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A & H provides a complete range of heating, ventilation and air conditioning services for your home. We have been keeping residents of the Greater St. Louis Metro area cool in the summer and warm in the winter with over 250 years combined experience in HVAC installation, service, and sales.

Serving residents of Alton, O’Fallon, Troy, Highland, Glen Carbon, Collinsville, Edwardsville, Belleville, Columbia, Waterloo, St. Louis City & County and everywhere in between!

Air Conditioner Sales/Install

We can help you maintain and repair the system you have, or replace it completely. As factory-trained technicians, we can provide routine periodic inspections, licensed warranty and post-warranty repairs, and immediate emergency response.   …Continue Reading

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Furnace Sales/Install

We understand that no other single system in your home plays a larger role in your comfort or how much your utility bill will be than your heating system. That’s why we specialize in comfortable, cost-effective heating solutions, including furnaces, geothermal units, and heat pumps.   …Continue Reading

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Duct & Vent Replace/Install

Having trouble cooling or heating your 2nd floor an add-on or a specific room in your house? It could be ductwork issue! Improperly sized or designed ductwork is the most common reason people are not comfortable in their own homes.   …Continue Reading

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Preventative Maintenance

Maintenance Tips Keeping your heating and cooling systems in good working order means your utility bills will be lower, your home will be more comfortable, and you’ll need to call for repairs less often.   …Continue Reading

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How a Boiler Works The boiler usually sits on top of a burner in which fuel is burned to produce heat. The fuel produces the heat, the water or steam in the boiler is used to distribute the heat through the house usually via pipes and radiators.   …Continue Reading

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Geothermal Heating

If you are looking to reduce your energy costs and consumption, a geothermal HVAC system may be right for you: Most geothermal systems function using a ground-source heat pump.   …Continue Reading

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Air Quality

Healthy Indoor Air Quality We are all well aware of the unavoidable pollution problems we encounter outdoors on a daily basis, but we really need to take a look at the indoor pollution problems inside of our home, school, workplace, or car where, according to the U.S. Environmental Agency, we spend 90% or more of each day.   …Continue Reading

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Design/Build HVAC

As an furnace and air conditioning installation contractor, A & H Plumbing Heating and Cooling represents a philosophy concerned with energy efficiency and the environment.   …Continue Reading

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