Business Details
43 Years
experience
Emergency
services
Your Trusted HVAC Partner in Long Island Since 1983
Established in 1983, DML & S Air Conditioning & Heating has served Nassau and Suffolk Counties as a family-owned HVAC contractor. Our team specializes in residential and commercial heating, cooling, and indoor air quality solutions, prioritizing professional service and customer relationships. With over 30 years of local experience, we focus on maintaining a healthy indoor climate through sales, installation, and repair services. Our technicians are EPA-certified and affiliated with industry leaders like ACCA and Mitsubishi Electric. We offer maintenance contracts to enhance system efficiency and longevity while providing 24/7 emergency service.Our commitment to quality workmanship and affordable pricing has earned us a reputation for reliability. We partner with PSEGLI to offer rebates on energy-efficient systems and hold multiple state licenses for HVAC, electrical, and plumbing work. Our approach combines technical expertise with personalized service to meet diverse client needs. We emphasize transparency, using top brand products and clear communication to ensure customer satisfaction. Our long-standing relationships with satisfied clients reflect our dedication to excellence in every project.
Services
Residential HVAC
Commercial HVAC
Maintenance Contracts
Indoor Air Quality
Ductless Air Conditioning
Water Heater Installation
Humidifier Services
Thermostat Upgrades
Carbon Monoxide Detection
Details
- Year established: 1983
Highlights and features
- Family-owned HVAC expertise since 1983 with local market knowledge.
- EPA-certified technicians ensure safe, compliant service delivery.
- Comprehensive maintenance contracts extend equipment lifespan and efficiency.
- Affiliated with industry leaders like Mitsubishi Electric and ACCA.
- 24/7 emergency service for urgent heating and cooling needs.
Associations and certifications
- Air Conditioning Contractors Of America (ACCA)
- Refrigeration Service Engineers Society (RSES)
- Mitsubishi Electric Diamond Contractor
- York Liberties Dealer
- PSEGLI Cool Homes Contractor
Services
Residential HVAC
We provide comprehensive heating and cooling solutions for homes, including system installation, repair, and maintenance. Our services ensure year-round comfort through high-efficiency furnaces, boilers, and heat pumps. Technicians service all brands while offering energy-saving upgrades and 24/7 emergency response for critical failures.
Commercial HVAC
Our commercial HVAC services include system design, installation, and maintenance for businesses and facilities. We focus on energy-efficient solutions that reduce operating costs while maintaining occupant comfort. Our team handles large-scale systems and offers maintenance programs to extend equipment lifespan and ensure compliance with warranty requirements.
Maintenance Contracts
Preventive maintenance agreements include regular inspections, filter replacements, and system tune-ups to optimize performance. Contracts offer 15% discounts on parts, priority service scheduling, and extended warranties. These programs help prevent breakdowns, improve efficiency, and prolong equipment longevity for both residential and commercial clients.
Indoor Air Quality
We install and service air purification systems, humidifiers, dehumidifiers, and UV lamps to improve indoor air quality. Our solutions address allergens, pollutants, and humidity imbalances in homes and businesses. Technicians perform carbon monoxide testing and recommend customized filtration systems to create healthier living and working environments.
Ductless Air Conditioning
Ductless cooling systems provide zoned temperature control for homes and businesses without existing ductwork. We install energy-efficient mini-split systems that offer quiet operation and precise climate management. This solution works well for room additions, garages, or buildings where traditional duct installation would be impractical or costly.
Questions
What HVAC services does DML & S offer?
We provide residential and commercial HVAC installation, repair, maintenance, indoor air quality solutions, and 24/7 emergency services across Long Island.
Do you offer emergency HVAC service?
Yes, we provide 24/7 emergency service for urgent heating and cooling needs in Nassau and Suffolk Counties.
Are financing options available?
Yes, we offer financing options for HVAC system installations and upgrades through our PSEGLI partnerships.
What areas do you serve?
We serve Nassau and Suffolk Counties, including Miller Place, Mount Sinai, Smithtown, and surrounding Long Island communities.
What certifications do your technicians hold?
Our technicians are EPA-certified and affiliated with ACCA, RSES, and manufacturer-specific programs like Mitsubishi Electric.
