Good snow saftey tip from Encon:
For your safety, please make sure that any furnace or boiler flues and intakes are not being blocked by snow.
In many cases the exhaust and air intake for your boiler or furnace are relatively close to ground level. The massive amount of snow we just received can cause a blockage resulting in a safety hazard. The unit could shut down, or in a worst case carbon monoxide could back up into your home or business. Please make sure that the exhaust flues and air intakes (usually next to each other if they are separate vents) are unblocked. This can be done quite simply with a snow shovel.