Opposed blade or Parallel blade control construction? Are there blade and edge seals on the damper? This will impact the proper selection as the seals add resistance requiring more torque. If unknown, use a worst case scenario, parallel blade with seals. For the damper in question, what does the manufacturer specify as the torque rating? What is the air velocity, static pressure, or design CFM? System above 1, FPM required additional actuator torque.
What is the supply voltage to the actuator? What is the control signal to the actuator? Consider the …MFT actuator product range and the flexibility of its application. Can you direct couple to a damper shaft? Direct-coupling has become the industry standard. Some retrofit applications do not allow direct coupling. Are there additional accessories required? For example, some applications require the addition of an auxiliary switch for proof of position; a retrofit application may require an additional mounting bracket and linkage kit.
We advise that you identify these needs prior to leaving the job site or ordering products. What is the total area of the damper? Is fail-safe actuation required? Subscribe to Blog Updates. Follow Me. Latest Posts.If you have a fireplace in your home, you have the most popular amenity that people hope for when buying a new residence. Fireplaces can be breathtakingly beautiful, and enjoying a fire on a cold day can be the best part of winter.
All of the potential enjoyment of a fireplace is partially dependent upon proper chimney and fireplace sizing. Proper venting is of utmost importance, to ensure that toxic combustion by-products go outside and not inside the home. Installation of wood stoves and other vented heating appliances must be done correctly, to ensure proper operation and safety.
For that reason, home insurance policies often specify that professional installation is required, if damage caused by failure of a heating unit is to be covered in a policy. Metal or pre-fabricated chimneys, which most home builders are partial to, use a different type of venting than a masonry fireplace.
It is essential that the venting for any type of wood-burning fireplace or stove include a flue of the appropriate diameter for the appliance. A chimney that is 6 inches in diameter has a In comparison, a inch chimney size provides a cross section of inches through which to vent smoke. The way wood stoves and fireplaces work, a correct match on fitting the flue size to the appliance is a must. As a general rule, the diameter of the chimney should match the flue collar on your wood stove.
Wire Gauge Size Chart
A 6-inch stove requires a 6-inch flue. In most cases, a step up is also fine. For example, you could vent a 6-inch stove into an insulated chimney that is 8 inches in diameter. If, however, the flue is more than three times the size of your stove outlet, the problem that will likely be created is that the smoke cools excessively and therefore fails to exit properly.
This scenario also results in the formation of an excess amount of creosote. Our professionals typically recommend installing a stainless steel flue lining that is the same size as the stove outlet, to solve the problem of an inadequate draft. When a home is built with a masonry fireplace, there is a huge range of possible sizes.
Each element of the construction of the fireplace and chimney contributes to venting. The height of the chimney, the size of the flue, smoke chamber construction, and other components work together to either ensure a strong draft or detract from it. Contact our chimney professionals when you are ready to have a new and efficient wood-burning fireplace or wood stove installed in your home. You will be able to rest assured that the flue is the right size, the appliance will be safe to use, and it will operate correctly.
Does your Chimney System Need a Makeover? Wood Fireplaces: Which is best for you? Has My Chimney Had a Fire? How Does a Chimney Work?
How Much Firewood is in a Cord? What Is Chimney Coping? What is Chimney Spalling? What Services do Chimney Sweeps Provide?As we celebrate 90 years in the industry, Pottorff remains committed to delivering high performing products on time and at competitive prices. We offer a full line of:.
Our in-house laboratories allow us to streamline product development and enhance our current product offerings. We are active participants in the development of building codes, design regulations and test standards with industry organizations. LIST is a state-of-the-art web program that allows engineers and architects to select the right louver based on application and performance criteria. Search By Model. Pottorff Product Catalog As we celebrate 90 years in the industry, Pottorff remains committed to delivering high performing products on time and at competitive prices.
Pottorff In-House Testing Our in-house laboratories allow us to streamline product development and enhance our current product offerings. Industry Leadership We are active participants in the development of building codes, design regulations and test standards with industry organizations.
Louver Information and Selection LIST is a state-of-the-art web program that allows engineers and architects to select the right louver based on application and performance criteria.InspectAPedia tolerates no conflicts of interest.
We have no relationship with advertisers, products, or services discussed at this website. To provide adequate draft and safe venting of combustion products the chimney flue for a fireplace has to be adequate in size or cross-sectional area.
According to the Masonry Institute of America, the required flue size for masonry fireplaces burning wood is basically a function of the area of the fireplace opening. Note that "chimney height" for the purpose of determining fireplace requirements, is measured not from the ground outside nor from the "floor" of the fireplace hearth. Rather you should use the distance from the fireplace throat to the top of the chimney.
Don't include the chimney cap in height measurements - that added distance does not develop draft in the flue. For this reason, fireplace and chimney guides offer a table of effective chimney vent area measured as a cross-section of the flue opening and flue sizes. To use the fireplace chimney flue sizing table below, calculate the area in square inches of the cross section of the inside of the fireplace opening. For a rectangular fireplace opening just multiply its width by its height in inches to calculate the value to look for in column A of the table.
These square inch areas were calculated by MIA based on common masonry fireplace widths and heights in inches; the effects of variations in fireplace depth, shape, and extent to which the fire-box follows optimum design principles were not considered. We have not determined what MIA means by "oval" fireplace flues when both dimensions are equal.
MIA notes that in a masonry wall some masons construct a single lined flue and leave the left flue unlined with 8" of space in the wall for added venting.
Fire safety of this design relies on solid masonry construction and may not be code approved in all jurisdictions. Armhein, S. Aug 14, Robert said: When adding support brace under hearth should new footing be poured to support brace and weight. If your floor slab is 4" or thicker, you should be OK with placing supporting columns below the hearth right onto the slab surface.
