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AFUE DEFINITION, RATINGS
AGE of AIR CONDITIONERS & HEAT PUMPS
AGE of HEATERS, BOILERS, FURNACES
AGE of WATER HEATERS
AIR FILTERS for HVAC SYSTEMS
AIRBOUND HEAT SYSTEM REPAIRS
ANODES & DIP TUBES on WATER HEATERS
ANTIFREEZE for BOILERS
ANTI SCALD VALVES
APPLIANCE EFFICIENCY RATINGS
ASBESTOS IDENTIFICATION IN buildings
BACKDRAFTING HEATING EQUIPMENT
BACKFLOW PREVENTERS, HEAT
BACKDRAFTING HEATING EQUIPMENT
BACKUP HEAT for HEAT PUMPS
BIOGAS PRODUCTION & USE
BLOWER DOORS & AIR INFILTRATION
BLOWER FAN CONTINUOUS OPERATION
BLOWER FAN OPERATION & TESTING
BLUE vs YELLOW COMBUSTION FLAMES
BOILER CHEMICAL TREATMENTS
BOILER COMPONENTS & PARTS
BOILER CONTROLS & SWITCHES
BOILER LEAKS CORROSION STAINS
BOILER LEAKS, HOW TO LOCATE
BOILER NOISE SMOKE ODORS
BOILER OPERATING PROBLEMS
BOILER OPERATION DETAILS
BOILER PRESSURE & TEMPERATURE SETTINGS
CARBON MONOXIDE WARNING
CHIMNEY INSPECTION DIAGNOSIS REPAIR
CHIMNEYS & Flues - Asbestos Transite Pipe
CHINESE DRYWALL HAZARDS
CIRCULATOR PUMPS & RELAYS
COOL OFF HEAT, Thermostat Switch
COMBUSTION AIR for TIGHT buildings
COMBUSTION GASES & PARTICLE HAZARDS
COMBUSTION PRODUCTS & IAQ
COMPLETE COMBUSTION, Stoichiometric
CREOSOTE FIRE HAZARDS
Curved Brick Chimneys - Sulphation
CONDENSING BOILERS/FURNACES DAMAGE
DEFINITION of Heating & Cooling Terms
DIAGNOSE & FIX AIR CONDITIONER / HEAT PUMP
DIAGNOSE & FIX HEATING PROBLEMS-BOILER
DIAGNOSE & FIX HEATING PROBLEMS-FURNACE
DIRECT VENTS / SIDE WALL VENTS
DIRECTORY of OIL TANK EXPERTS
DRAFT HOODS - gas fired
DRAFT MEASUREMENT, CHIMNEYS & FLUES
DRAFT REGULATORS, DAMPERS, BOOSTERS
DUCT SYSTEM & DUCT DEFECTS
DUST, HVAC CONTAMINATION STUDY
DUST SAMPLING PROCEDURE
ELECTRIC HEAT, DIAGNOSIS, REPAIR
ELECTRIC MOTOR DIAGNOSTIC GUIDE
ELECTRIC MOTOR OVERLOAD RESET SWITCH
ELECTRICAL POWER SWITCH FOR HEAT
EVAPORATIVE COOLING SYSTEMS
FAN, AIR HANDLER BLOWER UNIT
FAN AUTO ON Thermostat Switch
FAN, COMPRESSOR/CONDENSER UNIT
FAN CONVECTOR HEATERS - HYDRONIC COILS
FAN LIMIT SWITCH
FILTERS, AIR for HVAC SYSTEMS
FILTERS, OIL on HEATING EQUIPMENT
FIRE SAFETY CONTROLS
FIREPLACES & HEARTHS
FLAME COLOR, BLUE vs YELLOW COMBUSTION
FLOODED HEATING EQUIPMENT REPAIR
FLOODED WATER HEATER REPAIR
FLUE SIZE SPECIFICATIONS
FLUE VENT CONNECTORS
FREEZE-PROOF A BUILDING
FUEL OIL TYPES & CHARACTERISTICS
FUEL UNIT, HEATING OIL PUMPS
FURNACE CONTROLS & SWITCHES
FURNACE EFFICIENCY, HIGH vs MID
FURNACE HEAT EXCHANGER LEAKS
FURNACE OPERATION DETAILS
FURNACE OPERATING TEMPERATURES
GALVANIC SCALE & METAL CORROSION
GAS BURNER Flame & Noise Defects
GAS FIRED WATER HEATERS
GAS PIPING, VALVES, CONTROLS
GAUGES ON HEATING EQUIPMENT
GEOTHERMAL HEATING SYSTEMS
HEAT EXCHANGER LEAK TEST
HEAT LOSS in BUILDINGS
HEAT LOSS DETECTION TOOLS
