Our Services

Reliable Residential & Commercial HVAC Solutions

At DHN Building Maintenance LLC, we provide professional heating, cooling, refrigeration, and facility HVAC services for homeowners and businesses throughout Franklin County and Surrounding Areas. Whether you need emergency repairs, new system installation, or preventative maintenance, our experienced technicians deliver dependable solutions designed to keep your property comfortable year-round.

Rooftop HVAC unit next to a vent, a worker in safety gear, and a cloudy sky.
Plumber working on a furnace in a basement setting; concrete wall, pipes overhead.

Heating Services

Ohio winters demand a dependable heating system, and DHN Building Maintenance LLC is here to keep your home or business warm and comfortable. We provide expert furnace repair, heat pump service and seasonal maintenance to ensure reliable performance when temperatures drop. Whether you need a quick repair or a full system replacement, our experienced HVAC technicians deliver efficient, cost-effective heating solutions built to last.

HVAC unit on a white rooftop. Gray metal box with a large grid, on a raised white base. Yellow line nearby.

Air Conditioning Services

When summer heat hits Franklin County and Surrounding Areas, you need an air conditioning system you can count on. Our professional AC services include fast repairs, complete system installations, energy-efficient upgrades, and preventative maintenance. We work with all major brands and focus on maximizing cooling performance, lowering energy costs, and extending the life of your equipment.

An industrial refrigeration unit mounted on a silver wall displays temperature; ESP label visible.

Refrigeration Services

Reliable refrigeration is essential for commercial operations and specialty residential applications. DHN Building Maintenance LLC provides expert repair, maintenance, and system diagnostics for commercial refrigeration units, walk-in coolers, and freezers. We help businesses maintain safe storage temperatures, prevent product loss, and ensure equipment runs efficiently year-round.

Large, metallic HVAC ductwork installation in an industrial interior.

Indoor Air Quality & Ventilation

Clean, healthy indoor air plays a critical role in overall comfort, safety, and well-being. At DHN Building Maintenance LLC, we specialize in the installation of new ductwork and the replacement of old or damaged ducts and vents to improve airflow and system performance. Properly designed and installed duct systems help maximize HVAC efficiency, maintain consistent temperatures, and support better indoor air quality.

Workers installing rooftop HVAC unit. Unit suspended by ropes, men on roof directing placement.

Commercial HVAC Services

Commercial properties require powerful, dependable HVAC systems to support daily operations. We specialize in installation, repair, and maintenance of rooftop units, large-scale heating and cooling systems, and facility HVAC equipment. Our team understands the importance of minimizing downtime and delivering fast, professional service that keeps your business running smoothly.

White pickup truck parked outside a Taco Bell. Truck has black wheels and a trailer hitched to the back.

24/7 Emergency HVAC Services

HVAC emergencies can happen at any time — and when they do, you need immediate assistance. DHN Building Maintenance LLC offers responsive emergency heating and cooling services to restore comfort quickly and safely. Whether your furnace fails in the middle of winter or your AC stops working during extreme heat, our team is ready to provide prompt, reliable repairs when you need them most.