard Trethewey and John Deforge of SG Harold Plumbing and Heating discuss the challenges that service technicians face on the job.

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How to Create a House HVAC Plan

Richard Trethewey demonstrates heat loss and gain to design a balanced HVAC system.

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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

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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

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How to Diagnose a Frosty Air Conditioner

Ask This Old House plumbing and heating expert Richard Trethewey discusses the possible causes and solutions for a frozen air conditioner.

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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

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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

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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.

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Ask This Old House: Richard Trethewey’s Greatest Hits

Over the years, This Old House plumbing and heating expert Richard Trethewey has helped hundreds of homeowners reduce their energy consumption and slash their monthly utility bills

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How Thermostat Setbacks Save Money

This Old House plumbing and heating expert Richard Trethewey explains how adjusting the thermostat can reduce energy consumption and save you money

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How to Seal Leaky Ductwork

Ask This Old House plumbing and heating expert Richard Trethewey shows an innovative new way to seal ducts from the inside

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How to Install a Through-the-Wall Exhaust Fan

Scott Caron, master electrician for Ask This Old House, helps a homeowner put in an exhaust fan to rid her kitchen of smelly cooking odors

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How to Install DIY Radiant Floor Heating

Use a specialized foam panel called Bekotec to lock the PEX tubing in place, cover it with a sand-and-cement mix, and tile away

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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

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How to Repair a Frozen Air Conditioner

This Old House plumbing and heating expert Richard Trethewey shows how to prevent ice buildup from shutting down an air-conditioning system

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How to Diagnose Leaks in a Steam Boiler

Ask This Old House plumbing and heating expert Richard Trethewey helps locate the leak on a steam boiler that is losing water

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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 Heat a Swimming Pool with an Air Conditioner

This Old House plumbing and heating expert Richard Trethewey installs a device that will heat a pool with the heat produced by an air conditioner

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How to Install a Wireless Thermostat

This Old House plumbing and heating expert Richard Trethewey helps a homeowner install a wireless thermostat to control one zone of heating

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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