HEAT LOSS INDICATORS
HEAT LOSS PREVENTION PRIORITIES
HEAT LOSS R U & K VALUE CALCULATION
HEAT PUMPS, DIAGNOSIS, REPAIR
HEAT TAPES & CABLES on Roofs for Ice Dams
HEATING COST FUEL & BTU Cost Table
HEATING COST SAVINGS METHODS
HEATING LOSS DIAGNOSIS-BOILERS
HEATING LOSS DIAGNOSIS-FURNACES
HEATING OIL EXPOSURE HAZARDS, LIMITS
HEATING OIL - OLD, USEABLE?
HEATING OIL PIPING TROUBLES
HEATING OIL SHELF LIFE
HEATING OIL SLUDGE
HEATING OIL USAGE RATE
HEATING SMALL LOADS
HEATING SYSTEM INSPECT DIAGNOSE REPAIR
HEATING SYSTEM NOISES
HEATING SYSTEM SERVICE & MAINTENANCE
HEATING SYSTEM TYPES
HIGH EFFICIENCY BOILERS/FURNACES
HOT WATER HEATERS
HOT WATER IMPROVEMENT
INSULATION INSPECTION & IMPROVEMENT
LOW VOLTAGE BUILDING WIRING
LOW VOLTAGE TRANSFORMER TEST
LP & Natural Gas Safety Hazards
MANUALS & PARTS GUIDES - HVAC
MIXING / ANTI-SCALD VALVES
MOTOR OVERLOAD RESET SWITCH
Natural Gas Combustion Products
NO HEAT - BOILER
NO HEAT - FURNACE
NOISE / SOUND DIAGNOSIS & CURE
NOISE AIR CONDITIONER / HEAT PUMP
NOISE, DUCT VIBRATION DAMPENERS
NOISE, HEATING SYSTEMS
NOISE, WATER HEATER
ODORS GASES SMELLS, DIAGNOSIS & CURE
ODORS FROM HEATING SYSTEMS
OIL BURNER FUEL UNIT
OIL BURNER INSPECTION & REPAIR
OIL BURNER NOISE SMOKE ODORS
OIL BURNER NOZZLE & ELECTRODES
OIL BURNERS, RETENTION HEAD
OIL FUEL TYPES & CHARACTERISTICS
OIL HEAT FIRE SAFETY CONTROLS
OIL LINE CLOGGING FIX
OIL LINE QUICK STOP VALVES
OIL LINE SAFETY VALVES
OIL ODORS, LEAKY OIL TANK PIPING
OIL PUMP FUEL UNIT
OIL SPILL CLEANUP / PREVENTION
PLASTIC HEATER VENT
PULSE COMBUSTION HEATERS
PRESSURE REDUCING VALVES
PRESSURE REGULATOR, WATER
PUFFBACKS, OIL BURNER
PUMPS, PONY PUMPS
RADIANT HEAT Floor Mistakes to Avoid
RADIANT HEAT TEMPERATURES
RADIANT SLAB FLOORING CHOICES
RADIANT SLAB TUBING & FLUID CHOICES
REFRIGERANTS & PIPING
RELIEF VALVE LEAKS
RELIEF VALVES - TP Valves on Boilers
RELIEF VALVES - STEAM TP VALVES
RELIEF VALVES - Water Heaters
RELIEF VALVES - Water Tanks
Reset Switch - Heater Primary Control
Reset Switch Broken - Quick Repair
RESET SWITCH - ELECTRIC MOTOR
Reset Switch - Stack Relays
SAFETY, HEATING INSPECTION
SAFETY RECALLS, Chimneys, Vents, Heaters
STACK RELAY SWITCHES
STAIN DIAGNOSIS on BUILDING INTERIORS
STEAM HEATING SYSTEMS
Thermal Expansion Cracking of Brick
THERMAL EXPANSION of HOT WATER
THERMAL EXPANSION of MATERIALS
THERMAL IMAGING, THERMOGRAPHY
THERMAL IMAGING MOLD SCANS
THERMAL MASS in BUILDINGS
THERMAL TRACKING & HEAT LOSS
THERMOSTATS, HEATING / COOLING
Transite Pipe Chimneys & Flues
VIDEO GUIDES: Heating System Videos
VIDEO GUIDES - InspectAPedia.com
WATER HEATER SAFETY
WATER HEATERS for HOME HEATING USE?
WATER HEATER NOISES
WATER HEATER SCALE - De-Liming Procedure
WATER HEATER SCALE PREVENTION
WINTERIZE A BUILDING
WOOD, COAL STOVES & FIREPLACES
WOOD STOVE SAFETY
