By Genie from Atlanta, GA on September 17, 2014
Does it matter which side is Length and which side is Width?
By eFireplaceStore on September 18, 2014
Answer:It does not. However, just so we have a reference between the two, there are longer lengths available than widths. The industry standard defaults the length as being greater than the width.
By Aaron from VT on November 27, 2015
How much do the mounting flanges add to the length and width of this Multi-flue semi-custom Gelco chimney cap? I would like a cap that covers as much of the chimney crown as possible but still want to have room for screws.
Also, how do I remove the cap for cleaning? Remove the tapcons?
By Will M. on November 27, 2015
Answer:The cap will arrive with 3/4" reversible swing tabs at the base for securing the cap to the crown via inside or outside mounting, depending on preference. This is not removed for cleaning and will stay secured to the crown. For cleaning, the lid can be quickly removed by unbolting the cap screws that hold it in place.
By Kermit from Chilhowie, VA on September 18, 2015
My chimney is 50 inches long and 21 inches wide with the liners being 5 inches high. What size of this Multi-Flue Semi-Custom Gelco chimney cap do I need? Do I need to leave a space on all side for the attachment?
By Will M. on September 21, 2015
This cap would mount to the surface of your crown in between the outer diameter of your 5" tall flue tile and outer diameter of the crown. As the lid would need to be 5" higher than the tallest flue tile, you would need to purchase the Multi-Flue Semi-Custom Gelco Chimney Cap - 12" High Mesh.
By Susan from Urbana, Ohio on July 29, 2014
How does this connect to the chimney? I need one that goes over the entire chimney down to the stack, on a masonry ledge. It is 22.5 x 40. Will the 40 x 23 be workable?
By eFireplaceStore on July 29, 2014
Answer:The 40 x 23 will indeed be the closest size to your needs. These caps mount to the surface of the chimney crown by using the hinged mounting tabs that run the entire length of the screen perimeter. The tabs can be swung inward on the narrow side to accommodate the slightly smaller dimension that is needed. The only other option would be to use a fully custom cap with a perimeter mounting flange.
By Fred from North Myrtle Beach, SC on October 2, 2015
I am near the coast and high winds are a real possibility for us. If installed in the crown per instructions, would this Multi-flue semi-custom Gelco chimney cap stand up to high winds?
By Will M. on October 6, 2015
Answer:Per the manufacturer, this is relative to what is being referred to as "high winds." This product will stand up to high winds, but they cannot guarantee that the product will stand up to hurricane-force winds.
By Steve from Johnson City, TN on September 19, 2016
My flues do not extend above the crown. Does this cap mount directly to the chimney crown?
By Will M. on September 20, 2016
Answer:This would indeed get mounted to the chimney crown surface via the reversible 3/4" swingtabs located at the base for inside or outside mounting.
By Steve from Warwick, RI on July 1, 2015
I am interested in this Multi-flue, semi-custom Gelco chimney cap and I want to make sure that I get the correct size. The inside measurements of my chimney are 14" x 26" and the outside dimensions are 25" x 36". What would you recommend?
By Will M. on July 1, 2015
Answer:You will need to select a cap that is larger than the outside dimension of the flue tile, but smaller than the outside of the flat chimney surface. Basically, you will need to select a cap in the range of 14"-25" W x 26"-36" L. As the surface is nearly flat and does not taper, I would recommend choosing a size closer to the outside dimension of the chimney.
By Tommy from Greenville,SC on September 29, 2014
At the top of the chimney I have 3 flumes, 2 of which are not being used. The outside dimensions of the flume is 13 wide by 42 long. From the selection, I see that I can get a 13 x 44 and I was curious if that would work for my situation?
I was also curious about the recommended height. I only have gas logs, so there should not be any ashes going up the chimney. Would the 8 inch high be the recommended option for me?
By eFireplaceStore on September 30, 2014
Answer:For better coverage, it is recommended to select a cap that is at least an inch larger around than the outside measurements of the flue tile. As such, your 13 x 42 flue would be best covered with a 15 x 44 cap.
The lid of the cap should be at least 5 inches above the top of the flue tile, regardless of the type of appliance the chimney is venting. As such, you will need to verify how far above the chimney crown the flue tile projects. If it is 3 inches or less, an 8 inch cap could work.
By Ryan from ME on October 13, 2014
I'm interested in this cap and I was just wondering when selecting the length and width what is it referring to? The top with the 2.5 in overhang or the bottom where its bolted? My overall size of the chimney is 19.5"x35.5". I want to bolt it down a few inches smaller than that but i want to make sure its right before I order it.
By Will M. on October 13, 2014
Answer:This is a surface mount cap and the length and width are the dimensions of the base. The base has 3/4" swing tabs that can be either inside or outside mounted. Your preferred dimensions should be slightly inwards of your outer dimensions to accommodate for the 3/4" swing tabs.
By Kent from Eugene, OR on December 9, 2014
Can I mount this cap to a chimney with red tile flues that run 3" above the actual masonry chimney? Will I have to drill into the flue? I am covering two active flues which together measure 33"X13" and I am wondering if that is the correct size to order.
