As of January 1, 2025, major changes to HVAC refrigerant regulations are now officially in effect, and they’re already impacting homeowners across the country. These new rules phase out high-global warming potential (GWP) refrigerants like R-410A in favor of more climate-friendly alternatives such as R-454B and R-32.

At Top Flight Heating & Air, we want homeowners in Delaware and surrounding areas to feel informed – not blindsided – about what these updates mean for your current HVAC system, your repair costs, and any upcoming replacements.

Why Did Refrigerant Rules Change in 2025?

The Environmental Protection Agency (EPA), as part of the American Innovation Manufacturing (AIM) Act, is working to reduce the use of hydrofluorocarbons (HFCs) – the class of refrigerants responsible for significant greenhouse gas emissions.

Refrigerants like R-410A have a high GWP, meaning they trap heat in the atmosphere if released during leaks or improper disposal. New refrigerants like R-454B and R-32 offer the same cooling performance with far less environmental impact – up to 75% lower GWP in some cases.

These changes also align with global efforts to slow climate change and improve HVAC system efficiency.

What Does This Mean for Homeowners?

Your Current HVAC System Will Still Work

If your system runs on R-410A, you don’t need to panic. You can still use it, and certified technicians like ours can continue servicing it for the foreseeable future.

Repairs May Become More Expensive

Because R-410A is being phased out, it will become harder to source and more expensive over time. If your system needs frequent recharging or major refrigerant-based repairs, the cost will likely rise. For older systems nearing the 10-15 year mark, replacement may be more cost-effective long-term.

All New Systems Use Low-GWP Refrigerants

Any HVAC system manufactured and sold in 2025 or later must comply with the new refrigerant guidelines. That means if you’re installing a new unit this year, it will likely come with R-454B or R-32, along with updated components designed to handle these refrigerants safely and effectively.

Should You Upgrade Your HVAC System?

If your system is in good shape, there’s no need to rush. But if it’s older, inefficient, or requires frequent repairs, now is a smart time to plan ahead. Upgrading to a modern system ensures:

• Compliance with current EPA standards
• Better energy efficiency and lower utility bills
• Access to replacement parts and refrigerants for years to come

Not sure if you’re due for an upgrade? Our team can perform a full system evaluation and help you weigh your options.

What Homeowners Should Do Now

If you haven’t already, here’s how to stay ahead of the refrigerant transition:

1. Schedule an HVAC inspection to assess the age, condition, and refrigeration type of your current system.
2. Talk to a certified technician about whether a refrigerant retrofit or full system upgrade makes more financial and environmental sense for your household.
3. Be aware of installation requirements. New refrigerants are mildly flammable and require systems designed with safety enhancements – so don’t just trust anyone with the install.

Top Flight Heating & Air: Here to Guide You Through the Change

The new refrigerant standard may seem like a big shift, but with the right guidance, you won’t miss a beat. At Top Flight, we’re here to help you make informed decisions, whether you need a minor AC repair or a full system upgrade.

We’ll walk you through your options, explain costs clearly, and ensure your home stays cool and compliant for years to come.

Call (302) 329-8003 to schedule your inspection or talk to a tech about your HVAC options under the 2025 refrigerant rules. 

If you’ve noticed musty odors, poor airflow, or increased allergy symptoms, your HVAC system might have biological growth.

Biological growth thrives in warm, humid environments, making air conditioning systems and ductwork the perfect breeding ground – especially in coastal areas.

At Top Flight Heating & Air, we know how dangerous buildup can be for your home, health, and HVAC system efficiency. Here’s how to prevent biological growth in your HVAC system and keep your indoor air fresh.

Why Does Biological Growth Occur in HVAC Systems?

Moisture needs three things to grow:

• Moisture – Humid air, condensation, or faulty drainage can leave water sitting inside your system.
• Warmth – HVAC systems maintain ideal temperatures for biological growth.
• Organic Matter – Dust, dirt, and clogged air filters provide the nutrients biological growth needs to thrive.

Common causes of biological growth in HVAC systems:

• Poor Ventilation – Traps humidity inside your system.
• Dirty Filters – Allow dust and moisture to accumulate.
• Faulty Drainage – Standing water encourages biological growth.
• Coastal Humidity – High moisture levels make biological growth prevention even harder.

Signs of Biological Growth in Your HVAC System

If you notice any of these warning signs, contact an HVAC technician immediately:

• Musty or earthy odors when your system runs.
• Visible biological growth on vents, filters, or coils.
• Increased allergy symptoms or respiratory issues.
• Poor airflow or reduced system efficiency.
• Excessive condensation around your unit or ducts.

Ignoring it allows it to spread through your entire system, impacting air quality, HVAC performance, and your health.

How to Prevent Biological Growth in Your HVAC System

1. Change Filters Regularly

Replace your air filters every 1-3 months to prevent buildup. A dirty filter traps moisture and dust, creating the perfect conditions for biological growth.

2. Improve Ventilation

Use exhaust fans, open cents, and avoid blocking airflow with furniture. Proper air circulation reduces humidity inside your system.

3. Maintain Drainage Lines

Your HVAC’s drainage system removes condensation. Ensure drain lines are clear and working properly to prevent standing water.

4. Control Humidity Levels

Keep humidity levels between 30-50% using a whole-home humidifier. This helps eliminate excess moisture that feeds biological growth.

5. Clean Coils & Ductwork

Schedule regular HVAC maintenance to prevent biological growth and improve system efficiency. Dust and moisture build up on evaporator coils and inside ducts.

6. Upgrade Insulation

Poor insulation allows moisture to condense in your ducts, providing a breeding ground for biological growth. Sealing and insulating your ductwork reduces this risk.

Why Coastal Climates Make Biological Growth Prevention Harder

If you live in a coastal area or experience high humidity, biological growth is an even bigger concern. Damp air combined with poor ventilation can create the perfect conditioning for biological growth to spread throughout your home.

Pro Tip: Investing in a ductless mini-split maintenance and dehumidifier installation can help you control moisture levels and prevent problems before they start.

Schedule Biological Growth Prevention Services with Top Flight Heating & Air

If you suspect biological growth in your HVAC system or want to improve indoor air quality we’re here to help. At Top Flight, we offer professional HVAC cleaning, dehumidifier installation, and maintenance to keep your system clean and free of biological growth.

Call (302) 329-8003 to schedule an HVAC inspection and start breathing better, today!