Ụlọ ọrụ Houweling ebibiela ikpe mmebi iwu patent megide Little Leaf Farms of Devens, Massachusetts. N'okwu ikpe ahụ, Houweling boro ebubo na Little Leaf mebiri akwụkwọ ikike US nke Houweling nke 8,707,617, akpọrọ "Greenhouse and Forced Greenhouse Climate Control System and Method."
Dị ka a akụkọ ntọhapụ, Little Leaf ugbo kwetara na asserted Houweling si patent dị irè ma na-ekweta na-akwụ Houweling si a royalty maka Little Leaf si ojiji nke Houweling si patented griin haus technology.
Houweling's kwuru na ọ "mepụtala ọtụtụ ọganihu ọhụrụ na teknụzụ griin haus wee tinye oge na akụrụngwa iji hụ na Houweling ka dị n'ihu na mmepe griin haus na mmepụta ihe ọkụkụ. Iji mezuo nke a, Houweling's enwetala nchebe patent maka ụlọ akwụkwọ ndụ akwụkwọ ndụ griin ha na, sistemu nkesa ikuku/gas. N'ime afọ ndị gafeworonụ, Houweling anọgidewo na-amanye ikike ikike ikike ya megide ndị na-emebi iwu na-anwa imebi ma ọ bụ “piggyback” na teknụzụ echekwara nke Houweling.
Onye isi oche ụlọ ọrụ, Casey Houweling kwuru;
"Mmepe nke teknụzụ ndị a, na-abịa na nnukwu ihe egwu na itinye ego. N'ịchekwa ikike ikike na ikwere ọganihu nkà na ụzụ ndị a dị ịrịba ama na ụlọ ọrụ anyị, anyị mere ka ha dị site na usoro ezi uche dị na eze. Nke a na-enye ụzọ maka ndị ọzọ iji nweta nkà na ụzụ, ebe ọ na-enye ohere iji nwetaghachi akụkụ nke ụgwọ mmepe, "Onye isi oche ụlọ ọrụ Casey Houweling kwuru.
"Houweling's na-ezube ịga n'ihu na-amanye ikike ikike ya megide ndị ọ bụla na-emebi iwu, na United States of America, yana na ikike mba ọzọ dị ka Europe, Australia, New Zealand, Israel, Canada na Mexico. Houweling ga-agbachitere ihe ịma aka ọ bụla na ikike ikike ya n'ụwa niile, ọ ga-agwụkwa ụzọ niile nke ịrịọ arịrịọ megide ihe ịma aka ndị dị otú ahụ.
Houweling's Group bụ onye na-akụ akwụkwọ nri griin haus, onye mgbasa ozi na onye na-ere ahịa nwere ọrụ na Delta, BC, Camarillo, California, Mona, Utah na Loveland, Colorado. Onye na-eto eto kwa afọ, nke nwere ihe karịrị acres 200 nke ugbo griin haus, Houweling's kwuru na ọ na-amịpụta tomato na cucumbers dị ọhụrụ ma na-atọ ụtọ.