CFH stands for “cubic feet per hour” — a unit that measures the flow rate of natural gas, or how much gas an appliance or system consumes in an hour. Knowing the CFH rating of your gas appliances helps ensure your gas line and meter are properly sized for safe operation.
CCF is a related but different unit you’ll often see on your gas bill — it stands for “hundred cubic feet” (100 cubic feet) and measures total gas volume used, not flow rate. So CFH tells you how fast gas is flowing right now, while CCF tells you how much gas you used over a billing period.
If you need to convert CFH to MBH (thousand BTU per hour) for sizing a gas line or appliance, the rule of thumb is that natural gas provides about 1,000 BTU per cubic foot, so 1 CFH is roughly equal to 1 MBH — though your gas provider’s exact BTU content can vary slightly. For any questions about gas line sizing, CFH ratings, or gas appliance installation, the experts at 5 Star Plumbing are ready to help with all your natural gas plumbing needs.