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DUCT SYSTEM & DUCT DEFECTS
AIR FILTERS for HVAC SYSTEMS
AIR FLOW IMPROVEMENT, HVAC
AIR FLOW MEASUREMENT CFM
ALLOY SYSTEMS FLEXDUCT
ASBESTOS DUCTS, HVAC
ASBESTOS PAPER on DUCTWORK
ASBESTOS TRANSITE DUCTWORK
BALANCING AIR DUCT FLOW
DUCT & AIR HANDLER ODORS
DUCT in CONCRETE FLOOR
DUCT DAMAGE, MECHANICAL
DUCT INSULATION - Asbestos Paper
DUCT ROUTING & SUPPORT
DUST, HVAC CONTAMINATION STUDY
FIBERGLASS DUCT, RIGID CONSTRUCTION
FIBERGLASS HVAC DUCTS
FIRE & SMOKE DAMPERS, AUTOMATIC
FLOOD DAMAGE in DUCT WORK
GOODMAN GRAY FLEXDUCT
INCREASING RETURN AIR
LEAKY DUCT CONNECTIONS
LOCATION OF REGISTERS & DUCTS
MOLD in AIR HANDLERS & DUCT WORK
NOISES in DUCT SYSTEM
ODORS in AIR HANDLERS & DUCT WORK
OWENS CORNING FLEXDUCT
RETURN AIR REGISTERS & DUCTS
RETURN DUCT AIR LEAKS
SOUNDPROOFING for DUCTWORK
SUPPLY DUCTS & REGISTERS
SUPPLY DUCT AIR LEAKS
TRANSITE PIPE AIR DUCTS
UNDERSIZED RETURN DUCTS
UNSAFE DUCT OPENINGS
WATER & ICE IN DUCT WORK
WET CORRODED DUCT WORK
ZONE DAMPER CONTROLS
Fiberglass insulating duct board:
This article discusses the use of rigid insulating board to construct air conditioning and heating system ductwork, and use of rigid ductwork with a thermosiphoning air collector system (TAP).
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The question-and-answer article below paraphrases, quotes-from, updates, and comments an original article from Solar Age Magazine and written by Steven Bliss.
Question: How are Rigid-Insulation Ducts Constructed, What Materials & Tools are Used?
I have heard that rigid insulating board can be used to construct heating ducts (or air conditioning ductwork). Can you provide information about the construction of rigid insulating board ductwork, including duct construction tools, etc.?
Is it reasonable to use rigid duct board with a thermosiphoning air collector (TAP), considering that I desire to move air 12 to 15 feet from the south wall to the middle of a one-story house?
This thermosiphoning air collector plan also includes using air from the basement to enter the cold side of the TAP. -- Byrl Bowman, Kalamazoo, MI
Answer: Fiberglass Duct Board
The product you refer to is fiberglass duct board, available from Certainteed, Knauf, and Owens Corning.
The fiberglass insulating board panels are one-inch in thickness, R-4.3, rigid-fiberglass panels that have a reinforced kraft paper or foil facing on one side. Rigid fiberglass duct board panels can be cut and fitted on site using a utility knife and special grooving tools to make the folds and laps.
The duct board sections are stapled together and sealed using pressure-sensitive aluminum foil tape.
The duct construction hand tools are made by AmCraft, Inc..
To purchase fiberglass insulation duct board materials, check with the larger heating and air-conditioning supply houses in your area, or with a manufacturer's rep.
As for your plan to use a thermosiphoning air collector, it sounds fine, but don't expect much air flow from a thermosiphoning collector if the system is ducted. A fan will be needed.
Technical Opinion About Rigid Fiberglass Ductwork
Foil faced rigid fiberglass duct board has proven an excellent system for constructing air plenums and main trunk lines for duct systems for both heating and air conditioning, and is in popular use across North America as well as in other countries. -- DJ Friedman
Advantages of Rigid Fiberglass Duct Board
Disadvantages of Rigid Fiberglass Duct Board
Here we include solar energy, solar heating, solar hot water, and related building energy efficiency improvement articles reprinted/adapted/excerpted with permission from Solar Age Magazine - editor Steven Bliss.
The link to the original Q&A article in PDF form immediately below is preceded by an expanded/updated online version of this article.
Continue reading at FIBERGLASS ENVIRO-SCARE or select a topic from the More Reading links shown below.
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Frequently Asked Questions (FAQs)
Question: strange HVAC duct lining materials: plaster
(Jan 3, 2013) Lou said:
Lou this is a design and materials unfamiliar to me: plaster inside ductwork around tubes? Perhaps you can send us some sharp photos and I can comment further.
Question: get rid of ductwork shedding fiberglass
25 Feb 2015 ray said:
If the ducts are damaged internally, say by mechanical cleaning, for example, then the ductwork would simply need to be replaced. my OPINION is that I don't like the spray-coating approach that some techs use in these situations.
Questions & answers or comments about possible sources of small fiberglass fragments found in indoor air & dust samples.
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