H Heating, Ventilation, and Air Conditioning
H2.
HIGH PERFORMING ZONED HYDRONIC RADIANT HEATING SYSTEM
CRITERIA FOR QUALIFICATION
H3.
Two points of credit are available for the installation of a high performing hydronic radiant heating system that meets all of the following criteria:
� The heating load must be calculated using Air Conditioning Contractors of America( ACCA) manual J or another approved load calculation method.
� The hydronic heating system must be designed using industry-approved guidelines, such as the Guidelines for the Design and Installation of Radiant Panel Heating and Snow / Ice Melting Systems by the Radiant Panel Association, the Heat Loss Guide( H-22) by the Hydronics Institute Section of Air-Conditioning, Heating, and Refrigeration Institute( AHRI), or equivalent accredited software.
� If the home is on a heated slab, the slab must be insulated according to the California Energy Code( CEC), Subchapter 2, Table 118-A. This includes insulating the edge of the slab and possibly the first four feet horizontally from the outside edge of vertical insulation.
� The hydronic radiant systems should be divided into zones( at least one zone per 500 feet if the space is greater than 600 square feet). � The system uses variable speed pumping or zoned valving. � The radiant hydronic system is paired with a condensing water heater or boiler for temperature modulation, rather than a tankless water heater. � An outdoor reset thermostat that regulates the system based on outdoor conditions is installed. � All pipes outside conditioned space are insulated.
Electric heating or forced air heating systems are not eligible for this measure. Systems with a fan of any kind, including through / on the wall hydronic fan units, are not eligible for this measure.
Hydronic heating systems with a cooling feature are eligible for this measure.
VERIFICATION
Field Verification: The Rater will conduct field compliance verification to confirm equipment and elements of the system, and take representative photos of all elements to support documentation.
Documentation: The Rater will collect a building and / or mechanical plan including calculations, detailing design, zones, equipment, layout, and insulation.
INTENT To eliminate undesired pressurization and air exchange issues common in standard forced air systems.
EFFECTIVE DUCTWORK
DRAFT
CRITERIA FOR QUALIFICATION
Note: This measure is a requirement associated with measure J9,“ EPA Indoor airPlus Certification,” on page 71.
Two points of credit are available as follows:
DRAFT GreenPoint Rated New Home Rating Manual 50 Version 6.0, September 2013
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