Denise Richards Sues A/C Installer — I’m SO Heated Right Now

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Denise Richards
has been sweating balls in her giant L.A. mansion — claiming contractors she hired completely botched her air conditioning system and more … and now, she”s filed a lawsuit.

Denise — who”s been working on her house forever — is suing a bunch of contractors, claiming they not only ruined her A/C, they also botched the electrical layout of her home, destroyed her roof, and demolished areas of the house they weren”t supposed to … just so they could charge her a premium to fix them.

And what”s worse … Denise says the contractors blew through their budget, racking up more than $3 million in charges for renovations that should have cost $1.6 million.

As a result of their crappy work, Denise says temps in parts of her house — where she lives with Brooke Mueller“s twins as well as her own kids with Charlie Sheen — now reach 90 degrees on hot days, there”s no ventilation, and she”s got sewer gases in her attic … the list goes on.

It”s unclear how much — if any — Denise has already shelled out to the contractors in question, but she”s now suing for more than $1,000,000 in damages.

The contractors had no comment.