High Velocity Conditioning System

Did you know you CAN have cooling with hot water heat?

Bay Heating & Air Conditioning Trucks Unico, Inc. is the leader in small duct heating and cooling systems and other high-end HVAC systems. The company manufactures all of its products in its modern125,000 square foot plant in St. Louis MO. The company is well known for extensive use in older, architecturally unique homes and buildings as well as elite, high end custom homes. The company is family-owned and operated and sells in all 50 United States, all provinces of Canada, and in over 28 countries around the world.

  • Air is distributed through small 2-inch flexible ducts that fit almost anywhere.

  • Aspirating the stagnant room air with small jets of air eliminates drafts and hot/cold spots.

  • The ductwork is optimized for low noise – no more popping and banging of the duct.

  • Increased moisture removal during cooling. Our coils are designed specifically to remove significantly more humidity for a drier home during cooling.

  • Unico heat pump systems are truly warm air systems – no more “cold blow”. A Unico system delivers the air at substantially higher temperatures than a conventional system.

The Unico system has flexible mini-ducts that weave easily through existing construction.

Family Owned & Operated Since 1944

When you need a company you can trust, you need Bay Furnace.


View up to date SpacePak High Velocity Conditioning System information.

Why Choose Bay?

Learn Why We're The Right 
Choice For You
  • The Bay Comfort Promise

    We are committed to our customers. We aren't done with a job until you are comfortable, guaranteed.

  • Family Owned & Operated

    As a family-owned business we understand the importance of quality in your home and we'll take care of yours as if it was our own.

  • Warranties That Matter

    We provide a thirty-day warranty on all repairs completed and a one-year labor warranty on all new installs.

  • Expert Technicians

    We are mindful in who we hire to ensure you are getting the very best work every time.

  • One Stop Shop

    We are a full service company so we guarantee everything done is completed with the highest standard.

  • 75 Years Experience

    We've been in business since 1944 and we're bringing that experience to every job completed.

Keeping Your Systems In Line Year Round!

Learn more about the Bay Comfort Promise Membership plan to see what we can do for you in every season.

We Love Our Customers & They Love Us

Read Reviews From Happy Bay Customers
  • Convenient to schedule and arrive on time

    “Great group of guys that have solved my problems so far without trying to cut corners and make an easy buck! Convenient to schedule and arrive on time!”

    - Ryan A.
  • Cleaned up the work area as if they were never there

    “Bay furnace installed a whole house humidifier in March. The crew was very polite, professional and cleaned up the work area as if they were never there. I definitely would recommend them.”

    - Diana G.
  • Our basement was cleaner than when they arrived

    “Yesterday we had our furnace replaced. The service people were warm and friendly. They explained everything to us. They explained the thermostat until I understood It. They cleaned up so much that our ...”

    - Nancy B.
  • Everything you'd wish your other service professionals were

    “Highly recommend this company; HONEST, prompt, clean, considerate! Everything you'd wish your other service professionals were. Great job!”

    - B.J.
  • Always does a great job and is friendly and kind

    “Love José and Bay Furnace! He always does a great job and is friendly and kind. We always ask for him. Will continue to use them in the future.”

    - Katie B.

Schedule Your Service Today

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