Nelson Mechanical Design, Inc. Mechanical Systems Design & Contractor Martha's Vineyard, Nantucket, Cape Cod


	GREEN BUILDING
	NEW! Mansion House Goes Green with Geothermal
	NEW! NMD National Award
	Daikin Altherma Heat Pumps
	ENV Remote Home Control
	LEED for Homes Residence
	Net Zero Home, Longview
	Net Zero Home, W. Tisbury
	Geothermal Heat Pumps
	Air to Water Heat Pumps
	Air to Air Heat Pumps
	Solar Thermal
	The NMD Testing Lab
	Twenty Panel Solar Hot Water
	Atria Restaurant Solar
	Geothermal / Solar Hybrid
	Ocean-front Geothermal Concept
	Pond-Based Geothermal Concept

	PLUMBING
	Residential
	Commercial
	Hot Water Heating
	AquaPex
	Clivus Composting Toilets
	Custom Plumbing Solutions
	Fixtures

	HYDRONIC HEATING
	Hot Water Boilers
	Radiant Floor Heating
	Radiant Panels & Towel Warmers
	Hydro Air Systems
	Multi Aqua Systems

	RINNAI HEATING
	HVAC
	Ducted Systems
	Ductless Systems
	Ductless Multi Aqua Heating and Cooling
	Fresh Air Exchange
	Indoor Air Quality

	GAS PIPING

	MECHANICAL DESIGN
	Schematics and Specs
	CAD Drawings and Design

	WIND ENERGY INFO
	MV Wind Energy Info Site

	ARTICLES

	CONTACT NMD

DUCTLESS SYSTEMS
Ductless systems offer an ease of installation that ducted systems cannot. These systems can provide cooling, and often times, provide efficient heating as well. There are many indoor models to choose from. Most manufacturers can provide a single outdoor unit to feed up to three indoor units (or zones). For more on heating, please see our Air to Air Heat Pump page.
Daikin is one of the world's largest HVAC manufacturers. I provides unserpassed efficiency and quality of construction.
Highwall Unit This is the most common of ductless indoor units. This unit is mounted on an exterior wall about 12" from the ceiling. Refrigerant piping is installed through the wall to the outdoor unit.
Flush Ceiling The flush ceiling unit is a good choice for those customers who do not prefer the highwall unit. Most of the unit is recessed into the ceiling. The white four way diffuser grille is the only part seen from the living space.
Ceiling Suspended The ceiling suspended unit is great for an office or workspace due to its utilitarian asthetic. Easily installed due to its exposed nature.
Console Unit The console unit is normally installed for a ductless system that is both heating and cooling. It is floor mounted which is preferable for heating.
Single and Multi Split Outdoor Units These outdoor units can provide heating and cooling efficiently. These quiet units can power one, two, or three indoor units.
VRV-S Outdoor Units The VRV-S outdoor units can provide heating and cooling with incredible efficiencies. The can power even more indoor units than the single and mutli split types - up to 125% of their capacity. They can not only feed ductless systems, but also ducted as well.