Climate Change Forces Plymouth County Homeowners to Elevate HVAC Systems as Flood Zones Expand in 2025

Plymouth County, Massachusetts, is facing an unprecedented challenge as over 400,000 Massachusetts residents currently live in a 100-year flood zone, which means more than a 1 in 4 chance of a flood during a 30-year mortgage period. With climate change, this is likely to occur more frequently. The combination of rising sea levels, increased precipitation, and more severe coastal storms is forcing homeowners across the county to rethink how they protect their most essential home systems—particularly their HVAC equipment.

New Massachusetts Building Codes Demand Elevated Installation Standards

The Massachusetts Building Code has implemented strict new requirements for HVAC equipment in flood-prone areas. For structures located in flood hazard areas, mechanical systems, equipment and appliances shall be located at or above the elevation required by Section 1612 of the International Building Code for utilities and attendant equipment. This means that traditional ground-level installations of air conditioning units, heat pumps, and other HVAC components are no longer compliant in designated flood zones.

Massachusetts requires one foot of freeboard in AE zones and two feet of freeboard in VE zones. This additional elevation beyond the base flood elevation provides crucial protection against the increasing severity of flood events. HVAC equipment installed outside the home should be elevated to at least 1 foot above the base flood elevation (BFE), similar to the requirement for living areas of newly constructed homes.

The Cost of Inaction: Why Elevation Matters

The financial implications of failing to protect HVAC systems from flooding are severe. Floodwaters are likely to completely destroy the electrical components of the outdoor HVAC equipment. If the equipment is submerged for even a brief amount of time, the electrical equipment could short circuit and the condenser could fill with sand or silt. The condenser coil and compressor are often the most expensive components to replace.

For Plymouth County residents, this reality has become increasingly common. Projected increases in precipitation levels may exceed the capacity of existing infrastructure, such as drainage systems, bridges, culverts, and sewers, to divert water. Flooding can result in exposure to contaminated flood water, debris and physical hazards such as downed wires, loss of electricity and/or heat, unsafe food and drinking water, and mold growth.

Practical Solutions for Homeowners

Fortunately, there are proven methods to protect HVAC systems from flood damage. In locations subject to flooding, there are three ways to protect exterior service equipment: elevate it, relocate it, or protect it in place. Equipment that is typically placed on the ground (e.g., the outdoor unit for air conditioners and heat pumps) can be raised above the flood elevation on pedestals or platforms.

The elevation process requires careful engineering and professional installation. Any large equipment elevated on platforms or pedestals, both inside and outside your home, may be more vulnerable to wind and earthquake damage and may require additional bracing or anchorage. A design professional must determine the expected wind and earthquake forces at the site and account for them in the elevated platform design.

Local Expertise Makes the Difference

When facing these complex requirements, Plymouth County residents need experienced professionals who understand both the technical challenges and local conditions. This is where working with a trusted hvac contractor plymouth county becomes essential. Serving Plymouth County, MA, since 2001, we emphasize family and community values. Our Home Comfort Advisors offer personalized service, and our fully stocked trucks handle most repairs on the spot, reducing downtime.

Dempsey Energy has built its reputation on understanding the unique challenges facing Massachusetts homeowners. For over 30 years, families across Massachusetts have trusted us to keep their homes running efficiently and comfortably. With fast, same-day repairs, fully stocked trucks, and 24/7 emergency services, we’re here when you need us most—ensuring your home stays safe, comfortable, and stress-free.

Planning for the Future

The climate challenges facing Plymouth County are not temporary. While freeboard provides an important margin of safety to protect against increasing precipitation and rising seas, there are notable limitations to relying on the building code for protection against flooding. Nearly 70% of homes in Massachusetts were built before 1980. This means many existing homes were constructed before current flood protection requirements existed.

Smart homeowners are taking proactive steps now rather than waiting for the next major storm. Hull and Winthrop allow encroachment into setbacks to facilitate elevation of utilities including heating units, water heater and hot water storage, electrical panel, washer and dryer. These regulatory changes demonstrate that communities are recognizing the critical importance of protecting essential home systems.

The Bottom Line

As climate change continues to intensify flooding risks across Plymouth County, elevated HVAC installation is no longer optional—it’s essential. The combination of updated building codes, increasing flood frequency, and the high cost of equipment replacement makes elevation a smart investment for any homeowner in a flood-prone area.

Our dedication to family values, community service, and experienced technicians makes us a top contractor. Yes, we provide free estimates to help you make informed decisions about your HVAC needs. We offer 24/7 emergency services and aim to respond promptly to your needs. Don’t wait until the next storm to protect your home’s comfort systems—the time to act is now.