SKU: 93666758995

Mason-Lite 12" x 24' Class A Air-Cooled Chimney System for MFP33, MFP39, MFP44 and Custom Units Masonry Fireplaces

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Description

Mason-Lite 12" x 24' Class A Air-Cooled Chimney System for MFP33, MFP39, MFP44 and Custom Units Masonry FireplacesMason Lite is approved with any UL 103 listed metal chimney used in gas and wood applications. For your convenience, we have partnered with DuraVent. Available in DuraChimney II and DuraTech. What's Included (4) 12DCA 48 12DCA 36 12DCA APD 12DCA IS 12DCA RRS 12DCA VC 12DCA FS 12DCA SC Features Available in 16' and 24' chimney systems For use with Mason Lite MFP33, MFP39, MFP44 and Custom Units Firebox Kits Specifications Item Number Mason Lite 12DCA

Mason-Lite is approved with any UL 103 listed metal chimney- used in gas and wood applications. For your convenience, we have partnered with DuraVent. Available in DuraChimney II and DuraTech.

What's Included

  • (4) 12DCA-48
  • 12DCA-36
  • 12DCA-APD
  • 12DCA-IS
  • 12DCA-RRS
  • 12DCA-VC
  • 12DCA-FS
  • 12DCA-SC

Features

  • Available in 16' and 24' chimney systems
  • For use with Mason-Lite MFP33, MFP39, MFP44 and Custom Units Firebox Kits

Specifications

Item Number Mason-Lite - 12DCA-24K
Product Type Chimney System
Chimney System Model Class A Air-Cooled Chimney System
Size (Diameter) 12"
Length 24' (288")

Warranty

Lifetime Limited Warranty

MASON-LITE FIREPLACE

Masonry Fireplaces Industries, Inc. (MFI) warrants all Mason-Lite Fireplaces to be free from defects in materials that adversely affect fireplace performance for the lifetime of the product from the date of purchase, subject to the terms and conditions of this limited warranty.

MFI does not warrant accessory chimney, outside air ducts and devices not manufactured by MFI.

This warranty covers only products manufactured by MFI, specifically the modular concrete firebox, and NO WARRANTY, EXPRESS OR IMPLIED, EXTENDS TO ANY OF THE HARDWARE, FOUNDATION, VENTING, DUCTS, OR ACCESSORIES. THIS WARRANTY DOES NOT COVER DRAFTING, SMOKING, OR SOOTING OF THE FIREPLACE SYSTEM. Factors beyond the manufacturer’s control affect drafting, smoking, and sooting and MFI cannot guarantee these aspects of performance.

Coverage under this warranty is subject to the following conditions and exclusions:

  • This warranty is null and void when the fireplaces are not installed pursuant to the installation instructions provided by MFI or local building codes have not been followed completely.
  • Glass is warranted against thermal breakage only and only on models that are manufactured by MFI with a glass front. On Direct Vent models the safety glass or safety screen must be kept in front of this glass when fireplace is in use. Safety screen must be used on all models when in use.
  • This warranty does not apply to any component or part that shows evidence of misuse, abuse, improper installation, accident or lack of regular maintenance. MFI is not responsible for misuse or mishandling of component parts.
  • This warranty does not apply to any damage sustained to the appliance while in transit.
  • Neither MFI, nor any affiliate thereof, is responsible for any labor costs or indirect costs incurred for the replacement of defective components. Any covered component that, in our judgment, is defective shall be repaired, replaced or refunded at MFI’s option.
  • Nothing in this warranty makes MFI, or any affiliate thereof, liable in any respect for any injury or damage to the building or structure in which the fireplace has been installed or to the persons or property therein arising out of the use, misuse, or installation of properly manufactured MFI products.
  • The fireplace must be used in accordance with operating instructions. The grate or andirons must be installed when using the fireplace.

NEITHER MFI, NOR ANY AFFILIATE THEREOF, SHALL BE HELD LIABLE FOR ANY INCIDENTAL OR CONSEQUENTIAL DAMAGES OR EXPENSES ARISING OUT OF THE USE OF THE FIREPLACE. ALL SUCH DAMAGES AND EXPENSES ARE HEREBY EXCLUDED. Some states do not allow the exclusion or limitation of incidental or consequential damages, so the above limitation or exclusion may not apply to you.

If a component is found to be defective under the terms of this warranty, the party this warranty is extended to shall notify MFI in writing, by registered mail, within thirty (30) days following the discovery of the defect within the lifetime warranty period. The letter shall include proof of purchase and state the (1) date of purchase, model number and serial number ; (2) place of purchase; (3) address of installation; (4) name, address and phone number of the homeowner; and (5) a brief description of the defect.

This warranty applies only to those fireplaces installed in the continental United States, Alaska and Canada. If any part of this warranty is found to be unenforceable, the remaining parts shall remain in force and effect.

THE FOREGOING WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ALL OTHER WARRANTIES, TERMS OR CONDITIONS, EXPRESS OR IMPLIED EITHER IN FACT OR BY OPERATION OF LAW. MFI HEREBY DISCLAIMS ALL GUARANTEES AND WARRANTIES, EXPRESS OR IMPLIED, BEYOND THE WARRANTIES SET FORTH HEREIN, INCLUDING BUT NOT LIMITED TO WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. Some states do not allow limitations on how long an implied warranty lasts, so the above limitation may not apply to you.

Revision date: 1/29/2015

Documents & Files

Videos

Mason Lite Dry Stack MFP44

Frequently Asked Questions

Is the fireplace safe to use?

Yes, it has been tested to UL 127 Standard for safety by PFS TECO. The fireplace is listed by PFS testing agency, ICC, (International Code Council) and quality control standards are used in manufacturing.(ESR -2401)

Can I install the fireplace on a wood floor?