Age of heating equipment & Systems: how to determine the age of your heating system and components. Here we provide several excellent sources for de-coding the data tag information on heating equipment. This article provides documents that explain and translate all of the data found on information tags and stickers used on heating & heat pump equipment, including equipment age, heating capacity, electrical requirements, and operating characteristics.
Green links show where you are. © Copyright 2013 InspectAPedia.com, All Rights Reserved. Author Daniel Friedman.
Heating System Equipment Age - 3 Guides for Reading HVAC & Water Heater Equipment Data Tags & Serial Numbers
HVAC data tag decoding: For help in decoding air conditioner, boiler, furnace, heat pump, water heater data tags and determining the age, model, or specifications of that equipment, see AGE of AIR CONDITIONERS & HEAT PUMPS, and AGE of HEATERS, BOILERS, FURNACES, and AGE of WATER HEATERS. There we provide documents with extensive equipment data tag decoding information. This website answers most questions about all types of heating systems and gives important inspection, safety, and repair advice.
If you don't know what kind of heat your building uses, we explain how to figure out the answer at HEATING SYSTEM TYPES. If your heating system is not working properly, see NO HEAT - BOILER or NO HEAT - FURNACE.
We provide links to individual manufacturer's data tag decoding guides (Lennox, below), and to two excellent equipment data tag decoding books, by Scott LeMarr (online at this website) and the Carson Dunlop & Associates Ltd. Technical reference - the most extensive such document we've found.
For many heating or cooling equipment manufacturers, especially after 2000, decoding the equipment tag to obtain the age of the device is pretty easy. Here is the data for Peerless Heating Boilers: If the boiler was manufactured from 1984 to 1999, the serial number ends in a four digit date code. “123456-1284” would be manufactured in December, 1984. If the boiler was manufactured from 2000 to present, the serial number ends in a six digit date code. “123456-200505” would be manufactured in May, 2005.
1. Lennox HVAC products Age: see our Lennox Heater & Air Conditioner Model & Serial Number Decoding Guide at this website. Also see
2. Furnace Age Chart provided by home inspector Scott LeMarr has generously shared his Furnace Age Chart document that decodes both furnace age and water heater age for many brands of water heater, including hot water systems produced by the following manufacturers. The LeMarr document is accessible free, online at Furnace Age Chart in .pdf form. (Use the "BACK" button on your browser to return to InspectAPedia.com.
