There is an exhaust pipe from the furnace that goes up and out of the ceiling. There are 2 holes in the pipe, below where the exhaust pipe connects to the straight pipe that goes up and out of the ceiling. I am wondering what these holes are for. I have a photo but I guess I can
Plumbing, HVAC, Furnace Repair
HVAC-Talk: Heating, Air & Refrigeration Discussion
HVAC-Talk: Heating, Air & Refrigeration Discussion
HVAC-Talk: Heating, Air & Refrigeration Discussion
PPT - Welcome to: Air Conditioning Maintenance & Repair Course PowerPoint Presentation - ID:3889476
Lennox Warranty Your Way, Air Conditioner, Furnace & HVAC Warranty Registration
HVAC-Talk: Heating, Air & Refrigeration Discussion
HVAC-Talk: Heating, Air & Refrigeration Discussion
HVAC-Talk: Heating, Air & Refrigeration Discussion
Air Filters All Sizes of HVAC, Furnace and AC Filters
HVAC-Talk: Heating, Air & Refrigeration Discussion
HVAC-Talk: Heating, Air & Refrigeration Discussion
HVAC-Talk: Heating, Air & Refrigeration Discussion
HVAC-Talk: Heating, Air & Refrigeration Discussion
Renewable energy - Wikipedia