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Steam Heat Defects List & Home Inspection Education
POST a QUESTION or COMMENT about home & building inspection courses, standards, & defect checklists for steam heating systems
Steam heat inspection checklist, training course curriculum, defects lists: this article lists significant steam heating systems defects, definitions, and home inspection education topics.
The building defects and inspection points listed in these articles also guide homeowners and home buyers to building areas that merit careful attention and often point areas of safety concern or important maintenance and repair tasks.
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Home Inspection Education Curriculum - Heating, Steam
4.6 Steam Heating System Inspection Requirements & Defects List
4.6.1 Knowledge Base for Steam Heating System Inspection
1. Describe the function of steam heating systems.
2. Describe the advantages and disadvantages of steam heating relative to forced air and hot water heating.
3. Describe one and two pipe steam heating systems
4. Describe the materials and components of steam heating systems including the following: high and low pressure systems, one and two pipe systems, parallel flow or counter flow in one pipe systems, up feed or down feed systems, gravity return and pumped return systems, vapor systems, vacuum systems, burner, fuel delivery system, combustion air supply, vent/chimney, thermostat, distribution piping, radiator, operating controls, safety controls (including safety “pop-off” valve), pressure gauge, air vent on radiator and on pipe, Hartford loop, equalizer pipe, condensate pump, boiler feed pump, backflow preventer, zone control, tankless coils,
5. Describe the features of good installation and repair technique for a steam boiler.
6. Describe the operating cycle for steam heating system from the at rest position to shut down.
7. Define the following terms: latent heat of vaporization, thermostat, pressuretrol (steam pressure limit switch), air vent, dimension A, equalizer pipe, Hartford loop, wet return, dry return, steam trap, thermostatic trap, F and T trap, main vent, receiver, auto water feeder(automatic water makeup), low water cut out, blow down (blow-off) valve, pressure relief valve, water hammer, water level gauge( sight gauge, sight glass), close nipple on Hartford loop.
8. Identify the codes or standards which apply to steam heating in your area(including the fuel system).
4.6.2 Inspection Skills for Steam Heating Systems
1. Describe the inspection procedure for a steam boiler.
2. Identify the common defects listed on the next page.
3. Describe the implication of each defect.
4. Identify safety issues for the inspector and occupant of the home (steam explosion, gas explosion, oil fire, combustion products poisoning occupants, flooding).
5. Communicate findings to client verbally and in writing, recommending corrective action where needed.
STEAM BOILER TYPICAL DEFECTS
Steam Boiler Heat Exchanger Defects
Clogge
Leaks
Rust
Steam Heating System Equalizer Defects List
Clogged
Connected to boiler at wrong location (beyond Scope)
Missing
Too small
Steam Boiler Cabinet Enclosure Defects
Combustible clearance
Mechanical damage
Missing components
Obstructed air intake
Rust
Scorching
Steam Heat Zone Control Defects
Inoperative
Leaking
Note: some steam systems include a hydronic zone on the boiler level or below, and / or a hydonic zone for heating an indirect-fired water heater
These curriculae and building defect lists are based on smilar curriculum documents first prepared by Joe Scaduto, an ASHI member who prepared course material for Northeastern University's Building Inspection Certificate program in 1988, subsequently by DF, InspectApedia's editor, for New York University ca 1988 and later, with others, recommended to ASHI, the American Society of Home Inspectors.
ASHI did not adopt this material though currently that association as well as others offer extensive HOME INSPECTOR EDUCATION material.
The curriculum and lists of defects are informed by additional analysis of the process of home inspection that was developed beginning Calgary, AB for Canadian and U.S. home inspector education and certification examinations in 1997. Other early contributors to home inspection education in the U.S. and Canada include Dr. Jess Aronstein, Alan Carson, Mike Casey, Mark Cramer, John Cox, Dwight Barnett, Douglas Hansen, Rick Heyl, Larry Hoytt, Bill Merrill, Kevin O'Malley, Dennis Robitalille, Keith Peddie, Pat Porzio, Roger Robinson.
Use the Search Box at the top or bottom of these pages to find in-depth information about building, energy savings, and indoor environment inspection, diagnosis and repair at this website.
Watch out: these inspection lists do not list all possible defects for the systems discussed, and not all home or building inspectors will examine all of the items listed here.
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In addition to any citations in the article above, a full list is available on request.
John Cranor [Website: /www.house-whisperer.com ] is an ASHI member and a home inspector (The House Whisperer) is located in Glen Allen, VA 23060. He is also a contributor to InspectApedia.com in several technical areas such as plumbing and appliances (dryer vents). Contact Mr. Cranor at 804-873-8534 or by Email: johncranor@verizon.net
Mark Cramer Inspection Services Mark Cramer, Tampa Florida, Mr. Cramer is a past president of ASHI, the American Society of Home Inspectors and is a Florida home inspector and home inspection educator. Contact Mark Cramer at: 727-595-4211 mark@BestTampaInspector.com 11/06
Roger Hankey is principal of Hankey and Brown Inspections, Winter Park, CO. Mr. Hankey is a past chairman of the ASHI Standards Committee and served in other ASHI chapter and national leadership roles. Mr. Hankey is a National Radon Proficiency Program certified measurement professional and a Level II infrared thermographer. Contact Roger Hankey at: 970-393-6604 - rogerhankey47@gmail.com . Website: www.HankeyandBrown.com
Mr. Hankey is a frequent contributor to InspectAPedia.com.