LeMarr's document provides decoding data for the following manufacturers: Ambassador water heaters, American water heaters , ACE water heaters, A.O.Smith water heaters, Apollo, Aqua Temp, Aqua Therm, Best water heaters, Bosch water heaters, Bradford White, Cafos, Champion, Crosley, Energy Saver, Envirotemp water heaters, GE water heaters, Glascote water heaters, Golden Knight water heaters, GSW, Hotpoint water heaters, JC Penny, Jetglas, JW or John Wood, Kenmore water heaters (Sears Brand), Lochinvar, Lowes, Mainstream, Maytag water heaters, Montgomery Wards, Knight, PermGlas, Reliance water heaters, Revere, Rheem water heaters, Rheem/Rudd/Richmond water heaters, Rinnai, Security, Shamrock water heaters, Standard water heaters, State/Reliance/Sears brand water heaters, Thermo-King, Vanguard water heaters, US Craftsmaster, US Water Heaters, and Whirlpool water heaters.
Carson Dunlop Associates' Technical Reference Guide (below) provides the most extensive HVAC equipment data tag decoder & other information to determine the age of boilers, furnaces, water heaters, air conditioners, and heat pumps by decoding the product serial number.
Manufacturers & brands of HVAC Equipment and Parts identified and decoded in the CDA Technical Reference Guide include about 128 different brands of equipment sold in North America
Aaon, Inc., Ack-O-Matic ,Aero Burners, Aero Environmental, Airco, Airtemp and Tempmatic, Aitons' Equipment - APCO, Allanson Transformers, Amalgamated Electric, Amana, American Standard, American Standard Water Heater Group, Amtrol, Anthes, APCO, ARCO Air, Arkla Industries, Armstrong Air Conditioning Co., S.A. Armstrong, Baltimore Aircoil of Canada, Bard, Bell & Gossett, Borg-Warner, Bradford White, Bristol Compressors, Bryant manufacturing Co. of Indianapolis, Buffalo Package Equipment, Bulloch, Burke Water System Industries, Burnham Corporation, Canadian Tire Corporation, Carlyle Compressor Company, Carrier, Chromalox Canada, Chrysler, Clare Brothers, Clare Mega Save, Clare HECLA, Clawsey-Sohrt Manufacturing Co., Climate Control Products, Climate Master, Climatrol, Coleman, Comfort Aire, Copeland, Copelaweld Compressors, Crane, Davie Environmental Equipment, Day-Nite, DMO Industries, Ducane Heating Division, Dunham Bush, Duomatic, Economite, Elect-Aire, Electric Apparatus COmpany, Elliot, Emerson Electric Company, Enmar Enmar Systems, Envirotron, Esso, Evcon Industries, F.P. Industries, Fairbanks Morse, Fedders, Fess, Findlays Limited, Flamemaster, Fleetline, Florida Heat Pump Manufacturing, FMC Corporation, FP Industries, Franklin Electric Company, Frick, Friedrich, Frigidaire, Frigiking, Fuel Master Burners, G.M.L. Manufacturing, GSW Inc., Galais Manufacturer, Galaxy Boilers, General Controls (ITT), General Electric, Gilbarco, Gilbert and Barker, Goettl, Good Cheer, Goodman, Grimsby Stove and Furnace Ltd., Heat Controller Inc., Heil, Hill York, Hitachi, Homart, Honeywell, Howard Furnace and Boilers, Howell Electric Motors Company, Hydrotherm Inc., I.C. Burners, ITT, Inglis, Inter City Gas (I.C.G.), International, International Comfort Products, Intertherm, Iron Fireman, Janitrol Heating and Air Cooling Conditioning, John Wood Co., Johnson Air Ease, Keeprite, kenmore, Koldwave, Kool-Fire, LG, The Arthur S. Leitch Co., Lennox Industries, Lincoln, Louis Allis Company, Luxaire, Magic Chef Air Conditioning Co., Mgnatec, Marathon Electric, Marcus Transformer, Marley Cooling