The cause is not known. There is also secondary Raynaud's, which is caused by injuries, other diseases, or certain medicines. People in colder climates are more likely to develop Raynaud's. It is also more common in women, people with a family history, and those over age 30.
Gas Fireplace Average Costs. The actual cost to install a gas fireplace may vary depending on your location, the product selected, complexity of the installation process, additional accessories purchased, and other options. Top vented gas fireplace inserts cost $750 to $3,000, and installation adds another $500 to $1,000.
A direct vent system is a very efficient alternative to a traditional gas fireplace. Direct Vent Fireplaces are factory built and their venting can be routed directly through a wall to the outside, using rigid or flexible venting. Direct vent systems are either co-axial (as stated above) or co-linear; Co-linear Direct Vent Fireplaces are used to vent through an existing wood burning chimney.