• Service


    Your heating and cooling should word on demand, efficiently, when you need it to. We service all brands of Heating, Air Conditioning, Fireplaces, and Space Heaters. Whether they are gas or electric, residential or small commercial Read More
  • Sales


    If it can't be repaired or it is just time for an upgrade we can acquire and install the best brands in the industry saving you time and money. We have the expert advice you need to get the right unit for your space. Read More
  • Local


    Family owned and operated for over 20 years we live right here in Piedmont and service the entire Black Hills, Western South Dakota, and all parts between. We're a trusted team with plenty of references and we guarantee all of work and sales. Read More
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Our Mission

Our mission is to provide the best possible sales, service, and support for all brands and types of Heating, Air Conditioning, Fireplaces, and Space Heaters. We pride ourselves in only selling and using quality products and ensuring that we meet the same high standards on our installs and service work.

Whether they are gas or electric, residential or small commercial, we are a the right choice for your project. We offer quality without compromise and will provide you with a service experience that is founded on pride and integrity. If it can't be repaired or it is just time for an upgrade, we can help you with that too, we have expert service and advice and are backed by the best minds in HVAC.

See Our Work

The L and M Blog

  • How To Clean The Glass on a Gas Fireplace
  • How To Beat the Heat and Save Money on Your Cooling Costs

One of the biggest maintenance issues in having a gas fireplace is keeping the glass clean. You may notice a white film that builds up on the inside of the glass from time to time. The best thing you can do is to try to prevent it. You may notice a “fog” or moisture on the glass when you first start your gas fireplace. Try to let your fireplace run for a long enough time so all the moisture has a chance to evaporate. The main reason the glass develops a white powdery film is due to moisture in the

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Ever wonder if there are some simple things you can do so that you can stay cool AND not break the bank when running your air conditioner on those hot summer days?

Of course the number one tip is to have your furnace and air conditioner professionally checked and serviced every year by a trusted professional in your area. They can fine tune your system, check the refrigerant levels, adjust the airflow, to keep your system performing the best possible.

Follow These Simple Tips to Help Out Your System

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Piedmont, SD

Featured Services

  • HVAC +

    Whether it's a new install of nationally backed brands or the diagnosis and repair of your AC or Furance L&M can handle the job. We're local, fast, and responsive.
  • Fire Places +

    L&M has years of experience installing and upgrading indoor fireplaces and hearths. We work with a wide array of brands and designs and are confident we can help you get the best results.
  • Gas Piping +

    We specialize in custom gas pipe runs for fireplaces, furnances, stoves, outdoor grills, fireplaces, and anywhere a gas line is needed.
  • Outdoor Fire Pits +

    We design, build, install, and support custom outdoor fire pits of all shapes and sizes. Transform your backyard or patio like never before.
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