The X6673 Compatible by Atomic is the perfect replacement filter for your Lennox furnace filter. X6673 Lennox OEM 20x25x5 Original HCF20-16 Replacement - 2 Pack $65.44Ītomic Filters High-Quality Compatible Filter for the Lennox X6673 -2 pack $49.95 This measurement is referred to as the "Nominal Size". Instead, a rounded up number is used to label filter packages. What you might not realize is that filters are not sold by their actual dimensions. Air filters are generally listed by their nominal size which can cause some confusion with consumers. First, you need to consider the actual size of the filter and make sure its actual dimensions match the filter you are replacing. It is however important when looking for a compatible filter to understand filter sizing to make sure it is compatible with the exact model. When it comes to filters both size and compatibility matter. How to Get The Right Filter Size Lennox Furnace Filter Recommended Replacement Every 2 to 3 Months.The X6673 also known as the X6673 Air Cleaner Filter Media for HCC20-28 - 20x25x5 is compatible with a wide variety of systems including Honeywell, Trion Airbear and Carrier. Atomic Filters stocks an extensive selection of the Lennox brand furnace filters including the popular Lennox X6673 MERV 11 air filters. Two-by-ten or 2 x 10 Why is lumber not the actual size?Lennox makes superior quality air filters. What are the actual sizes of dimensional lumber?ĭimensional Lumber: Nominal Size vs. The nominal measurement is made before the lumber is surfaced. The reason is that dressed lumber has been surfaced or planed smooth on four sides (called S4S). The “nominal” cross-section dimensions of a piece of lumber, such as 2 X 4 or 1 X 6, are always somewhat larger than the actual, or dressed, dimensions. How thick is a 1×4?ġ x 8ē/4 x 7 1/4 inches (19 x 184 mm) Why is lumber not actual size?
Instead, a 2×4 is really only 1 1/2″ by 3 1/2″. Because of this extra milling, a 2×4 no longer measures a full 2 inches by four inches. Now, most timber is milled and planed to give it a little more of a finished look, and a little more of a consistent size and profile. However, an 8-foot 4×4 supports 6468-pounds and 2339-pounds at 14-feet, while a 6×6 is 1800-pounds respectively – or 64% and 78% more load capacity. The load capacity of a 3-foot #2 grade 4×4 is 17,426 pounds, and a similar 6×6 is 20,834 pounds or 16% better. What are the dimensions of a 4 by 4?Ĥ″ x 6″ 3-1/2″ x 5-1/2″ 89 x 140 mm How much load can a 4×4 post support? The nominal 2×4 thus became the actual 1½ x 3½, imperceptibly, a fraction of an inch at a time. Size standards, maximum moisture content, and nomenclature were agreed upon only as recently as 1964. This pressured further compromise because thinner 2x4s were a way to compete in price with wood alternatives. While it doesn’t really shrink that much, the mills get more usable finished 2×4’s from a given tree if they cut them slightly smaller to begin with. The 2×4 refers to the rough-cut green wood: it shrinks during drying, then the dried wood is planed smooth, so the finished lumber is supposed to end up at 1.5″x3. Maybe you’ve noticed that lumber sizes are often misleading. This was revised in 1926, 1928, 1939, and 1953, while still another revision is proposed for adoption in 1964. After World War I, the increasing demand for construction lumber led to the first national size standard in 1924. Early concepts called for rough lumber to be of full nominal size, often in the dry condition.
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