Whether you need a proposal on your plans, require leadership from our design/build capabilities, or invite us to participate in a team construct project, your project requires proper design and installation. Small or large, every project at W.J. O'Neil receives the same combination of seasoned skill, commitment to quality, and personal concern for the customer's needs. Your project benefits from our company's promise of true value for your investment no matter how simple or complex.

At W.J. O'Neil Company, we can work with your pre-designed plans & specifications or help in design-assist. Our commitment to your project conforms to the latest standards of quality, performance and energy savings.

Large or small, simple or complex - your project will benefit from WJO's design and build team.

Our design/build services include the following:

Piping Systems

HVAC Systems - For design-build, we bring the expertise in all types of HVAC activities including boilers, hydronic and other types of heating systems, comfort and process refrigeration, packaged or built-up systems, refrigerant management, other code-regulated issues and microprocessor-based Building Automation Systems.

Air Purification Systems - W.J. O'Neil installs equipment which operates under industry- leading air purification technology. Installing indoor air quality systems helps to attack all three classes of indoor air contaminants: small, breathable particles such as dust, dirt, pollen and allergens, airborne mold spores, bacteria and viruses, odors and chemical vapors. These systems, when installed, also reduce and destroy ozone (a product of pollution and a known lung irritant). This equipment provides extremely effective filtration to protect HVAC equipment, which in turn saves our customer money.

Controls & Components - W.J. O'Neil has years of experience installing both commercial and industrial HVAC control systems including DDC, process, pneumatic and electric controls. From conception to completion, we design and manage every system control detail and provide precise monitoring to fit your specifications.