Enjoy Year-Round Comfort in Westland, MI TRUST OUR LOCAL HVAC COMPANY WITH YOUR HVAC REPAIRS Are you tired of shivering at the dinner table? Sick of waking up covered in sweat? Bring your home's temperature back under control with an HVAC repair service from Onnit Heating and Cooling LLC in Westland, MI. Our HVAC contractor can get to the bottom of your HVAC troubles. On top of our excellent repair services, we also provide heater and air conditioner replacement services. Our local HVAC company makes it easy to swap out your old equipment for something much more modern and efficient.