Efficient Gas Rooftop Units
Rooftop units (RTUs) supply heating and/or cooling to meet the thermal comfort requirements of commercial buildings. Inherently convenient, RTUs package heating, cooling and ventilation equipment together in a space that is accessible to technicians without taking up precious real estate. However, most RTUs are using much more energy than necessary. Efficient gas RTUs incorporate a combination of energy-saving features to reduce annual HVAC energy use by up to 40%.
Efficient Gas RTUs: System Requirements & Compliant Equipment
This specification outlines the best practices and approach to delivering efficient gas RTUs that reliably deliver heating energy savings in Northern climates and are easy to install as a direct replacement for existing RTUs. This document further lists currently available Efficient Gas RTU equipment that meets these minimum equipment performance requirements.Resources
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.Resources
All Rooftop Units (RTUs) Are Convenient, But Most Are Wasteful
Rooftop units (RTUs) supply heating and/or cooling to meet the thermal comfort requirements of commercial buildings. Inherently convenient, RTUs package heating, cooling and ventilation equipment together in a space that is accessible to technicians without taking up precious real estate. However, most RTUs are using much more energy than necessary. Efficient gas RTUs incorporate a combination of energy-saving features to reduce annual HVAC energy use by up to 40%.Resources
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.Resources
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
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.Resources
What are Condensing 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. In fact, condensing furnaces can achieve over 90 percent AFUE—a big upgrade when compared to traditional gas furnaces that range between 78- and 82-percent AFUE.Resources
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