Uncover The Truth: Does A Built-in Microwave Really Need Venting?

When it comes to installing a built-in microwave, one of the most important considerations is whether or not it needs to be vented. The answer to this question depends on several factors, including the type of microwave, the location of the installation, and local building codes. In this comprehensive guide, we will explore the ins and outs of microwave ventilation, providing you with the knowledge you need to make an informed decision.

Types of Built-In Microwaves

There are two main types of built-in microwaves: over-the-range microwaves and cabinet-mounted microwaves.

Over-the-Range Microwaves

Over-the-range microwaves are designed to be installed above the stovetop, typically in a range hood. These microwaves usually require ventilation to remove steam, smoke, and odors from the cooking area.

Cabinet-Mounted Microwaves

Cabinet-mounted microwaves are installed inside a kitchen cabinet, either above or below the counter. Some cabinet-mounted microwaves have built-in ventilation systems, while others do not.

Ventilation Requirements for Over-the-Range Microwaves

Most over-the-range microwaves require ventilation to meet safety standards. The ventilation system helps to remove harmful gases, smoke, and steam from the cooking area.

Types of Ventilation Systems

There are two main types of ventilation systems for over-the-range microwaves:

• Ducted ventilation: This type of system vents the air directly to the outside of the house through a duct.
• Recirculating ventilation: This type of system filters the air and recirculates it back into the kitchen.

CFM Rating

The CFM (cubic feet per minute) rating of a ventilation system indicates how much air it can move. A higher CFM rating means that the system can remove more air from the cooking area.

Ventilation Requirements for Cabinet-Mounted Microwaves

Not all cabinet-mounted microwaves require ventilation. However, some models may have built-in ventilation systems that are designed to remove steam and odors from the cooking area.

Types of Ventilation Systems

The ventilation systems for cabinet-mounted microwaves are typically recirculating systems. These systems filter the air and recirculate it back into the kitchen.

CFM Rating

The CFM rating of a ventilation system for a cabinet-mounted microwave is typically lower than that of a ventilation system for an over-the-range microwave.

Local Building Codes

In some areas, local building codes may require that all built-in microwaves be vented. It is important to check with your local building department to determine the specific requirements in your area.

Factors to Consider When Choosing a Ventilation System

When choosing a ventilation system for your built-in microwave, there are several factors to consider:

• Type of microwave: Over-the-range microwaves typically require ventilation, while cabinet-mounted microwaves may or may not.
• Location of the installation: The location of the microwave will determine the type of ventilation system that is needed.
• Local building codes: Local building codes may require that all built-in microwaves be vented.
• CFM rating: The CFM rating of the ventilation system will determine how much air it can move.

Installation of a Vented Microwave

If you are installing a vented microwave, it is important to follow the manufacturer’s instructions carefully. The installation process will vary depending on the type of microwave and the type of ventilation system.

Summary

The question of whether or not a built-in microwave has to be vented is not always straightforward. The answer depends on several factors, including the type of microwave, the location of the installation, and local building codes. By understanding the different types of microwaves and ventilation systems, you can make an informed decision about the best option for your kitchen.

Questions We Hear a Lot

Q: Do all built-in microwaves require ventilation?

A: No, not all built-in microwaves require ventilation. Cabinet-mounted microwaves may not require ventilation, but some models have built-in ventilation systems.

Q: What is the difference between ducted and recirculating ventilation systems?

A: Ducted ventilation systems vent the air directly to the outside of the house through a duct, while recirculating ventilation systems filter the air and recirculate it back into the kitchen.

Q: What is the CFM rating of a ventilation system?

A: The CFM (cubic feet per minute) rating of a ventilation system indicates how much air it can move. A higher CFM rating means that the system can remove more air from the cooking area.