A brutal winter has sent shivers around the country and in New Jersey it’s not over yet. Cold weather and biting winds whistling through the warehouse environment may cause employees to batten down the hatches by closing normal venting outlets such as doors, windows and skylights. It opens the possibility of carbon monoxide (CO) levels rising to an unsafe level. Carbon monoxide, a colorless and odorless gas, is a by-product of all internal combustion engines. In this scenario, it’s time to have a Barclay technician check your emission levels and, if necessary, perform a tune up.