If the floor slab is thinner than 4", if it already shows signs of settlement, cracks, damage, the best repair is to cut a hole in the slab, excavate and pour a footing or pier for your columns, typically using a cardboard tube or form for the pier. An alternative that I used in many building renovations of older homes where we needed to support an additional Lally column in a basement where the floor slab looked "OK" but was of unknown thickness, was to bed a solid 4" concrete block in concrete right onto the floor surface.
The block served as a footing or pier for the column and helped spread the load out onto a wider area than otherwise had we just put the Lally column base right onto the floor itself. Nov 4, Jim Jackson said: I had a chimney fire last wintwer and immediately putit out. After that I have noticed that the heatalator that is built in does not work Jim I don't know what your homeowner's policy covers - you'll need to call your insurance company to ask.
But it makes sense to have an inspection of the system for two reasons. Frankly, after a chimney fire I would never use that chimney again without first having an expert and thorough inspection of the entire assembly.
Nov 21, Dee said: I have a glass plate hearth on top of an oak floor and under my log burning stove. It is about 18 months old now. Over the last few months the wood floor underneath the clear glass hearth has started to darken and grow mold.
Type C Sizing Chart
Now I have droplets of water under the glass and this is clearly where the mold is coming from. What can be causing this? The rest of the wooden flooring is fine, with no mold or dampness even under rugs. I'm not sure where it's coming from, but if you are seeing mold growth there has to be a moisture source. Are you sure it's mold?Fireplace design details can be found in this amazing book.
The firebox must be shaped and sized perfectly so it doesn't smoke. A fireplace will puff smoke into a room if its design is flawed. The physics of smoke rising into a chimney is complex and several things must be done right so all the smoke from the fire exits your home.
It's important to realize there are three aspects of fireplace design you should be concerned about. The first is the inner shape and design of the firebox where the fire burns fireboxthe hidden smoke shelf area above the firebox, and the flue that rises up and through the roof. Here's the fireplace once finished. Maggie and her daughter did a magnificent job and the hydrated lime will look this good for decades.
Copyright Tim Carter. All you need to know is below. Stone fireplaces can be very durable. Granite and many other dense stones can make a gorgeous outer face of your fireplace.
Here's one I saw in Southwest Harbor, Maine. This is a stunning fireplace made with real stone. The colors of the stones really make it visually attractive. The mason did a magnificent job of shaping the stones so they fit like pieces of a jigsaw puzzle. The second design consideration is what the fireplace looks like to those who look at it while in the room. If you need inspiration and want to see stunning photos of some fantastic fireplaces, then order Fire Places: A Practical Design Guide for Fireplaces and Stoves.
I recommend you read these three things:. Watch this short video to see properly sloped firebox brick:. The best fireplace design dimensions are the ones that ensure your fireplace will not smoke. The Brick Industry Association is perhaps the most respected source of fireplace design criteria in the world.
Be sure your mason builds your fireplace according to the values in the following table. All the data is courtesy of the Brick Industry Association.Leaking or sticking dampers can ruin your system balance and energy efficiency. We are a wholesale distributor and do not sell directly to the general public. Powered by All rights reserved. Your order is empty. View order. All departments Actuators, Electric. Actuators, Electric. Barber Colman-Schneider Electric Actuators. Honeywell Electric Actuators.
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Damper Maintenance Checklist
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Champion Air Compressors. Champion Industrial Air Compressors. Condensate Drains. Champion Medical Air Compressors. Quincy Air Compressors. Hankison Refrigerated Air Dryers. Champion Rotary Screw Air Compressors. Controllers, HVAC.In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them.
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A quick overview of the changes is provided in the front of this manual. Meanwhile, a Committee has already begun work on what will be either addenda or a new edition.
Subjects being investigated are ribbed round duct, fatique testing of tie rodded metal, new flat oval duct standards, duct liner pin lengths, more double wall casings, sealant specifications and more performance specifications for joints and reinforcements. And, indirectly related to these standards, significant progress is being made by major mechanical code writing agencies in developing one uniform, consensus-supported code for the entire nation. SMACNA expresses appreciation to the many who have offered suggestions for constructive improvement in the fabrication and installation of duct systems.
Suggestions for future improvement are welcome. Special thanks is given to those who volunteered their time, gave their special knowledge and struggled with development of a consensus that would reflect the needs of a diversified industry.
ASTM C —Specification for Adhesives for Duct Thermal Insulation Flammability, smoke development, bond strength, flash point, moisture and temperature effects, edge burning characteristics. This document or publication is prepared for voluntary acceptance and use within the limitations of application defined herein, and otherwise as those adopting it or applying it deem appropriate.
It is not a safety standard. Its application for a specific project is contingent on a designer or other authority defining a specific use. SMACNA has no power or authority to police or enforce compliance with the contents of this document or publication and it has no role in any representations by other parties that specific components are, in fact, in compliance with it.
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The Board of Directors of SMACNA shall have final authority for interpretation of this standard with such rules or procedures as they may adopt for processing same. Any Standards contained in this publication were developed using reliable engineering principles and research plus consultation with, and information obtained from, manufacturers, users, testing laboratories, and others having specialized experience. They are subject to revision as further experience and investigation may show is necessary or desirable.
Construction and products that comply with these Standards will not necessarily be acceptable if, when examined and tested, they are found to have other features which impair the result contemplated by these requirements. Authorities considering adoption of any standards contained herein should review all federal, state, local and contract regulations applicable to specific installations. Nonexclusive, royalty-free permission is granted to government and private sector specifying authorities to reproduce only any construction details found herein in their specifications and contract drawings prepared for receipt of bids on new construction and renovation work within the Untied States and its territories, provided that the material copied is unaltered in substance and that the reproducer assumes all liability for the specific application, including errors in reproduction.