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Condensing Gas Rooftop Units (C-RTUs)

Condensing Gas Rooftop Units (C-RTUs) provide a unique opportunity for gas efficiency, especially in the colder climates of the Pacific Northwest. These units, with typically 10-15% higher heating efficiency than non-condensing gas RTUs, offer an innovative option for heating and conditioning a commercial space.

C-RTU Benefits

  • Better air quality (IAQ)
  • Increased occupant comfort
  • Reduced gas usage
  • Lower HVAC energy costs

C-RTU Training Slides & Webinars

These various slide sets were used for trainings that explored the gas-fired condensing rooftop unit (C-RTU) technology and its performance on commercial facilities. The trainings highlight the energy efficiency benefits associated with C-RTUs, while debunking current myths. 

View Slides

See all upcoming C-RTU trainings and events

C-RTU Events

Featured Resources

Pro-Tips for C-RTU Installs

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What’s the difference between installing condensing (C-RTUs) and conventional gas RTUs? Mostly it’s about careful attention to condensate management. The condensing furnace in C-RTUs requires considerations for piping, pumps, neutralizers, and freeze prevention – otherwise there’s the risk that the unit will not function as efficiently as specified, and there’s a threat that the original equipment manufacturer (OEM) may not honor their warranty.

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Ideal Building Candidate for Condensing Gas Rooftop Units

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Condensing Gas Rooftop Units (C-RTUs) are an excellent technology for commercial buildings to increase their HVAC gas efficiency levels. As with all technologies, some buildings are better candidates for C-RTU installation than others. Here are a few considerations to determine if your building could be a good candidate for C-RTUs.

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Upcoming Resources

100% OA C-RTU Case Study: Provides details on the successful installation and operation of a C-RTU conditioning 100% outside air (OA) on a facility in the Pacific Northwest.

30% OA C-RTU Case Study: Provides details on the successful installation and operation of a C-RTU conditioning 30% outside air (OA) on a facility in the Pacific Northwest.

Installer C-RTU Value Proposition: Report that specifically calls out the benefits and value of selling customers on C-RTUs for installers.

Distributor C-RTU Value Proposition: Report that specifically calls out the benefits and value of stocking and supplying C-RTUs for distributors.

Manufacturer C-RTU Value Proposition: Report that specifically calls out the benefits and value of adding C-RTUs to the R&D pipeline for manufacturers who do not currently offer C-RTUs.

Commercial Building Business Case for C-RTUs: Business case for commercial facilities that includes the quantitative financial metrics for C-RTUs, considering many variables of the technology (e.g. %OA, runtime hours, geographic location, applications), and highlights the technology’s benefits to the building.

The NEEA C-RTU team has developed resources for market actors across the supply chain to learn, leverage, and share across the Pacific Northwest.

Contact Christine Riegler

Special thanks to local members of the C-RTU Huddle for their input and support: Rudy Caffall (Aaon/Johnson Barrow), Richard Lord (Carrier), Allison Kim (Cushman & Wakefield), Jeremy Prys (Engineered Air), Ryan Kerr (Gas Technology Institute), Jim Clancy (ICE Western), Mike Berry (McClintock and Bustad, Inc.), and John McKissack (Nortek)