Hazardous chemicals can induce a hot zone, as occupants are in danger of it disrupting their biological processes. For example, if while driving down a highway, an oil tanker gets into a car accident and spills its load on the pavement and surrounding grass areas, those areas affected will be considered hot zones.
Costs to convert wood fireplace to gas. Installing a gas line and either vented or vent-free gas logs will cost from $500 to $2,500. (Note that the cost of installing vent-free gas logs is often about $200 more than the cost for vented.) Gas inserts cost $2,000 to $5,500. Expect to pay more for fireplace installation if workers are challenged to get the gas line to your fireplace.
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.