Yes: please use the required metal base under unit sold by MFI or use CMU block. Air space clearances range from 6″ to 8″ depending on the model.

Do I have to install the outside air kit on the fireplace?

The local building code will tell you if this is required in your area. The fireplace will work without the outside air kit, although, it is more efficient to use outside air for combustion.

Do I need firebrick inside the firebox?

Yes: MFI can supply firebrick panels for easy installation or a mason can lay firebrick inside the firebox.

What type of chimney do I use on this fireplace?

The fireplace has been tested with both a masonry chimney, manufactured by MFI, or Class A listed metal chimney. The different models can use different diameter metal chimney that will fit almost all installation needs. When installed, the maximum overall height of the Mason-Lite fireplace is 40 feet. The minimum installation height is 14 feet, given that the chimney is straight. If the chimney is not straight, the minimum installation height is 17 feet.

Do I need a log holder or grate in the fireplace?

Yes, you should use a grate to hold the wood in the firebox for better combustion and safety.

Can I install a mantel or decorative stone or marble on the front of the fireplace?

Yes. Just follow the installation instructions for safe installations.

Can I install decorative gas logs in this wood-burning fireplace?

Yes. Follow the manufacturers instructions for safe installation and operation.

Can I install a log lighter in the fireplace?

Yes. Follow the manufacturers instructions for safe installation and operation.

Can I install a glass door on the fireplace?

Yes, Follow the manufacturers instructions and always have doors in the fully open position when using the fireplace.

Can I install fireplace on upper levels floors of a building?

Yes with the lightweight design of MFI fireplaces will work on most applications. You must have a structural engineer determine the load limit of the flooring.

Can I install a see-thru wood-burning fireplace?

Yes. The MFPST43 You will need to install a chimney exhaust type fan in most installations.

Can I install this fireplace outside?

Yes. It is listed for BOTH indoors and outdoors.

What are the minimum and maximum fireplace heights for the Mason-Lite fireplace?

When installed, the maximum overall height of the Mason-Lite fireplace is 40 feet. The minimum installation height is 14 feet, given that the chimney is straight. If the chimney is not straight, the measurement is 17 feet.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
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  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 93666758995

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Silvia & Marcus
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★★★★★ 5
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Fit Type: Regular Fit, Color: Grey, Size: Large
These are my new favorite shirts! I just ordered a 3rd. i wish there were more colors. Yes, the cotton is heavy-weight and I like that. They are just a bit warmer than regular dress shirts. The fit is excellent. I'm 5'9", 200lbs and L fits perfectly. Enough room without being blousy. The sleeves are long enough (finally!). (Most other 16.5/32-33 shirts always have sleeves that are too short). The fit/finish and detail is surprisingly good. They don't really shrink after washing and come out very soft. Not wrinkle-free, but that's ok since it means that the 100% cotton hasn't been dosed with chemicals. I expect they will wear very well over time.
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Reviewed in the United States on May 5, 2025
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Jerry
Battle Creek, US
★★★★★ 5
A perfect white work shirt.
Fit Type: Regular Fit, Color: White, Size: Medium
Thick, durable, iron exquisitely and the fit is spot on. Perfect white work shirt. I have a grey shirt too, the quality is the same.
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Reviewed in the United States on March 4, 2026
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Blusher
Massapequa, US
★★★★★ 3
Right fit
I love this shirt it was nice and bright when I got it after a few wash it started to fade out a bit was a perfect fit for a medium built person 5’7 I still would recommend this product they are really nice and thick
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Reviewed in the United States on September 14, 2025
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John E. Holiday
San Leandro, US
★★★★★ 5
Quality shirt. Not too blousy.
I'm 5'11" and hover around 175-180 lbs. so I'm a pretty average guy. I've been thin my whole life but now I'm in my 40's so if I don't watch it, my stomach will get bigger. I bought this shirt in slim-fit first. It was perfect but since these shirts are 100% cotton, I was concerned that after a couple washings, it would be too small (especially in the stomach area). I returned the slim-fit and bought this regular-fit (medium). For this review, I thought it would be helpful to compare the Amazon Essentials shirt to The Gap's regular oxford shirt. I've always liked the fit of Gap oxford shirts. Upon inspection, the weight and feel of the Amazon oxford cloth is exactly the same at the Gap's. I laid one of my old Gap shirts on top of this Amazon Essentials oxford. You can see from the pictures that the torso cut is exactly the same (about 21 inches pit-to-pit seam). I like that. I'm not a fat guy and I don't want a blousy shirt. This is neither too blousy nor too slim. Just right. The sleeves are perhaps 1/2 inch longer than the Gap shirt. Perhaps one negative is the tail. The Amazon Essentials tail is 1.5-2" longer than the Gap shirt. This makes the Amazon Essentials shirt a touch long for wearing untucked in my opinion. However, if you do tuck, a longer shirt stays tucked-in. So it depends how you want to wear it. I have a lady who does alterations. She'll charge $10 to shorten the tail if I wanted that. If I do have the Amazon shirt altered, it would still be a bargain. These are good quality shirts with a nice cut to them. I won't hesitate to buy them again. Highly recommended.
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Reviewed in the United States on January 24, 2020
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Tracy J
Chelsea, US
★★★★★ 4
Decent quality. Sizing is normal but a bit generous in the midsection
Fit Type: Regular Fit, Color: White, Size: Large
I was impressed. Shirt is of fairly decent quality- thick cotton. My husband is normally a large. Given the sizing chart we almost ordered a medium, but it was good we bought a large. The sleeves are perfect but afraid it may shrink in the dryer. I think the reason people say loose fit is because it is boxy (square). Fine under a suit and we needed it urgently.
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