12x24x1 MERV 13 Air Filter — 12-Pack

This 12x24x1 MERV 13 air filter 12-pack ships free from Cedars HVAC Supply. MERV 13 catches particles down to 0.3 microns — smoke, bacteria, respiratory droplets — and this 12x24x1 case gives you a year of that top-tier protection.

Our 12x24x1 MERV 13 air filter ships free from four US warehouses. Every 12x24x1 MERV 13 air filter in this 12-pack is pleated USA-made media, individually wrapped, and same-day dispatched. Reorder your 12x24x1 MERV 13 air filter on any 30/60/90-day cycle to lock in year-round supply.

What’s In Your 12x24x1 MERV 13 Air Filter 12-Pack

Each case contains 12 individual 12x24x1 pleated air filters rated MERV 13, so you’re covered for roughly a year of monthly changes without reordering. This is one of the most common residential filter sizes in the United States, making it a safe bet for most standard return grilles. It’s the tier where the case-of-12 pricing math works best because production volume keeps the per-filter cost down. Whether you call it a furnace filter, an air filter, or an HVAC filter, this 12x24x1 case of 12 is built to be the only 12x24x1 filter purchase you make this year.

Fast 12x24x1 MERV 13 Air Filter Shipping — 4 US Warehouses

Because we ship 12x24x1 cases from a coast-to-coast production and fulfillment network — Florida, Texas, Nevada, and Pennsylvania — lead times are unusually short for the industry: same-day dispatch on standard sizes, 2-day delivery for about 80% of the US, and free ground shipping on every 12-pack. No account setup, no minimum order beyond the case, no shipping surprises at checkout.

When to Replace

For a 1-inch pleated filter, plan on replacing every 30 to 60 days. The media isn’t dense enough to absorb months of loading — a filter that goes 90+ days between changes stops helping airflow and starts hurting it. With 12 filters in the case, you’re set up for monthly changes across a full year without a reorder.

Case Handling & Storage Tips

Store your case flat, in a dry closet or utility room, out of direct sunlight. Filters kept in a garage or attic through a Miami summer can develop a faintly musty smell from ambient humidity — nothing that affects filtration performance, but noticeable when you open the first one. If you’re a property manager stocking multiple 12x24x1 slots across a portfolio, label the case with the property address and thickness so no one accidentally installs the wrong depth into a wrong-sized slot.

How MERV 13 Filtration Works In A 12x24x1 Air Filter

MERV 13 is the highest efficiency most residential HVAC systems can safely accommodate. It captures particles down to 0.3 microns, which brings smoke, bacteria, and virus-carrying droplets into the capture zone alongside everything the lower tiers catch. This is the tier hospitals and clean rooms use for pre-filtration, and it’s the top choice for wildfire-prone regions or immunocompromised households. The one caveat: MERV 13 media is denser, so older single-stage HVAC systems may see a modest airflow reduction that can require a fan-speed adjustment.

Specifications

• Nominal Size: 12x24x1 inches
• Actual Size: 11.5 x 23.5 x .75 inches
• MERV Rating: 13
• Thickness: 1-Inch Filter
• Filter Media: Electrostatic pleated synthetic
• Frame: Beverage-board (moisture-resistant paperboard)
• Support: Galvanized steel mesh
• Quantity: 12 filters
• Made In: USA

How This 12x24x1 MERV 13 Air Filter Compares To Big-Box Alternatives

The 12x24x1 filter you’d buy from a big-box hardware store typically runs $8-15 each at retail — which sounds fine until you multiply it by 12 changes a year. Our 12-pack lands well below that per-unit cost, ships free, and matches or exceeds the MERV 13 rating you’d find on the shelf. Two other differences worth noting: our filters ship from Filter King’s USA-based manufacturing (not a repackaged import), and the pleated media is deep enough to hit the MERV 13 rating consistently rather than sliding to a lower effective MERV when the filter starts loading.

Why We Sell 12x24x1 By The Case

Buying 12x24x1 filters twelve at a time is the pattern we see from every category of customer that actually tracks their HVAC costs — property managers, small HVAC contractors, and homeowners who’ve been through a few filter cycles. The single-filter retail path is convenient for a one-off emergency, but as a repeat purchase strategy it costs you significantly more per year.

System Fit

1-inch filters fit the vast majority of residential HVAC return grilles and furnace slots in the United States. If your system was built for standard 1-inch media and you’re not sure about the size, measure the old filter before ordering — nominal size (the number printed on the frame) is what you want.

South Florida & Miami Homeowners

For Miami and South Florida homeowners, the 12x24x1 filter is a workhorse — humidity, coastal dust, and year-round AC usage mean your filter is working every day, not just during summer or winter seasons like it does in colder climates. That accelerates filter loading, which is why our Miami-area customers typically go through a full 12-pack in 10-12 months rather than 12 flat. If you’re running AC 12 months a year (which almost every South Florida household does), plan on the higher end of the replacement frequency. Coastal humidity also stresses filter frames — our beverage-board frame is moisture-resistant, but a filter that sits soaked from a leaky return duct will still degrade. If your return grille sweats in humid weather, that’s a duct-sealing issue worth addressing, not a filter problem.

For Property Managers, Contractors & Commercial Buyers

Commercial buyers ordering 12x24x1 filters at scale get access to services we don’t list on the individual product page: bundled and labeled job-tagged shipments, delivery to job sites or warehouses, tiered volume discounts, and a real human account manager who tracks your standing order. This 12-pack listing is the retail SKU — for a facilities portfolio or HVAC service company, contact [email protected] for a business account.

Frequently Asked Questions

Do these fit my system?

Check the size printed on your current filter. If it says 12x24x1, this case fits. If your existing filter is a different size or thickness (e.g. 2-inch instead of 1-inch), do not force this filter into a differently-sized slot — order the correct size instead.

Can I subscribe to have these auto-shipped?

Not yet — we’re working on adding a subscription option. In the meantime, ordering a full 12-pack case gives you a year of coverage with a single checkout, which most customers prefer over monthly recurring shipments.

How is the actual size 11.5 x 23.5 x .75 different from the nominal size 12x24x1?

Nominal size is what’s printed on the filter and what fits your slot; actual size is the true measurement, which is always slightly smaller than the nominal to let the filter slide in and seal. Both measurements are correct for the same filter — you order by nominal, and the actual size is what physically arrives.

What’s your return policy?

Unused, unopened cases can be returned within 30 days. Individual filters that have been removed from packaging and inserted into an HVAC system are not returnable — that’s an industry-wide standard for filtration products.

Learn more: EPA MERV rating overview.