Tower, Marvair, McLary, McQuay International, Mestek, Metzger, Metropolitan Oil and Gas Industries, Mid Continent Metal Products Co., Miller, Mitsubishi, Modine, Mueller, N'Furno, Nordyne, Norseman Boilers, Oakwood Iron Works (OIW), Olsen, Payne, Pendell Boiler Ltd., Philco, Powermatic, Precision Boilers, Preston, Pyreco, Raypak or Raypak, RBI Water Heaters, Refcan, Reznor ITT, Rheem, Roberts Gordon, RUUD, Sanyo, SJC Corporation, Scarboro Pump Manufacturing Co., Sears, Sears Roebuck, Severn Boiler, Simpsons-Sears, Shell, Singer, Slant Fin Ltd., A.O. Smith, H.B. Smith Co., Smith Boilers, Snyder General Corp., Spacepak, Spencer Boilers, State Industries, Sterling HVAC Products, Sun Dial Manufacturing Inc., Sunscan Compressors, TACO (Canada), TACO, Tappan, TECO, Techumseh Compressors, Teledyne Laars, Tempmatic, Temprite, Tempstar, Thermo Pride, Trane, Typhoon, Unitary Products, viessman, Viking, Warden King, Water Furnace, Watts Regulator Co., Weben jarco, Weil-McLain, Westinghouse, Whirlpool, White-Rodgers, Wood, Worthington Air Coils Ltd., York - Borg Warner.
Frequently Asked Questions (FAQs) about determining the age of heating boilers, furnaces, equipment.
Question: Age of Magic Pack HVAC
how old my magic pack hvac have no idea, i have model# and serial # the is old - Charlie 10/9/11
in the references section below we include links to some serial number decoding guide books that may be able to help you pinpoint the age of your Magic Pack HVAC system - the year is coded in the serial number.
Question: Need a rating plate for a CWF Duo-Matic Forced Air Coal & Wood Furnace
I have a CWF duo matic forced air coal and wood furnace. I have a serial number but I need a rating plate number for insurance purposes and the numbers are no longer legable. How can I get this? - Jen 10/29/11
Yours is probably an Olsen Coal/Wood - Oil forced warm air system. The CWF is more likely a model number.
But I think if your equipment is old, you may be out of luck finding anyone at the present company who knows a thing about it. Just look at the brand name history given below.
You might get some help from wood heat suppliers who I found still sell spare parts for Olsen coal/wood furnaces, such as at woodmanspartsplus.com though the parts I saw looked a bit generic. You will find help with estimating BTU output of wood fired heaters and furnaces at a variety of wood heat organizations.
It's no surprise that tracking down the current company selling or servicing older HVAC equipment is difficult. Look at this example: Olsen's product line originated in the 1940's. Olsen's combination heater line was purchased by DMO Inustries (previously known as Duomatic-Olsen, then as Olsen Technology). DMO Industries manufactured two brands of furnaces, Olsen and Airco. Those were sold in 2001 to ECR International (formed in 1999) who now owns Olsen, Airco as well as the Oneida Royal furnace brands, Utica and Dunkirk boilers as well as Enviromaster International central air conditioners.
You wont' find information about any combination fuel heaters in their current product line, thouigh for Olsen products more information may be available from Olsen/Airco at Olsen/Airco Heating & Cooling Products - USA P.O. Box 4729 2201 Dwyer Ave., Utica, NY 13504, Website: www.olsenhvac.com/ Their customer service number is 866-847-6656.
Question: Determine the age of an HB Smith gas fired boiler
how can I tell the age of my gas boiler?
