The answer to the question of, “Should I insulate the ductwork in my basement?” is…. Maybe. While insulating basement ductwork will, in fact, reduce energy loss from your ducts, thereby lowering the time your system has to run to properly cool or heat your house, it will also tend to make your basement cooler.

How do you insulate a square metal ductwork?

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Quote from Youtube video: The second method is to double wrap the duct in a crisscross candy-cane fashion. An option of using reflectix.

Does duct need to be insulated?

Without proper ductwork insulation, you could be losing 10-30% of the energy used to heat or cool your home. A good level of ductwork insulation will prevent not only energy wastage, but also leaks, temperature drops, and condensation buildup.

How do I stop my metal ductwork from sweating?

In case you have metal ducts, make sure they are appropriately wrapped with fiberglass insulation. Try to reduce the humidity level in the air near the air ducts. You can go for a dehumidifier if that helps to reduce the condensation. Unblock any ducts that are restricting airflow and have them cleaned regularly.

How do you wrap metal ductwork?

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Quote from Youtube video: Line if i just got one 5 foot section of duct to wrap though i'm just going to go ahead and show you how to wrap. It so set the pipe in the middle of the roll. Make sure they're loaded with staples.

Does bubble wrap duct insulation work?

Senior editor Martin Holladay was next, picking up the “snake oil” theme and going on to say any claim that bubble wrap is the equivalent of R-6 duct insulation is a “scam and a fraud.” He specifically cited a company called Reflectix, which makes a 5/16-inch thick material consisting of bubble-wrap plastic between …

Should exposed ductwork be insulated?

The ducts are exposed to the same cold, heat and humidity that exist on the outside. Insulating them is essential in colder climates, optional in milder ones and necessary in humid climates to prevent condensation.

Is insulated ducting better?

This, of course, is a good thing! Duct insulation keeps air that’s supposed to be cool cool and air that’s supposed to be warm warm. If your ducts aren’t insulated, you’re probably paying way more than you should to cool and heat your home.

How do you insulate a vent duct?

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Quote from Youtube video: Look for aluminum backed tapes with the underwriter laboratories logo duct mastic is the preferred material for sealing ductwork seams. And joints especially irregular or jagged edges.

What type of insulation do you use to wrap ductwork?

fiberglass insulation

When insulating HVAC ductwork, use a foil, faced fiberglass insulation with an R-6 or higher R-value. Use the type of metallic foil duct tape recommended by the insulation manufacturer to seal and hold the insulation in place.

Is Reflectix good for ductwork?

Utilizing Reflectix® to enhance the efficiency of your existing duct system is one of the “easiest to install” products you can select. There are no fibers or dust contained in the product, thus no need for respirators or protective garments.

How do you use Reflectix on ductwork?

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Quote from Youtube video: And disappear into the exterior wall is you want to wrap it so with some sort of insulation. Now the that's easier said than done if you have a ductwork running through a 2×4 wall like I have here

Does Reflectix have an R value?

Reflectix’s stated R-14 R-values for exterior walls are good only if the Reflectix is paired up with R-13 fiberglass batt insulation. If you do not provide air space, Reflectix has less insulating value.

What is the R value of flex duct?

For example, a six-inch diameter, nominal R-8 flex duct has an actual R-value of only 5.62 not counting surface films. With the film resistances the total R-value of 6.45 is 19% less than the nominal value. For R-11 ducts (six-inch diameter) the R-value with films is only 7.81, 29% less than the nominal value.

Should I replace metal duct with flexible?

Flex ducts are better for existing trunk-and-branch heating and cooling systems. This is because they’re more versatile and flexible. Metal ducts are more rigid due to the nature of steel, making them ideal to build an entire HVAC system.

Does Flex duct reduce airflow?

If you’ve ever seen kinked or sagging flex duct and wondered whether that was a problem, you were onto something! Since flex duct, by definition, is flexible, it often flexes in ways we don’t want it to. The result is poor airflow and ineffective HVAC systems.

How thick should duct insulation be?

In commercial air conditioning, our minimum duct thickness is always 1″. If the surrounding temperature is higher, we usually use 2″ thick fiberglass insulations.

Temperature Difference Recommended Thickness
40°F (22.2°C) 1-1/2″(38mm)
45°F (25.0°C) 1-1/2″ (38mm)
50°F (27.8°C) 2″ (50mm)

Why do you insulate ductwork?

Thermal insulation is a great way to minimize energy loss in ducts. Heat loss through the duct walls is an expected and inevitable drain on the system. Effective thermal insulation of the ductwork reduces this heat loss and helps to minimize energy usage.

What R value should duct insulation be?

“Supply and return air ducts and plenums shall be insulated with a minimum of R-6 insulation where located in unconditioned spaces and where located outside the building with a minimum of R-8 insulation in climate zones 1-4 and a minimum of R-12 insulation in climate zones 5-8.