Arterial clots form in the arteries and cause immediate symptoms. This is due to the fact that the clot prevents oxygen from reaching vital organs. This can lead to stroke, heart attack, and even paralysis. Venous clots form in the veins and develop slowly over a long period of time.
1 Many kitchen exhaust fans are part of a range hood, which can cost $30-$4,500, depending on size, type and cfm; installation adds another $250-$1,500, depending on whether the project is simply connecting and hanging the range hood, or if new metal ductwork must be installed to exhaust the air outdoors. It can cost $150-$600 or more for a powerful but quiet fan with most or all of the options -- decorative light fixture, heater, nightlight, timer, humidity sensor (turning the fan on whenever needed) and Energy Star rating.
The size of fan needed to effectively vent your attic is typically determined by the size of the area it will service. Installing a fan to accommodate a small building up to 1000 square feet costs an average of $287. The same project in moderately sized locations costs $344 for a 1000-1500 sq. ft., $428 for 1500-2000 sq. ft., and $507 for 2000-2500 sq. ft. Since larger buildings require even more substantial fans, installation prices average $679 for 2500-3000 sq. ft. sites and $814 for buildings of more than 3000 sq. ft.