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39 Years
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Emergency
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Trusted HVAC Solutions in Nashua, NH
Winchester Mechanical is a second-generation, family-owned HVAC company serving New Hampshire and Massachusetts for over 40 years. Founded in 1987, we specialize in commercial and residential heating, ventilation, and air conditioning systems, with a focus on quality workmanship and reliable service. Our team of certified technicians delivers full-service solutions, including installation, maintenance, and repair of HVAC systems, geothermal heating and cooling, and custom ductwork. We prioritize employee well-being and professional development, ensuring consistent service excellence for our clients. Our expertise spans diverse industries, including schools, warehouses, medical facilities, and restaurants.

We are committed to energy efficiency, sustainability, and long-term client relationships. Our projects reflect our dedication to precision, performance, and customer satisfaction. With headquarters in Nashua, NH, we are licensed to serve both residential and commercial clients across Southern New England. Our reputation is built on decades of proven results, technical expertise, and a client-first approach. We offer strategic electrification, design-build services, and process piping installations tailored to demanding environments.
Services
Commercial HVAC Installation Residential HVAC Services Geothermal Heating & Cooling Indoor Air Quality Systems Design-Build HVAC Solutions Sheet Metal Fabrication Process Piping Installation Emergency HVAC Repairs Strategic Electrification Equipment Maintenance
Details
  • Year established: 1987
Highlights and features
  • We offer 40+ years of experience in commercial and residential HVAC systems.
  • Our team includes certified technicians with expertise in complex installations.
  • We provide 24/7 emergency HVAC services for urgent client needs.
  • We specialize in geothermal systems for sustainable, long-term energy savings.
  • Our design-build approach ensures tailored solutions for demanding environments.
What people say
Integral part of our new construction Looking forward to working with them again
Services
Commercial HVAC Installation
We design and install custom commercial HVAC systems for demanding environments. Our solutions ensure energy efficiency, reliability, and compliance with industry standards. Clients benefit from reduced operational costs and long-term comfort.
Geothermal Heating & Cooling
Our geothermal solutions leverage earth's stable temperature for sustainable heating and cooling. Systems reduce energy bills by up to 70% while minimizing environmental impact. Ideal for new construction or retrofits.
Indoor Air Quality Systems
We install advanced indoor air quality systems to enhance ventilation and reduce pollutants. Solutions include filtration, humidity control, and ventilation upgrades for healthier commercial and residential spaces.
Design-Build HVAC Solutions
Our design-build approach integrates engineering and installation for seamless HVAC projects. Clients receive tailored systems optimized for their facility's unique requirements and energy goals.
Emergency HVAC Repairs
We offer urgent HVAC repair services to minimize downtime for commercial clients. Our rapid response team ensures critical systems are restored quickly and efficiently.
People
Chris DeChirico
Operations Manager
Chris oversees daily operations and project management at Winchester Mechanical. With extensive HVAC industry experience, he ensures efficient service delivery and client satisfaction across all projects.
Nick DeChirico
Project Manager/Estimator
Nick specializes in project planning and cost estimation for complex HVAC installations. His expertise ensures accurate budgeting and timely execution of commercial and industrial projects.
Robert Pinard
Field Service Advisor
Robert provides technical guidance for HVAC service and repair projects. His hands-on experience ensures optimal system performance and client support for residential and commercial clients.
Ken Winchester
Manager
Ken leads Winchester Mechanical's strategic initiatives. As founder, he brings decades of HVAC expertise, focusing on quality craftsmanship and long-term client relationships in Southern New England.
Sandra Barry
Office/Financial Manager
Sandra manages financial operations and administrative functions at Winchester Mechanical. Her organizational skills ensure smooth business operations and client communication.
Questions
What HVAC services does Winchester Mechanical offer?
We provide commercial and residential HVAC installation, maintenance, repairs, geothermal systems, indoor air quality solutions, and design-build services.
Do you serve both New Hampshire and Massachusetts?
Yes, we operate throughout Southern New Hampshire and Massachusetts, delivering HVAC solutions to residential and commercial clients.
Are emergency HVAC services available?
Yes, we offer 24/7 emergency repair services to address urgent heating and cooling needs for businesses.
What are the benefits of geothermal HVAC systems?
Geothermal systems reduce energy use by 50-70%, lower utility bills, and provide sustainable heating and cooling with minimal environmental impact.
How long has Winchester Mechanical been in business?
We've served clients since 1987, providing over 35 years of expertise in HVAC installation and service across New England.