In the 1950's Geisel Manufacturing started installing forced air furnaces. The first brand sold was Luxaire, which were made in Elyria, Ohio.  They also installed the Herbster combination furnace and clothes dryer. 

When Claude Geisel retired in 1953, (He died in 1959) Floyd Schlitt took over the business.

In 1954, Geisel Manufacturing installed 800 conversion burners. They also had another dealer in Denver, Colorado.

In the late 1950's Geisel Manufacturing moved to their present location, 633 W. Broad St. Elyria so they could have their offices and manufacturing facilities in one building.  The building had formerly housed a dry cleaner and was used as a furniture warehouse.  The second floor used to have a nightclub in it. The building was rented from Milt Ardman who owned Elyria Furniture on Broad St. 

In 1960 Floyd Schlitt retired. (He died in Nobember 1963)  Bill Engelland and Porter Messinger bought the business from Schlitt plus the lot to the west of their current location after a house was removed.

In the mid 1960's the company started to install central air conditioning systems.  This was great because it gave the business year around sales.  They also expanded their product line to include American Standard, FloCo Company and Bryant furnaces.  At this time the company was installing approximately 200 furnaces per year.  With the advent of forced air heating systems the demand for the conversion burners dropped off and Geisel quit manufacturing the Geisel Glo-Cone Conversion Burners.  Over the life of the business, Geisel installed approximately 10,000 conversion burners in Lorain County.   

When Porter Messinger died in 1974, Bill Engelland sold the business to Chuck Culberson who took over operations January 1st, 1975.  Culberson had worked with the Carrier distributor in Cleveland prior to buying Geisel and he began selling the Carrier brand of heating and air conditioning products. His background was in the commercial engineering area and he expanded Geisel's business into the commercial and industrial markets.  

In 1983 Andrew Culberson began working full time at Geisel after receiving a masters degree from Baldwin Wallace College.  During the following years Geisel placed a heavy emphasis on offering innovative products.  In 1994 Geisel added a full service plumbing division.  Chuck Culberson retired in 1995 and Andrew Culberson became President of the company.

As the new president Culberson understood that, in the end, it's the people who make the difference. By insisting on consistent professionalism, customer-focused attitudes and empowering all Associates to do what's right, both the customers and Geisel's Associates have a higher level of satisfaction in a job well done. The result is customers who come back, refer Geisel to friends and family and Associates who stay with the company longer than any other company in the area.   

In 1996 Geisel won the prestigious Carrier Distinguished Dealer Award. Only 10 among the 8,000 dealers in North America were named as a Carrier Distinguished Dealer this year. Geisel Heating, Air Conditioning & Plumbing was proud to be one of them.

It meant that Geisel has demonstrated superior quality and professionalism in: customer service, Associate development, business planning and customer satisfaction