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A boiler system can be set up with primary and secondary loops to supply hot water for multiple uses

A boiler system can be set up with primary and secondary loops to supply hot water for multiple uses
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A Category I induced draft boiler uses an induced draft fan to pull air through the combustion chamber and to the flue

A Category I induced draft boiler uses an induced draft fan to pull air through the combustion chamber and to the flue
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A direct-vent sealed-combustion fireplace takes its combustion air directly from outside through a dedicated air inlet and vents combustion products directly outside

A direct-vent sealed-combustion fireplace takes its combustion air directly from outside through a dedicated air inlet and vents combustion products directly outside
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A direct-vent sealed-combustion furnace has dedicated pipes for combustion air and exhaust

A direct-vent sealed-combustion furnace has dedicated pipes for combustion air and exhaust
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A portable CO monitor is used to test for ambient CO near a ventless combustion fireplace

A portable CO monitor is used to test for ambient CO near a ventless combustion fireplace
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A Quick Guide on How to Select a New Stove for Home Heat

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A ventless gas fireplace has no chimney

A ventless gas fireplace has no chimney
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Average number of tornadoes per year across the United States

Average number of tornadoes per year across the United States
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Baseboard radiators are one means of distributing hot water heat

Baseboard radiators are one means of distributing hot water heat
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Basic components of a gas tankless water heater include a high-powered burner, fan, and heat exchanger; condensing gas water heaters also have a secondary heat exchanger and a piped air intake to the sealed combustion chamber

Basic components of a gas tankless water heater include a high-powered burner, fan, and heat exchanger; condensing gas water heaters also have a secondary heat exchanger and a piped air intake to the sealed combustion chamber
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Be Hurricane Ready: Secure Soffits

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Because flue temperatures are cool, intake and exhaust ducts on a Category 4 direct-vent sealed-combustion condensing furnace can be made of PVC

Because flue temperatures are cool, intake and exhaust ducts on a Category 4 direct-vent sealed-combustion condensing furnace can be made of PVC
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Boilers can provide zoned heating with parallel piping loops

Boilers can provide zoned heating with parallel piping loops
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Building A Safer House

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Carbon monoxide alarm

Carbon monoxide alarm
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Category III oil-fired, sealed-combustion boiler configured as a direct-vented appliance that draws its combustion air from outside

Category III oil-fired, sealed-combustion boiler configured as a direct-vented appliance that draws its combustion air from outside
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Category III oil-fired, sealed-combustion boiler with the burner assembly cover removed

Category III oil-fired, sealed-combustion boiler with the burner assembly cover removed
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Category IV oil-fired condensing boiler with direct vent pipe

Category IV oil-fired condensing boiler with direct vent pipe
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CCHRC: Combustion Safety Test

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Combustion safety testing using a smoke pen

Combustion safety testing using a smoke pen
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Combustion Safety Webinar

Combustion Safety Webinar
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Composition shingle roofing system showing sheathing and hot-mopped underlayment

Composition shingle roofing system showing sheathing and hot-mopped underlayment
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Condensing boilers have primary and secondary heat exchangers

Condensing boilers have primary and secondary heat exchangers
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Cracks and Gaps