Your Source for Green Heating, Cooling, & Plumbing on Martha's Vineyard

Contact Us Obsolete

Contact Us Obsolete


If you are a new customer in need of service, click here to expedite the process by filling out our online service intake form.

If you are building a new home or renovating your existing home, click here to expedite the process by filling out our online new construction intake form.

Nelson Mechanical Design (NMD) has a new phone system! After dialing 508 696 3120, please use the following extensions:

Bookkeeping:  please press 2 to reach Clara Matherly for all bookkeeping and financial statements.   Her email is

Human Resources and Marketing:  please reach out to Sarah Henry.   Her email is

Service Manager:   please press 1 to reach Marlon Dwyer for all service scheduling and invoicing.  His email is

New Construction:   please press 3 to reach Dave Sprague the Head of New Construction at NMD. His email is

Mini-Splits Team:   please press 4 to reach Nick Lucas for all mini-split projects at NMD.   His email is

HVAC – Homeowner Team: please press 8 to reach Tom Neadow for all Homeowner HVAC projects. His email is

HVAC – Contractor Team: please press 9 to reach Matt Rivers for all Contractor HVAC projects. His email is

Plumbing Team: please press 3 to reach Dave Sprague for all Plumbing installation, and remodeling projects. His email is

Geothermal – Radiant – Rescue Team:  please reach out to Brian Nelson.  His email is

Our mailing address is Nelson Mechanical Design, Inc., 455 State Road, PMB #264, Vineyard Haven, MA 02568

By Phone: 508-696-3120
By Fax: 508-687-9565


Thank you for your inquiry!

We appreciate your interest in our services and installations!  We look forward to working with you towards meeting your HVAC and plumbing needs.  Our goal is to respond quickly to your query – we try to respond via phone or email the same day for service queries and within a few days for new construction projects.


IMG_9986 Marlon medium rotated resizedIf you are inquiring about service, you will most likely hear back from Marlon Dwyer, our service manager
(  phone extension 1):










If you are inquiring about the installation of a new HVAC or plumbing system, you will most likely hear back from Dave Sprague, the head of our new construction department.  (  phone extension 3):




NickL-LowIf you are inquiring about the installation of a mini-split heat pump, you will hear back from Nick Lucas, head of our mini-split department ( phone extension 4):