By Kevin E. on December 9, 2014
Answer:This cap is designed to fit around your terracotta flues and mount straight down to the top of the masonry chimney. As such, you'll want to order a cap that is sized slightly larger than the 33"x13". These caps are indeed normally installed with masonry fasteners. So, some drilling may be required. You have selected the right height for your 3" flue. The best fit is to have the lid of the cap at least 5" above the top of the flue.
By David from Oberlin, OH on October 13, 2014
My chimney measures 45 1/2 inches by 22 inches. The three flues are inside the chimney and they don't protrude. What kind of a cap do I need to keep the rain from getting in and how is this cap mounted?
By eFireplaceStore on October 14, 2014
Answer:For your application, I recommend using a top mounted cap that is slightly smaller than the overall chimney size. For example, a 21 by 44 cap would be ideal for your needs. The 8 inch mesh height will be good for your application. Sizing the cap to the size of the chimney itself will offer maximum overhang and coverage. The cap is anchored by drilling into the chimney crown and installing anchors. You can then fasten the cap by using the included mounting strips.
By Dave from Los Angeles, CA on June 19, 2015
I have a brick chimney measuring 22.5 X 31.5 X 12. Is it necessary to fit this Multi-Flue semi-custom Gelco chimney cap exactly to size? How exactly is this cap installed?
By Will M. on June 19, 2015
Answer:This cap mounts to the surface of the chimney crown in between the outer diameter of the crown and the outer diameter of the terracotta flue that protrudes from your chimney. Subsequently, you should choose a size that is slightly smaller that the outer diameter of the chimney crown, but larger than the outer diameter of the terracotta flue. The multi-flue caps we carry mount to the chimney using perforated mounting strips. The cap should be set in position for test fitment first. You should then mark several mounting points on the concrete wash through the perforations. Your mounting points should be evenly spaced and I recommend two anchor points on the long side of the cap and one on the ends. The cap should then be set aside and a hammer drill with a masonry bit should be used to drill into the wash. You can then installed plastic anchors and set the cap back in position over them. You will then need to run anchor screws through the strips and into the anchors you installed.
By David from Kilgore, TX on October 25, 2015
My chimney structure is quite a bit larger, 24 x 18 inches, than the flue opening, 12 x 9 inches. I'm looking at the picture of the cap and it appears that the frame mounts from the inside and it does not have to cover the chimney completely. Is this true?
By eFireplaceStore on October 26, 2015
This style of cap actually uses reversible hinged mounting tabs that can be swung inward or outward. You are exactly correct that the cap does not have to cover the entire chimney crown, but more coverage offers greater protection and looks the most proportional. A good photo representation of a cap splitting the difference between the flues and crown edges is the Gelco Model C 17 in. x 29 in. Base Stainless Steel Multi-Flue Chimney Cap
By Dewey from Johnstown, PA on April 18, 2016
How do I measure which size of chimney cap is needed? I have a double flue chimney, the ID is 33" x 21", the OD is 40" x 28". The flue does not extend above the top of the chimney.
By Will M. on April 19, 2016
Answer:Please note that both local and national code will require the flue to extend 2" above the crown, splay or wash, but I recommend choosing a size slightly less than the 40" x 28" outside measurement of your crown to provide the greatest protection from rain and to prevent downdraft. The 27" x 37" measurement with a standard overhang and standard mesh should work quite well.
By Jim from Chatham, MA on December 6, 2014
I am looking into installing a chimney cap on a house in Chatham, MA. There are three flues. The main flue is for the fireplace, which has been converted from a wood to a gas fireplace. One is for the NG forced hot air furnace and the third is for the hot water heater. As you can see, the three flues are almost touching each other and are not aligned. My preliminary dimensions were flues at 8"x 8.25" for the smaller flues and 12.75"x12.75" for the larger flue. An initial measurement with a tape for a multi-flue rectangle was 28.625" x 18.5". However, I did not use a square or t-square to see if the outer dimensions were actually square. Can you advise or recommend what options I have and any concerns about how to better measure the "rectangle" and what method you would use to attach a chimney cap to this chimney?
By eFireplaceStore on December 8, 2014
Answer:In order to take accurate measurements, it is best to first measure diagonally across the chimney from point to point. If the measurement is the same from diagonal to diagonal, the chimney is square. You can then measure inward from each side to determine how far in the cap edges will need to be from the edge. Those measurements will then be subtracted from the overall width and depth of the chimney wash.
The multi-flue caps we carry mount to the chimney using perforated mounting strips. The cap should be set in position for test fitment first. You should then mark several mounting points on the concrete wash through the perforations. Your mounting points should be evenly spaced and I recommend two anchor points on the long side of the cap and one on the ends. The cap should then be set aside and a hammer drill with a masonry bit should be used to drill into the wash. You can then installed plastic anchors and set the cap back in position over them. You will then need to run anchor screws through the strips and into the anchors you installed.