Reply: History of the H.B. Smith Boiler Company
Joe you gave us a model number but no serial number. Because models are manufactured over a number of years the equipment age is encoded in its serial number not its model number. Take a look on your data tag:
HB Smith boiler data tag decoding: (pattern not verified)
In the serial number the second and third digit from the left are usually the year. E.g. from Carson Dunlop's Technical Reference,
A82-2248 would translate to year of manufacture 1982
HB Smith water heater data tag decoding:
In the serial number, begining with a letter (indicating the wate heater model), the next two digits from the left indicate the year of manufacture just as the boiler serial number above.
Carson Dunlop, Associates, Toronto, have provided us with (and we recommend) Carson Dunlop Weldon & Associates' Technical Reference Guide to manufacturer's model and serial number information for heating and cooling equipment
In Canada H.B. Smith Co., Ltd. is in Ville de Boisbraid, QU, previously located in Point Clair QU. The parent company is the U.S. firm below.
In the U.S., you can locate the H. B. Smith Company, Inc.., 47 Westfield Industrial Park Road, Westfield, MA 01085, Tel: (413) 568-3148 offers this company history at their website http://www.hbsmith.com/
I have a Spencer boiler Number 6070 4 Series R550. How can I find out its date of manufacture? -Jay Levy 12/30/11
Jay, Joe, and Charlie, in addition to using the articles and books referenced above for free or cheap ways to determine the age of a heating or cooling device, you will want to note both the product name+product number or model number AND, critically, the product serial number. The name and product number help make sure you're using the right decoding procedure. The year and month or year and week of manufacture are usually coded in the heater's or air conditioner's serial number. Often in the first four digits, as our example below illustrates.
Question: how to determine the age of a Polaris Boiler Heater by American Water Heater Co.
I have a Polaris boiler heater manufatured by Amrican Water Heater Company.
Question: determine the age of a Burnham gas hot water furnace
How do I find out the age of an 80,000 BTU Burnham gas hot water
Kern we'd need the serail number not the model number to determine equipment age. In general, just to get our terminology right, usually we call hot water heating equipment a boiler and we reserve the name furnace for warm air heating systems. I know there was an exception but that's generally the case.
A typical Burhham boiler data tag will show numbers like
Model RS-112 Ser- 35044173
or Serial No. 35 048911
or Serial# 01005880
It's that serial number you want.
I am researching the first serial number decode. For the second example, after the 35 (probably model number) the next two digits 04 are month and the nect two digits 89 the year of manufacture of the unit. In the third example we're stuck again - when you've found the serial number, I'd give the company a call, give model and serial number, and just ask them. Let us know what you learn as it will assist other readers.
You can contact Burnham Corporation in Lancaster PA at their customer service number 717-481-8400 or at 888-432-8887.
Question: American Standard Heater Age? Sunbeam?
sunbeam/american standard model sl 85, any info as far as date and age? - Magic Mike 11/4/12
I was not sure if you meant Sunbeam water heaters or American Standard water heaters.
Information on Sunbeam water heaters is at http://www.sunbeam.com - or it would be if their website page links worked. The water heaters I found under that name were little portable devices not home water heaters.
This may help: Standard Water Heaters are is not a simple brand name I could find, except tracing to A.O. Smith. If it's an A.O. Smith product the serial number contains the date encoded as follows:
xxxYY-xM- x xxx
where YY is year and M is month beginning with A= January etc.
Question: Where can I get a circuit board for my Homart electric Furnace?
Need a circuit board for a Homart electric furnace part # R43800R6 where can i find one - Wade 10/11/12
Wade, you can obtain Homart heater parts from Sears Parts Dirct.
Question: How do I determine the efficiency of my 1995 Fleetline Oil Fired Boiler?
How do I determine the efficiency of my 1995 Fleetline oil fired boiler? - Duncan 11/21/12
The heating service tech (not you) should do the following:
Clean the system completely, including boiler, flue vent connector, and if needed, chimney Assure proper combustion air source Adjust the system to factory spec: oil pressure, draft, burner nozzle, electrodes, etc.
the tech will measure the stack temperature at the breech, the CO2 level.
