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Manuals, parts lists, wiring diagrams for HVAC equipment:

Free downloadable manuals for Air Conditioners, Boilers, Furnaces, Heat Pumps. Here we provide free downloadable copies of installation and service manuals for heating, heat pump, and air conditioning equipment, or contact information for the manufacturers who can provide that information for nearly all major brands of HVAC equipment.

We include links to contact information for each manufacturer or producer of these air conditioners, heat pumps, furnaces, boilers and related equipment, parts, and installation, repair, wiring diagrams, manuals.

We include immediate downloads of example installation & repair manuals and wiring diagrams for air conditioners, heat pumps, and heating equipment from a variety of manufacturers as well as contact information to obtain the exact manual or wiring diagram for your unit.

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Heaters, Furnaces, Air Conditioners, Furnaces, Boilers: parts, manuals, help, Brands J-O

Example parts list for window A/C unit from Sears Free Furnace, Heat Pump, Air Conditioner Installation & Service Manuals, Wiring Diagrams, Parts Lists

Below we provide HVAC manufacturer contact information and direct links to free downloadable installation, service, and users manuals, focusing on hard-to-find manuals for older models or discontinued equipment. We also provide links to the manufacturer's current model lists and literature.

Note: for page loading speed this index to HVAC manuals is spread across several pages, but all of the individual companies are listed in this HVAC MANUALS MASTER INDEX

Note: for page loading speed this index to HVAC manuals is spread across several pages, but all of the individual companies are listed in this HVAC MANUALS MASTER INDEX

Direct Links to Free Downloads of Heat Pump parts lists, wiring diagrams. Direct Links to Free Downloads of Boiler Manuals. Links to free copies of Lennox Equipment Installation, Service, & Owners Manuals for Lennox furnaces, Lennox heat pumps, Lennox Air Conditioners. Furnace & Boiler recalls, heating system safety notices.

Before paying for a furnace or boiler or air conditioner manual, see if it is already listed here or at the manufacturer's website. If you have trouble finding a mechanical system installation or service manual, Contact Us and we will research it for you at no charge.

Also see MANUALS for HEATING SYSTEM CONTROLS for a list of free downloadable PDF files of common heating system controls used on boilers, furnaces, heat pumps.

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

In those articles we provide documents with extensive equipment data tag decoding information, both free, and for purchase from other sources.

At REFERENCES we provide more contact information, links to current model list information, product specifications, and installation/operation manuals for each manufacturer.

Janitrol Heating & Air Conditioning

Janitrol, as a division of Surface Combustion Corporation, purchased by Midlan-Ross in 1960, Tappan in 1977, later sold to Goodman Manufacturing in 1982.

HVAC Equipment sold under brands: Goodman, Hamilton, Johnstone, Sears Kenmore Brand.

Johnson HVAC Controls, Furnaces, Garage Heaters, HVAC systems, Manuals

Watch out: these local dealers or service companies are not a product manufacturer but the company's website may come out on top when searching for contact information for Johnson garage heaters, or HVAC systems.

King Electrical Mfg. Co.

Lennox Furnaces, Heat Pumps, Air Conditioners - Contact Information, Manuals, Data Tag Decoding - contact information

To find a Lennox Dealer near you go to and enter your zip code in the box at the web page upper right corner, OR use the links to Lennox at the left side of this web page (supplied by Google).

LINKS to OLDER, hard-to-find Lennox HVAC equipment manuals are provided at this website - LENNOX MANUALS & GUIDES - HVAC just below.

The Lennox Pulse furnace safety inspection is (or was) free, but if the furnace has to be cleaned in order to be inspected, the customer could be charged for the cleaning.


