excellent question..........we have only specified LaCantina and Nana, but not Marvin yet. However, the reasons for choosing the Marvin are very compelling. I would double check the warranty and make sure that it is going to cover any problems. Also ask the dealership for three phone numbers of satisfied customers so that you can ask them directly.

If you get all the right answers, go for the Marvin.

helpful! thanks!

Muffn, did you decide to move forward with the Marvin Bi-Fold Door? If so, we'd love to see a picture of the final project!

Wow, muffn - it looks absolutely stunning. Thanks so much for sharing! It'd be great to see the another shot once it's all finished, too. Congrats on a beautiful project!

Muffin. We're in the Boston area and also looking at the glass door openings. We've a 12' wide opening which I am guessing is close/smaller than yours? Can you share pricing? We'd also be making a substantial window order from Marvin if we go ahead (45 next gen double hung windows!)

Marvin windows - can you provide a link to the air infiltration rates and R value of your folding system? This is a VERY tight house (R40 walls). Nana's system (one of them) is Passive House certified - you have info on yours? Thanks

Edward k - ours is a 15' opening. The Lacantina door was around 12K. This Marvin door was given to us around cost for about 13K since we bought around 50K in doors and windows.

Helpful, thanks

Edward k, you can find complete details about the Marvin Bi-Fold Door online here. Additionally, this section of our website is dedicated to energy efficiency information. Once you've had a chance to review those pages, please let us know if we can answer any questions - we're happy to help!

Marvin
I've been to that location and it's really not that easy to find the energy information on this the system. All of the other tabs take you directly to the appropriate information on your website but the Energy tab takes you to another completely different area where you need to select the right products. Can you post a direct link OR better upload the information here?
Thanks

Edward k, absolutely - apologies navigating the website was challenging. Please know that I've shared the specifics of your question with a product expert and will get back in touch as soon as possible with those details. Appreciate your patience!

Edward k, thanks for your patience while we confirmed the details of your question with our product experts. Please note that the following is for the Marvin Clad Outswing Bi-Fold door, which has an air infiltration of approximately 0.03 cfm/ft2. Options for Low E coatings include:

• Low E1 with Argon NFRC Values: U Factor: 0.34 (R value: approx. 3), Solar Heat Gain (SHGC): 0.40-0.42, Visual Transmittance (VT): 0.45-0.47, Condensation Resistance (CR): 56, ENERGY STAR certified
• Low E2 with Argon NFRC Values: U Factor: 0.33-0.34 (R value: approx. 3), SHGC: 0.24-0.25, VT: 0.40-0.43, CR: 56-57, ENERGY STAR certified
• Low E3 with Argon NFRC Values: U Factor: 0.33 (R value: approx. 3), SHGC: 0.16-0.17, VT: 0.36-0.38, CR: 57, ENERGY STAR certified

Can we provide additional information to assist with your project planning process?

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For anyone less familiar with this terminology, please find brief definitions below (and online here):

Do you have enything on the air infiltration value of the doors? Thanks!

Edward k, to confirm, are you looking for more information beyond that the Marvin Bi-Fold door has an air infiltration of approximately 0.03 cfm/ft2 as noted above? Just want to be sure we're asking our experts for exactly what you need! Thanks!

Sorry I missed that as I jumped straight to the bullet points. Thanks

Edward k, no worries! If we can help further, please let us know. Best of luck as you continue to plan your project. We'd love to see the finished work!

Muffin - How did it turn out? We are doing a remodel and considering Marvin vs. LaCantina vs. Nana. The length is aabout 12-15ft. Our builder favors Marvin but they are SO expensive that it doesn't make it worth it. It's part 1 of a remodel and we have two more sections about 40' to do. So, this decision impacts a huge area. I am leaning towards Nana. Thoughts?

hi ptk1, It turned out nice. The reason we went with the Marvin door is because the Marvin rep pretty much gave us the door at cost since we were buying a large quantity of Integrity windows and doors from him. That, and the fact that it matched the exterior black of our windows and doors exactly. The cost was about the same as the LaCantina door - the LaCantina rep was surprised because Marvin doors always cost much more. Anyway, we have had some problems with the door - one we're trying to resolve now. One of the parts you use to lock the door into place won't line up now (which means we can't fully seal it shut) and we're waiting on a marvin rep to come out and fix it. They told us it's either from poor installation (our contractor installed it) or it's from the house settling - whichever it is, I hope they can fix it. Ours is approx 179"wx 98" tall, 5 panels, and cost around 13K. We thought the LaCantina was a solid door and would have gone with it had we not gotten the discount. We briefly checked out Nana, but I don't remember why we never considered it! Good luck!

Hi muffn - we're so glad to hear you are happy with how your Marvin door turned out, but are certainly sorry to hear that installation issues have caused some lingering problems for you. Should you need further assistance with the fix, please don't hesitate to message us here on Houzz - we'd be glad to help further. Thank you!

This has been a good discussion Muffin and Ptk1. We too are pricing and comparing Marvin, and Nana. I'm interested in your selection Ptk1. Nana has always been the standard of bi-fold doors and their website is incredibly easy in locating information. And their reps have been superb with quick response time. It definitely makes the job of shopping and learning easy. I've had to lean heavily on Marvin's reps for info which has been great too, but because web site has been a challenge.
My next search is comparing their warranties plus learning about Marvins new release of their bifold April 24. I'm finding Nana pricing is very close to Marvin. There are some variables which sway me to each. This is going to be a tough decision.

pillowfun, glad to hear you are aware of the new Marvin Ultimate Bi-Fold Door launching on Monday. If you'd like to connect directly here on Houzz with any questions or to discuss details, please let us know - we'd welcome the opportunity to learn more about your project.

For a bit of inspiration, the video below showcases the latest Ultimate Bi-Fold Door along with Marvin's other scenic door offerings:

Thank you for considering Marvin products for your project!