The combination of CO2 level and temperature allow anyone to read a chart of combustion efficiency of the unit in that condition.
Just looking up a spec somewhere tells you little about how your system is actually performing unless you take the steps above.
To read details about this procedure Search InspectApedia for
Oil Burner Tests & Adjustments: Measure & Set Oil Burner Smoke & CO2 Levels
Question: Looking for age of an American Standfard Furnace
Looking for the age of an American Standard furnace
American Standard stopped making oil and gas furnaces in March 1968.
American Standard Boiler Serial Number Decoder:
In older serial numbers using a letter followed by two digits such as C73, the year is the two numeric digits.
In newer serial numbers such as 71B03311 I'm not sure but I'd guess the year is the first two digits (71)
You can contact American Standard to ask: telephone 800-241-4102.
Question: where do I get a part for a squirrrell cage furnace blower fan
I need to replace the u-shaped device that holds the rod for the squirrel cages that is held down by 2 bolts, which go through 2 rubber gromets and are nutted on the other end. How can I order this or these parts? - Russel Jackson 1/27/2013
Russel, just stop by your HVAC supplier, those are common parts. Or tell us the model, brand seria
Question: What is the age of a Bard Natural Gas Furnace?
looking for the of a bard nat. gas furnace Model: 6080D48C. Serial: 970909077 - Dan 2/9/13
Dan, Septmber 1997
Question: how to determine the age of a Moncrief furnace made by Henry Furnace Company
I am trying to determine the age of a Moncrief furnace made by the Henry Furnace Company Model L-95 Series 4. There is no serial #. It is maroon with chrome trim - Matt Falk Aire Serv - 3/29/2013
Reply: History of Henry Furnaces & the Moncrief furnace name
Be sure that any efficiency assessment is done after cleaning and tuning and a safety inspection.
Some history of the Moncrief furnace and Henry Furnace Company are in litigation between a wholesale and retailer of heating equipment:
My understanding is that Henry Furnaces was purchased by Luxaire Inc. in turn joining York International, currently owned by Johnson Controls.
Some of the Moncrief furnaces are operated by gas, others by oil, and there are various models in different price ranges. Plaintiff has been the only manufacturer of Moncrief furnaces in this area since 1943, when it acquired by purchase the plant, patents and all other rights of The Henry Furnace & Foundry Company, which latter company together with its various predecessors, Henry & Scheible Company,
The T. E. Henry Furnace Company and Henry Miller Foundry Company, had manufactured at least since 1905 a furnace similarly known in the trade as a Moncrief furnace. The Henry Furnace & Foundry Company, and its immediate predecessor, The T. E. Henry Furnace Company, prior to the acquisition of its plant and assets by plaintiff, had sold its product, the Moncrief furnace, throughout the United States, with the exception of the states of Georgia, Florida, North Carolina and South Carolina.
Under a consent decree entered into on September 30, 1914, The T. E. Henry Furnace Company and one S. P. Moncrief, in a law suit in a Georgia court, had provided that S. P. Moncrief and his associates should be entitled to the exclusive use of the trade name, "Moncrief," in the four states mentioned; that in the states of Alabama and Mississippi the said Moncrief and The T. E. Henry Furnace Company should be entitled to use the trade name, "Moncrief," in common; and that The T. E. Henry Furnace Company, its successors and assigns should be entitled to the exclusive use of the trade name, "Moncrief," on furnaces sold in all other states of the United States and in foreign countries. (Plaintiff's exhibit 26.) It should be added that there is testimony in the record that in Dallas, Texas, a company under the name of Moncrief Furnace & Manufacturing Company at the present time is engaged in selling a furnace known as the M.F.C. Deluxe but its field appears definitely limited to that state.
Questions & answers or comments about how to determine the age of an air conditioner, heat pump, boiler, furnace, or water heater. .
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