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August 27.2025

2 Minutes Read

Is Placing Your HVAC Outdoor Unit Under the House a Smart Move?

HVAC outdoor unit placement advice cartoon with speech bubble.

Understanding Outdoor Unit Placement for HVAC Systems

When considering the installation of heating and cooling systems, one of the most important decisions a homeowner can make is the placement of the outdoor unit. Specifically, the question of whether to place the outdoor unit for a heat pump (HP) or central air conditioning (CAC) system under the house arises frequently. Based on insights tailored to coastal living environments, this article delves into the implications of such a placement.

Why Elevation Matters

In regions like Houston, where humidity and salt in the air can be particularly harsh, elevating outdoor units is critical. While placing these units under a house might seem appealing due to the protection from potential storm damage or debris, multiple factors make this a less-than-ideal choice. One of the primary concerns is airflow; even with adequate clearance, airflow can stagnate in enclosed spaces, reducing efficiency.

The Impact of Coastal Weather Conditions

Ed Janowiak, an acknowledged HVAC expert, highlights the downside of keeping outdoor units under your house. The moisture from humidity combined with the salty air can accelerate the decay of these units compared to those placed in more open environments benefiting from natural rinsing from rain. Homeowners in coastal areas often notice that outdoor units left exposed have longer lifespans due to better airflow and being rinsed by rain. This insight is crucial for homeowners in Houston, where local weather can closely mimic coastal conditions.

Effective Solutions for Homeowners

So, what should homeowners in Houston consider for their outdoor units? Here are a few tips:

Position Away from the Home: Ensure units are placed away from the house structure to promote better airflow and reduce potential moisture buildup.
Invest in Protection: Utilize weather-resistant covers designed to allow complete airflow while protecting the unit from direct rain and debris.
Regular Maintenance: Schedule routine checks and cleanings to mitigate damage from dust, debris, and potential rust issues over time.

The Bottom Line: Make Informed Choices

Installing your outdoor unit in an area where it can breathe is essential for its longevity and efficiency. While placing it under the house might seem protective at first, the realities of airflow and corrosion reveal this to be a less favorable option.

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Is Placing Your HVAC Outdoor Unit Under the House a Smart Move?

Understanding Outdoor Unit Placement for HVAC Systems

Why Elevation Matters

The Impact of Coastal Weather Conditions

Effective Solutions for Homeowners

The Bottom Line: Make Informed Choices

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