What is the main concern when installing gas appliances in confined spaces?

When installing gas appliances in confined spaces, the primary concern is ensuring proper ventilation to prevent carbon monoxide buildup. Gas appliances, when operating, can produce carbon monoxide, a colorless and odorless gas that is harmful and potentially fatal in high concentrations. In confined spaces, the lack of sufficient airflow can lead to the accumulation of this dangerous gas, increasing the risk of carbon monoxide poisoning.

Therefore, adequate ventilation is crucial to allow for the safe dispersal of any combustion byproducts, including carbon monoxide, thereby ensuring a safe operating environment around the gas appliance. This is why maintaining proper ventilation is a vital aspect of gas appliance installation in limited spaces.