A clear difference in HFCWO devices. Since therapies can be effective only when patients comply with them, the SmartVestÂ® Airway Clearance System from Electromed stands apart among high frequency chest wall oscillation (HFCWO) devices.
The 2012 USDA Plant Hardiness Zone Map is the standard by which gardeners and growers can determine which plants are most likely to thrive at a location. The map is based on the average annual minimum winter temperature, divided into 10-degree F zones.
The USDA Plant Hardiness Zone Map. Considered the standard measure of plant hardiness, the USDA Zone Map is generally is based on the average annual minimum winter temperature, divided into 10-degree F zones. Go to the USDA Plant Hardiness Zone Map! Click on above image and it will take you to the USDA Plant Hardiness Zone Map. Note: This USDA Plant Hardiness Zone Map was updated in January of 2012, the first update since 1990. About half of the country is a half-zone warmer.