Condensing Gas Rooftop Units

Condensing rooftop units (C-RTUs) have recently entered the commercial RTU market, providing the benefits of non-condensing RTUs at much higher efficiency levels and lower operating costs. Compared to a traditional gas furnace, C-RTU's have a 10-15% higher heating efficiency and up to 11.5% reduction in gas energy usage.

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HVAC
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Condensing Rooftop Units (C-RTUs) Bring Promise of Higher Efficiency and Reduced Building Operating Costs

Rooftop units (RTUs)—HVAC appliances installed on building roofs—are commonly used in commercial applications due to their inherent convenience: RTUs package heating and cooling equipment together in a space that doesn’t take up precious real estate and is still accessible to technicians.

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HVAC
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- Condensing Gas Rooftop Units

Condensing Rooftop Unit Field Study Summary Report

To better understand challenges and to evaluate field performance, user acceptance, reliability, and energy savings potential in the Northwest, NEEA partnered with local utilities and businesses to install and monitor four condensing rooftop units (C-RTUs). This report summarizes the field study results from those four units during the 2018/2019 heating season. For more detailed information and findings, view the C-RTU Field Study Final Report at: betterbricks.com/resources/condensing-rooftop-unit-field-study-final-report

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HVAC
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- Condensing Gas Rooftop Units

Condensing Rooftop Unit Installation and Best Practices Guide

This guide outlines best practices for the proper installation of condensing rooftop units (C-RTUs). These recommendations are based on a comprehensive field study conducted during the 2018/2019 heating season, in combination with a literature review of state and national code requirements and manufacturer guidelines.

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HVAC
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- Condensing Gas Rooftop Units

Condensing Gas Rooftop Unit (C-RTU) Installation Tips and Best Practices

C-RTU installation is very similar to the installation of conventional gas rooftop units (RTUs). However, C-RTUs require careful attention to condensate management, including specific approaches to piping, pumps, neutralizers, and freeze prevention. This guide references code requirements, manufacturer instructions and practical experience to provides tips and best practices for installing C-RTUs.

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HVAC
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- Condensing Gas Rooftop Units

Condensing Rooftop Unit Brings Gas Efficiency to Spokane Restaurant

Due to a degrading rooftop unit at The Onion Bar & Grill in Spokane, Wash., the retaurant owners experienced high energy costs while the kitchen staff dealt with poor indoor air quality. To fix this, co-owners Ken Belisle and Roger Dadi partnered with Doc Holliday at Holliday Heating to find a cost-effective solution: the installation of a new gas-fired condensing rooftop unit (C-RTU).

Case Studies

HVAC
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- Condensing Gas Rooftop Units

Condensing Rooftop Unit Field Study Final Report

Condensing rooftop units (CRTUs) have been identified as an efficient natural gas technology with energy savings potential in Northwest commercial buildings. CRTUs face several challenges in becoming a widespread technology, including higher upfront cost, added complexity managing condensate, contractor unfamiliarity with the technology, and limited manufacturer offerings.

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