The rooftop unit (RTU) decision tree can be used for preliminary screening for replacement of RTU units with more efficient units. This decision tree organizes RTUs into bins for “retrofit,” “replacement,” “no action,” or “needs further analysis.”
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Older, inefficient commercial rooftop unit (RTU) air conditioning systems are common and can waste from $1,000 to $3,700 per unit annually, depending on the building size and type. By replacing or retrofitting them, you can save money, improve your energy efficiency, make your building more comfortable, and help the environment. The Advanced RTU Campaign (ARC) encourages commercial building owners and operators to replace their old RTUs with more efficient units or to retrofit their RTUs with advanced controls in order to take advantage of these benefits. This website shows updates to the campaign including resources and progress towards the campaign's goal.
Defining and Including Energy Goals in the Contractual Process: Examples from the NREL campus presentation given at the NASA Net-Zero Energy workshop June 5-6, 2012
A presentation on a definition framework for Net Zero Energy given at the NASA Net-Zero Energy workshop June 5-6, 2012.
Presentation slides from Introduction to NREL's Large Scale Net Zero Office Building: The Research Support Facility presentation given at the NASA Net-Zero Energy workshop June 5-6, 2012.
Presentation slides from "A Definition Framework for Net Zero Energy" presentation given at the NASA Net-Zero Energy workshop June 5-6, 2012.
Presentation slides from Reducing Plug and Process Loads for a Large Scale, Low Energy Office Building: NREL's Research Support Facility presentation given at the NASA Net-Zero Energy workshop June 5-6, 2012.
This document provides facility managers and building owners with an introduction to measurement and verification (M&V) methods to estimate energy and cost savings of rooftop units replacement or retrofit projects. The M&V methods presented here are helpful in estimating paybacks to justify future projects.
This checklist will assist facility managers and building owners evaluate the capabilities of HVAC companies and the proposals they submit for installation of new HVAC equipment. The questions on the checklist will help owners and managers understand the requirements contained within the ACCA HVAC quality installation Standard 5.
This is the eighth in a series of white papers from Building Design+Construction magazine on the green building movement. It includes contributions from several sources, and focuses on zero and net-zero energy buildings and homes.