What Are Microclimates in Your Home?

Have you ever wondered why certain areas of your home feel different? It might feel cooler in a specific corner or more humid in the basement. The answer to these discrepancies is in home microclimates.

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Various areas in your home can have distinct climate features that differ from how it feels in the rest of your space. These variances can impact the comfort level of your home and how your HVAC unit performs. This article explains what indoor microclimates are, how to identify them and the impact they could have on your HVAC setup.

What Is a Microclimate in Your House?

Microclimates in your home are small zones that have different temperatures, humidity levels or air circulation patterns from other areas. These zones can be an entire room, such as a bathroom, or a corner or other space in a bigger room.

Various factors contribute to these climate differences, including:

• Exposure to sunlight

• Poor airflow

• Lack of insulation

• Proximity to heating or cooling sources, such as furnace or AC vents

• Poorly sealed windows and doors

• Layout and furniture placement in a room

• Use of appliances or electronics in the area

• Performance of your HVAC system

What Are the Potential Microclimates in My House?

Every home has its own unique microclimates based on a variety of factors. However, some areas are more prone to developing microclimates than others, such as:

• Bathrooms or laundry rooms. Humidity levels tend to be higher in bathrooms and laundry rooms due to steam produced by the shower, sink and washing machine.

• Kitchens. Kitchens can also have higher humidity levels when you're running the sink or dishwasher. Additionally, using the oven and other kitchen appliances can impact the temperature in the space.

• Basements. Basements located below ground level tend to absorb more moisture and receive minimal sunlight. This can result in higher humidity levels and may require the use of a dehumidifier.

• Attics. Many attics have poor ventilation, which results in improper airflow. It’s also common for these spaces to lack a cooling source. This variable, along with the fact that heat rises, can result in high temperatures during the summer.

• Near windows. Direct sunlight coming through windows can increase the temperature in a space, creating an oddly warm microclimate in an otherwise cold house. This is especially true for south-facing windows. Also, poorly sealed windows can let in moisture or cold or hot air, depending on the season, impacting temperature and humidity levels.

• Corners. You may detect a noticeable temperature shift in certain corners of your home. This is often due to poor air circulation or cold walls from lack of insulation.

• Closets. Poor air circulation in closets can result in temperature shifts or give the area a musky odor due to stagnant air flow.

To identify various home microclimates, you can use a thermometer to check temperatures and a hygrometer to determine the humidity levels in various spaces.

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How Microclimates Should Inform Your HVAC Setup

Understanding and identifying microclimates in your home can prevent uneven home heating and cooling by improving your HVAC’s performance. There are several ways you can use this information to improve your HVAC’s setup and provide greater home climate control, prevent uneven home heating and cooling and reduce energy costs.

• Determining the size of HVAC. Understanding your home temperature zones can help you determine the size and type of HVAC you need.

• Using a smart thermometer. A smart thermometer using strategically placed sensors can help regulate the temperature in different microclimates in your home.

• Investing in a zoned HVAC system. A zoned HVAC unit lets you control features such as temperature and airflow in various home microclimates to ensure whole-house comfort.

• Installing a mini-split. Installing a mini-split in an area of the home that’s not cooling properly could be an alternative to a zoned HVAC system.

• Adjusting duct layout. You can design or modify your home’s duct layout to improve airflow and provide even distribution.

Contact a Professional

The best way to maximize your HVAC’s performance and develop thermal comfort zones in your home is to contact a professional HVAC technician. An HVAC specialist can identify various microclimates in your home and use this information to improve your HVAC system’s setup.