DIY Builds
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What can I use as a vent cover?

The most common types of metal used for vent covers are cast iron, cast aluminum, brass, and steel. The latter three are best for high humidity areas such as bathrooms due to their rust-resistant qualities.

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Vent Cover Basics

First, before we get into why wood is a great choice for your own vent covers, let’s—ahem—cover…some vent basics and commonly asked vent-related questions.

What is the difference between a vent and a register?

First, the vent is the actual hole in your wall, ceiling, or floor that needs a cover. A standard vent cover will fit within the dimensions of the vent hole and prevent most things from entering the vent, protecting the HVAC system while still allowing air to flow into the room for heating and/or cooling purposes. This type of vent cover is also often referred to as a vent grille. A register is similar to a vent cover, but it has the added functionality of being able to direct air or even close it off from a room by moving a damper attached to the register.

What is the difference between an air supply and air return?

The difference between an air supply and air return is right there in the naming of the terms: an air supply vent supplies air to a room, whereas an air return vent circulates air back into the HVAC system. Most rooms in any modern home will have at least one air supply vent, but it is only necessary to have a few larger and well-placed returns throughout the home.

What are the different types of vents?

The different types of vents are actually the ones discussed in the previous question—a vent is either there to supply air or return it to the system. So the two types of vents are return and supply vents. Depending on the type of system and size of home you have, both types of vents can be found on the floors, walls, or ceilings of a home.

Are vent covers necessary?

As alluded to above, vent covers are absolutely necessary for any home. For one, they work to protect your HVAC system from large debris. Two, they increase your heating and cooling system’s efficiency and can lower your monthly bill when used wisely. That means closing or covering vents in rooms that aren’t often used, directing the air to other spaces in your home which will mean that, three, your vent covers help to maximize your family’s comfort. And number four? The right, often custom, vent covers can increase your home’s value, both monetarily and aesthetically. But we’ll get more into that soon.

LEARN MORE: Common Air Return Vent Questions

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How long should the vent pipe stick out from the roof?

Each vent pipe or stack shall extend through its flashing and shall terminate vertically not less than 12 inches (305 mm) above the roof.

revisor.mn.gov - 4714.0906 - MN Rules Part

4714.0906 VENT TERMINATION.

§ Subpart 1. Section 906.1. UPC section 906.1 is amended to read as follows: 906.1 Roof Termination. Each vent pipe or stack shall extend through its flashing and shall terminate vertically not less than 12 inches (305 mm) above the roof. § Subp. 2. Section 906.3. UPC section 906.3 is amended to read as follows: 906.3 Use of Roof. Vent pipes shall be extended separately or combined and of full required size, not less than 12 inches (305 mm) above the roof. Flagpoling of vents shall be prohibited except where the roof is used for purposes other than weather protection. Vents within 10 feet (3,048 mm) of a part of the roof that is used for such other purposes shall extend not less than 7 feet (2,134 mm) above the roof and shall be securely stayed.

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