At Technical Reviewers & References we provide more contact information, links to current model list information, product specifications, and installation/operation manuals

Lennox: free, downloadable Lennox Pulse Furnace User's Manuals and Service Manuals are listed just below:

LG HVAC Systems

Lochinvar Boilers & Water Heaters

Magic Chef Appliance Manuals & Contact Information

Magic Chef purchased by Maytag in 1986, air conditioning division sold to Lennox in 1988, renamed Armstrong Air. Also see Johnston HVAC.

Maytag Appliances

McDonnell & Miller Controls for Heating Equipment, Boilers, Steam Boilers

ITT McDonnell & Miller LWCO Type 801 802 851 (C) InspectApedia

Miller Furnaces

Miller Furnaces, founded 1916, has been purchased by NORDYNE - Nortek HVAC. Also see Intertherm. The Miller Furnace company produces electric furnaces, gas furnaces, oil furnaces.

Mirage mini split air conditioning system Manuals & Contact Information

Mitsubishi HVAC Systems, Manuals, Contact information

Without spending some time poling around it can be difficult to to find installation or operation manuals for their HVAC systems but you should be able to obtain the specific guide for your equipment from your supplier or from the company itself.

Mortex Electric Furnaces

National U.S. Radiator Corporation HVAC

National U.S. Radiator HVAC, also doing business as Capitolaire, was acquired by Crane Industries in 1960. See CRANE INDUSTRIES HVAC

Nesbitt HVAC

Nesbitt Corporation was acquired by ITT in 1963. ITT divested Nesbitt in 1979 and the company filed for bankrupcy the next year, in 1980. Nesbitt is currently an un-related tradename used by Mechanical Specialties, Inc. [Citations needed]

Niagra HVAC

NIAGRA hvac was acquired by RYBOLT HVAC in 1961.

Norton Electric Furnaces

Nordyne Furnaces & HVAC Systems, Nortek Global HVAC

Nortek Global operates the following Commercial brands: Mammoth, Renzor, Servercool, and these Residential brands: Frigidaire, Intertherm, Maytag, Miller ,Gibson, Westinghouse in Europe and in North America.

Olsen Airco HVAC Systems

Olsen / Airco Heating & Cooling Products include central air conditioning systems, condensing gas fired boilers, conventional gas fired heating boilers, oil fired heating boilers, electric furnaces, oil fired furnaces, and indirect fired water heaters. The company provides an extensive literature download library for which we give a link just below.

Olsen / Airco is a brand owned by ECR International in Utica, NY. Olsen's headquarters is in Wallacburg, Ontario, Canada, as you'll see in the second contact address given below.

In 1965 Olsen HVAC was re-named Luxaire, Inc. and sold equipment under the brand names Luxaire & Moncrief. Luxaire was cquired by Westinghouse, subsequently re-sold to Borg Warner's York Division in 1981.

Olsen/Airco brand heating furnaces were produced by Duomatic-Olsen, DMO Industries. In 1989 DMO Industries was renamed Olsen Technology, Inc. OIsen Technology was purchased by Canadian Manoir Industries Ltd. and the new company, ECR International Ltd., kept Olsen as a division.


Oneida Royal Boilers

Oneida Royal Boiler Company was purchased by UTICA Boilers in 1990. [Citation needed]


Continue reading at MANUALS for HEATING SYSTEM CONTROLS or select a topic from closely-related articles below, or see our complete INDEX to RELATED ARTICLES below.

Or see MANUALS & PARTS GUIDES - HVAC - home - Master Index to All Brand Names & A-E HVAC manuals, wiring diagrams, installation and repair guides

Or see AGE of WATER HEATERS - data tag decoding, contact information for water heater manufacturers, water heater manuals



Or see BOILERS, HEATING - home


Or see DATA TAGS on AIR CONDITIONERS for help decoding the equipment age and other specification




Or see THERMOSTATS, ARTICLE INDEX to HVAC for a complete list of thermostat instructions by brand and type

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MANUALS & PARTS GUIDES - HVAC Brands J-O at - online encyclopedia of building & environmental inspection, testing, diagnosis, repair, & problem prevention advice.


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