I am getting a few requests for more information on what we like about each design, so here goes:
All: incorporation of the H, color choices
Zrox: the display of moving up / achievement, font style, looks powerful but is not overwhelming and is subtle in approach
LawrieM: Orange and blue is used in a way that looks like "hot and cold", which pertains to HVAC, logo is recognizable and memorable. Also subtle in approach.
logope: Incorporation of both H and M, abstract idea of two people shaking hands shows teamwork and business savvy,
Gemadha: Abstract logo of buildings, easily recognizable, simple and subtle in approach
Khalifah: incorporation of both H and M in a way that the H is much more prevalent than the M, font type, simplicity