Arlene Puentes [Website: www.octoberhome.com ] , an ASHI member and a licensed home inspector in Kingston, NY, and has served on ASHI national committees as well as HVASHI Chapter President. Ms. Puentes can be contacted at ap@octoberhome.com
[2] The Steam Book, 1984, Training and Education Department, Fluid Handling Division, ITT [probably out of print, possibly available from several home inspection supply companies] Fuel Oil and Oil Heat Magazine, October 1990, offers an update,
[3] Principles of Steam Heating, $13.25 includes postage. Fuel oil & Oil Heat Magazine, 389 Passaic Ave., Fairfield, NJ 07004.
[4] The Lost Art of Steam Heating, Dan Holohan, 516-579-3046 FAX
[5] Principles of Steam Heating, Dan Holohan, technical editor of Fuel Oil and Oil Heat magazine, 389 Passaic Ave., Fairfield, NJ 07004 ($12.+1.25 postage/handling).
[9] Insulation Systems Used as External Treatment for Control Valve and Regulator Noise, Steve Boyle, FCI, Fluid Controls Institute, web search 02/08/2011, Tech Sheet #CV$#401, 12/20/2003 original source: http://www.fluidcontrolsinstitute.org/pdf/resource/control/CVR401Noise.pdf Quoting: [10] FCI is a trade association
comprising the leading manufacturers of fluid control and conditioning equipment. FCI Tech Sheets are information tools and should not be used as
substitutes for instructions from individual manufacturers. Always consult with individual manufacturers for specific instructions regarding their
equipment.
[11] "Valve Noise Prediction vs. Velocity Head Limitations in Gas Applications", Joseph Shahda, principal engineer, Masonelian-Dresser, Inc., Feb. 2004 [PDF] [copy on file as /heat/Valve_Noise_VelocityHeadLimits.pdf ]
Domestic and Commercial Oil Burners, Charles H. Burkhardt, McGraw Hill Book Company, New York 3rd Ed 1969.
National Fuel Gas Code (Z223.1) $16.00 and National Fuel Gas Code Handbook (Z223.2) $47.00 American Gas Association (A.G.A.), 1515 Wilson Boulevard, Arlington, VA 22209 also available from National Fire Protection Association, Batterymarch Park, Quincy, MA 02269. Fundamentals of Gas Appliance Venting and Ventilation, 1985, American Gas Association Laboratories, Engineering Services Department. American Gas Association, 1515 Wilson Boulevard, Arlington, VA 22209. Catalog #XHO585. Reprinted 1989.
"Residential Hydronic (circulating hot water) Heating Systems", Instructional Technologies Institute, Inc., 145 "D" Grassy Plain St., Bethel, CT 06801 800/227-1663 [home inspection training material] 1987
"Warm Air Heating Systems". Instructional Technologies Institute, Inc., 145 "D" Grassy Plain St., Bethel, CT 06801 800/227-1663 [home inspection training material] 1987
Heating, Ventilating, and Air Conditioning Volume I, Heating Fundamentals,
Boilers, Boiler Conversions, James E. Brumbaugh, ISBN 0-672-23389-4 (v. 1) Volume II, Oil, Gas, and Coal Burners, Controls, Ducts, Piping, Valves, James E. Brumbaugh, ISBN 0-672-23390-7 (v. 2) Volume III, Radiant Heating, Water Heaters, Ventilation, Air Conditioning, Heat Pumps, Air Cleaners, James E. Brumbaugh, ISBN 0-672-23383-5 (v. 3) or ISBN 0-672-23380-0 (set) Special Sales Director, Macmillan Publishing Co., 866 Third Ave., New York, NY 10022. Macmillan Publishing Co., NY
Installation Guide for Residential Hydronic Heating Systems
Installation Guide #200, The Hydronics Institute, 35 Russo Place, Berkeley Heights, NJ 07922
The ABC's of Retention Head Oil Burners, National Association of Oil Heat Service Managers, TM 115, National Old Timers' Association of the Energy Industry, PO Box 168, Mineola, NY 11501. (Excellent tips on spotting problems on oil-fired heating equipment. Booklet.)
Building Pathology, Deterioration, Diagnostics, and Intervention, Samuel Y. Harris, P.E., AIA, Esq., ISBN 0-471-33172-4, John Wiley & Sons, 2001 [General building science-DF] ISBN-10: 0471331724
ISBN-13: 978-0471331728
Building Pathology: Principles and Practice, David Watt, Wiley-Blackwell; 2 edition (March 7, 2008) ISBN-10: 1405161035 ISBN-13: 978-1405161039
Our recommended books about building & mechanical systems design, inspection, problem diagnosis, and repair, and about indoor environment and IAQ testing, diagnosis, and cleanup are at the InspectAPedia Bookstore. Also see our Book Reviews - InspectAPedia.
In addition to citations & references found in this article, see the research citations given at the end of the related articles found at our suggested
Carson, Dunlop & Associates Ltd., 120 Carlton Street Suite 407, Toronto ON M5A 4K2. Tel: (416) 964-9415 1-800-268-7070 Email: info@carsondunlop.com. Alan Carson is a past president of ASHI, the American Society of Home Inspectors.
Carson Dunlop Associates provides extensive home inspection education and report writing material. In gratitude we provide links to tsome Carson Dunlop Associates products and services.