HKLS GmbH is the name of the company.
H stands for Heizung=heating
K stands for Klima=cooling
L stands for Lüftung=ventilation
S stands for sanitary installations
GmbH stands for Ltd. and should be part of the design

Our domain is www.hkls.at

We made a sketch - see attached. the final design must include:
HKLS GmbH 
Heizung|Klima|Lüftung|Sanitär

In our draft we put small symbols describing the company activities. Feel free to use such symbols as well but it is not a must.

Concerning colours: we have three other companys - see attached the logo designs. please choose a different main colour for HKLS GmbH, black and white would be ok as well. Thank you!

It was a pleasure to work with josephope! Great quality and super quick responses! Thank you so much!