The National Association of the Deaf (NAD) defines a person who is deaf as someone who is âunable to hear well enough to rely on their hearing and use it as a means of processing information.â Additional information can be found at the NAD site, http://www.nad.org/infocenter/ infotogo/dcc/difference.html.
A contractor will charge $308 to install a 14-inch power ventilator which includes the labor and material; you can do it for more than half and pocket a 57 percent savings.or about $130 you can buy what you need: a power ventilator, an electrical box and cover, a short piece of three-wire BX or Romex cable, a package of wire nuts and a quart of roofing cement.
1 A gas fireplace that needs ventilation will cost upwards of $350 to $800. 2  This price does not include the installation itself. 3  A fireplace that does not require ventilation, it can cost $500 to $2,500. 4  A direct vent fireplace that vents through a hole in a wall can cost $1,400 to $4,000 not including labor. The price varies based on the design and the energy output of the fireplace itself. 2  For example, a Lennox 42 inch stainless gas fireplace is big and powerful enough to provide enough heat in a house. 3  These are priced from $2,400 to $3,700.