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2. Vaillant Group - Wikipedia

   en.wikipedia.org/wiki/Vaillant_Group

   The history of the Vaillant Group dates back to 1874, when Johann Vaillant set up a master fitter's business. In 1894 Johann Vaillant patented a new "closed-system" gas-fired bathroom boiler. [3] This was the first device that made it possible to heat water hygienically, without contaminating it with combustion gases.

3. What are the most common home maintenance costs? - AOL

   www.aol.com/finance/most-common-home-maintenance...

   In Q3 of 2024, the average annual cost to maintain a single family home rose to an all-time high of $10,433, ... these maintenance costs can vary widely depending on the home and your location ...

4. Heating, ventilation, and air conditioning - Wikipedia

   en.wikipedia.org/wiki/Heating,_ventilation,_and...

   In the United States, federal licensure is generally handled by EPA certified (for installation and service of HVAC devices). Many U.S. states have licensing for boiler operation. Some of these are listed as follows: Arkansas [46] Georgia [47] Michigan [48] Minnesota [49] Montana [50] New Jersey [51] North Dakota [52] Ohio [53] Oklahoma [54 ...

5. Furnace (central heating) - Wikipedia

   en.wikipedia.org/wiki/Furnace_(central_heating)

   In some areas electrical resistance heating is used, especially where the cost of electricity is low or the primary purpose is for air conditioning. Modern high-efficiency furnaces can be up to 98% efficient and operate without a chimney, with a typical gas furnace being about 80% efficient. [ 1 ]

6. Cost estimates come back for boiler, systems ... - AOL

   www.aol.com/cost-estimates-come-back-boiler...

   Nov. 21—The replacement of mechanical systems at three schools in the district is estimated to cost about $3.96 million, engineers with ISG Inc. presented to the Albert Lea school board Monday.

7. National Board of Boiler and Pressure Vessel Inspectors

   en.wikipedia.org/wiki/National_Board_of_Boiler...

   The National Board trains hundreds of boiler and pressure equipment professionals from around the world every year. National Board training facilities are located on a 16-acre (65,000 m 2) wooded campus in Columbus, Ohio.