Adding a Heat Recovery Ventilator (HRV) or Energy Recovery Ventilator (ERV) to your existing furnace is a significant home improvement project that can dramatically improve indoor air quality and energy efficiency. This guide will walk you through the process, considerations, and potential challenges.
Understanding HRVs and ERVs
Before diving into the installation process, it's crucial to understand the difference between HRVs and ERVs:
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HRV (Heat Recovery Ventilator): An HRV recovers heat from outgoing exhaust air and transfers it to incoming fresh air. This process reduces the energy needed to heat the incoming air, saving you money on heating costs, especially in colder climates.
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ERV (Energy Recovery Ventilator): An ERV functions similarly to an HRV, but it also recovers moisture. This makes it particularly beneficial in drier climates where humidity control is important.
Why Add an HRV/ERV to Your Existing Furnace?
Many homeowners choose to add an HRV/ERV to their existing furnace for several reasons:
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Improved Indoor Air Quality: HRVs/ERVs continuously exchange stale indoor air with fresh outdoor air, reducing the concentration of pollutants like dust mites, pet dander, mold spores, and volatile organic compounds (VOCs). This is especially beneficial for allergy sufferers and those with respiratory problems.
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Reduced Energy Costs: By recovering heat or energy from exhaust air, HRVs/ERVs significantly reduce the amount of energy required to heat or cool your home.
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Increased Comfort: Proper ventilation prevents the build-up of moisture, reducing the risk of mold growth and improving overall comfort.
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Enhanced Home Value: Installing an HRV/ERV is a valuable home improvement that can increase your property's value.
The Installation Process: A Step-by-Step Overview
Adding an HRV/ERV to an existing furnace is a complex project best left to qualified HVAC professionals. Attempting a DIY installation can lead to safety hazards and potentially void your warranty. However, understanding the general process can help you communicate effectively with contractors:
1. System Sizing and Selection:
The first step involves determining the appropriate size and type of HRV/ERV for your home. This depends on factors such as the square footage of your house, the number of occupants, and your climate. A professional will conduct a thorough assessment to make the best recommendation.
2. Location and Ductwork:
The HRV/ERV unit needs to be strategically located, typically in a basement, attic, or utility closet, with easy access to ductwork. New ductwork will likely need to be installed to connect the unit to both the intake and exhaust vents.
3. Electrical Connections:
The HRV/ERV unit requires a dedicated electrical circuit. A qualified electrician should ensure the proper wiring and safety measures are in place.
4. Ventilation System Integration:
The unit needs to be properly integrated into your existing ventilation system. This might involve modifications to existing ductwork or the addition of new ducts.
5. Testing and Commissioning:
Once installed, the system will undergo rigorous testing to ensure proper airflow, efficiency, and safety.
Potential Challenges and Considerations
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Cost: The cost of adding an HRV/ERV can be significant, including the unit itself, installation labor, and any necessary ductwork modifications.
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Space Requirements: The unit requires space for installation and sufficient room for ductwork.
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Noise Levels: Some HRV/ERV units can produce noticeable noise, so it's important to consider noise levels during the selection process.
Choosing the Right Contractor
Finding a reputable and experienced HVAC contractor is crucial for a successful installation. Look for contractors with proven experience in installing HRVs/ERVs and check online reviews and testimonials. Request multiple quotes and compare pricing and services before making a decision.
By carefully considering these factors and engaging a qualified professional, adding an HRV/ERV to your existing furnace can be a rewarding investment that improves your home's comfort, energy efficiency, and indoor air quality. Remember, always prioritize safety and professionalism when undertaking such a project.
