DRAFT GreenPoint Rated Existing Home Rating Manual version 6.0 | Seite 76

H

Heating, Ventilation, and Air Conditioning ? ? ?

One operable window and one operable skylight Two operable windows Operable windows and skylights in various locations of the unit with no doors or other obstructions in between

VERIFICATION Plan Review: The Rater will verify cross-ventilation strategies in a plan review. Field Verification: The Rater will conduct field compliance verification and take photos of cross-ventilation strategies. INTENT To reduce cooling energy consumption, particularly during peak load periods, by providing low energy forms of comfort.

H9.

WHOLE HOUSE MECHANICAL VENTILATION PRACTICES TO IMPROVE INDOOR AIR QUALITY

CRITERIA FOR QUALIFICATION Up to three points of credit are available for completing the following measures: H9.1. ASHRAE 62.2 Mechanical Ventilation Residential Standards (Required)

The mechanical ventilation system must meet ASHRAE Standard 62.2-2010 for minimum requirements for mechanical ventilation, as described in the 2013 Title 24 Part 6. Note: This measure is a requirement associated with measure Error! Reference source not found., “Error! Reference source not found.,” on page Error! Bookmark not defined.. H9.2. Advanced Ventilation Standards (1 Point)

While meeting the requirements of ASHRAE Standard 62.2 delivers adequate outdoor air, it does not maximize such a system’s capabilities. This measure addresses continuous operation, minimum fan efficacy, air filtration, and homeowner instructions. Following all of the following practices will deliver a significantly improved system and is required for this measure. ? ? ? ? ? The ventilation fan must be sized for continuous (non-stop) operation. Ventilation fans must deliver at least 0.35 air changes per hour (AC/h), per ASHRAE Standard 62.12004. Supply and balanced ventilation systems must include a minimum MERV 6 filter that is readily accessible for inspection, cleaning, or replacement. Remotely mounted fans and ductwork should be installed to minimize transfer of noise and vibration to the living space. Ventilation system fans should be HVI-rated to deliver at least 1.0 cfm/W (maximum 1.0 W/cfm) at no less than 0.25 inches water gauge. GreenPoint Rated Existing Home Rating Manual Version 6.0, September 2013 © Build It Green

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