Home Climate: Ductwork


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Working with Round Ducts

Round ductwork comes in preformed but unconnected sections. You can cut it before snapping the edges together or cut it in the round, as shown below. Gloves are a must when cutting, shaping or installing any ductwork.

1. Start the cut by making a slit with a screw driver (see right) then cut the perimeter with aviation snips. Cut through the seam with a hacksaw, as shown here.

2. You can create a male-end by using a specialized crimping tool or a needle-nose pliers with a series of pinches and light twists.

Adding a Takeoff Collar

Heated air from the main furnace supply duct is usually delivered by way of smaller round ducts. Create the opening in the main distribution duct for the takeoff collar, as shown below.

1. Lay out the collar’s size and location. Drive a screwdriver blade inside the area to be cut out and twist it to make room for your snips.

2. Use your left- and right-hand aviation snips to cut the hole. Carefully follow the circle so the collar fits snugly.

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Inline Duct Booster 8'' Inline Duct Booster: J

Inline Duct Booster 8'' Inline Duct Booster: J

• Perfect for boosting air flow in long runs of ducting • Energy efficient and very quiet • Lightweight and easy to install • 1 year warranty • Come completely wired with junction box, strain relief and power cord • Fluted on both ends to receive ducting



6 In. Metalized R6 Insulated Flexible Duct (F6IFD Series)

6 In. Metalized R6 Insulated Flexible Duct (F6IFD Series)

The Master Flow F6IFD Series is UL-approved to create safe, reliable branch lines in HVAC systems. Master Flow insulated duct consists of 4 parts: core, vapor barrier, helix and insulation. Combined, these features result in strong, long-lasting and efficient flexible duct. Indoor use only.



Filtrete Micro Allergen Reduction Furnace Filter 20 x 20 6 Per Carton

Filtrete Micro Allergen Reduction Furnace Filter 20 x 20 6 Per Carton

Filtrete Micro Allergen Reduction Furnace Filter 20 x 20 6 Per Carton



Filtrete Ultra Allergen Reduction Furnace Filter 20 x 20 6 Per Carton

Filtrete Ultra Allergen Reduction Furnace Filter 20 x 20 6 Per Carton

Filtrete Ultra Allergen Reduction Furnace Filter 20 x 20 6 Per Carton


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EnviroSept Electronic Furnace Filters - Air Conditioner Filters

EnviroSept Electronic Furnace Filters - Air Conditioner Filters

Electronic furnace filters and air conditioner filters by Envirosept are whole house, permanent air filters available in over 30 sizes. FREE SHIPPING



BoAir Furnace and Air Cleaners Filter

BoAir Furnace and Air Cleaners Filter

Furnace filters and electrostatic air filters that are permanent and washable. Many sizes available.



Filtrete Ultra Allergen Reduction Furnace Filter 20 x 25 6 Per Carton

Filtrete Ultra Allergen Reduction Furnace Filter 20 x 25 6 Per Carton

Filtrete Ultra Allergen Reduction Furnace Filter 20 x 25 6 Per Carton



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Duct Accessories

Two specialty items can help solve some tricky forced-air heating problems. A duct booster is an add-on fan that helps deliver extra air to rooms located far from the furnace. Always turn off power before making electrical connections. For difficult-to-reach or unusual connections, use flex duct.


Duct booster. Locate unit as near as possible to the cold room. You can wire it to a manually controlled switch or furnace’s blower-fan wiring. Shut off power while working.

Flex duct. For short runs of up to 5 ft. (1.5 m) or to connect ductwork in tight spaces, insulated flex duct is the ticket. You can attach it securely with hose clamps.
Which Filter?

Smarter Shopping: Which Filter?

Walk down the aisles of your local home center or hardware store and you’ll find furnace filters ranging in price from under $1 to $40 or more. What’s the difference?

The least expensive woven fiberglass filters screen out some pollen and mold spores but mostly keep dirt and debris from damaging your blower motor.

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Accordion-like pleated filters have a larger surface area, meaning they can capture smaller particles for longer periods of time without impeding the airflow of your furnace.

The more expensive, higher efficiency electrostatic filters can filter out and magnetically attract contaminants, including bacteria, dander, odors and smoke particles. Consider these if you have household members with allergies or asthma.

Many filters carry a minimum efficiency report ing value (MERV) rating, which basically indicates their effectiveness. The higher the M ERV rating, the higher a filter’s effectiveness.

Remember: changing filters isn’t only a heating-season chore. Many blower motors work at a higher speed in air-conditioning mode than in heating mode, which means you should clean or change your filters more often in the summer. A clogged filter will make both your furnace and air conditioner work harder and less efficiently.

Generic Aprilaire/Honeywell Furnace Humidifier Pad

Generic Aprilaire/Honeywell Furnace Humidifier Pad

Generic furnace humidifier pad/filter fits Aprilaire models 350, 360, 560, 560A, 568, 600, 700, 760 and 760A. Honeywell models HE260A, HE260B, HE360A and HE360B. Measures 13 by 10 inches.

Updated: Thursday, January 26, 2017 19:51 PST