Residential Energy Efficient Swimming Pool Rating System ANSI/APSP-15

The proposed ANSI/APSP-15 American National Standard for Residential Swimming Pool and Spa Energy Efficiency is nothing more than another misguided attempt at justifying improper hydraulic designs.

The "Residential Energy Efficient Swimming Pool Rating System" will assign points a pool or spa hydraulic system for the size of the pipes, style of elbows used, type of pump installed and size of the filter.  These points will be applied towards the energy efficiency rating of the vessel.  Vessels will be rated Gold, Silver or Bronze.

Separate the forest from the trees

On a properly designed hydraulic system all of the components are already compatible and in balance with each other.  This includes the pipe sizing, fittings, filter sizing, pump style and flow rating, flow rates, turn over rates, line velocities, pump curve and the total dynamic head.

The Bottom Line

Properly designed plumbing systems that operate within the acceptable line velocity standards and in the center of a pump's efficiency curve (pump curve) ARE AS EFFICIENT AS THEY WILL EVER GET.

Only utilizing alternative energies to heat and operate a pool will reduce the operating expenses and energy consumption.  Using pumps equipped with Energy Star or VFD motors will also reduce electrical consumption.

True Energy Efficiency Ratings

Energy ratings for a vessel should be calculated by a formula of it's hydraulic efficiency, gallons per minute flow rate and actual kilowatts consumed to move that water.

Poorly designed hydraulics, undersized pipes and filters, substandard plumbing and workmanship, inefficient motors and mismatched components will have a detrimental effect on the calculation.  Assigning "brownie points" for doing things correctly should not factor into the equation.

Vessels should be PASS/FAIL based upon a set standard (around the 80-85 percent level).


Paolo Benedetti, SWD, Principal 
Aquatic Technology Pool and Spa 
 www.AquaticTechnology.com 
International Swimming Pool Consulting and Design, Aquatic Consulting, Watershape Consultants, Expert Witness, Hydraulic Design, Landscape Architecture, Construction Management 
Office: 408-776-8220 
Email: info@aquatictechnology.com 

Major Markets Serviced: San Francisco, Palo Alto, Atherton, Hollywood Hills, Beverly Hills, Malibu, Los Angeles, San Diego, San Clemente, Pacific Palisades, Escondido, Scottsdale, Seattle, Phoenix, Tempe, Portland, Aspen, Vail, Park City, Chicago, Dallas, Houston, Austin, New Orleans, Madison, Detroit, East Hamptons, South Hamptons, Cape May, Ft. Lauderdale, Orlando, Raleigh, Chapel Hill, Cherry Hill, Toms River, Salt lake City, Boise, Denver, Santa Barbaara, Carmel, Carmel Valley, Monterey, Pebble Beach, Oceanside, Big Sur, Napa, Sonoma, Sausalito, Danville, Belvedere, Montecito, Palm Springs, Midland, Manhattan, Greenwich Village, Osaka, Paris, Madrid, Barcelona, London, Seoul, Sydney, New York, Tokyo, Cairo, Istanbul, Athens, Rome, Lisbon, Bonn.

Landscape Lighting near swimming Pools - 2014 NEC 680 changes Pool Electrical Expert states

Prior versions of the National Electric Code (NEC) forbid the installation of low voltage landscape lighting within 10 feet of the water's edge.  The 2014 NEC has made changes to Section 680 to allow landscape lighting to be located less than 5 feet from the water's edge, with certain conditions.

2014 NEC Changes

First of all, the light fixture must be of a design that does not require GROUNDING (that third green internal conductor in the power cord).  The new provision does not address metal light fixtures, but assume that if it is metal, that it will need to be externally BONDED to the grid.  Bootleg or homemade bonding attachments are not permitted, so if it is not supplied by the manufacturer, then that fixture is probably not permitted.

The conductors must be ran inside of a conduit - direct burial near the pool is forbidden elsewhere in the NEC.  Granted, at the end, the conduit must stub up to allow the wire to exit.  A compression seal on the end of the conduit will secure and seal the cord's exit.  

Buried wire nut or underground connections are also forbidden.  All of the electrical connections must terminate in an approved pool lighting junction box.  A typical above grade pool lighting junction box would work fine.  One can also use an in-deck junction box, provided it is filled with re-enterable potting compound to prevent water entry.

The transformer must be specifically rated and listed for low voltage lighting around swimming pools (not just fountains).  If you utilize a transformer designed for underwater 12 volt pool lighting, then you're guaranteed success.

Local Adoption - Lead Time

Thought the 2014 NEC has been approved on the national level, regional and local authorities usually operate on versions that are 1 or 2 generations older.  This is because their government councils have not adopted the current versions.  Local authorities have the options of not accepting code changes or making the code more restrictive.  So, before specifying or installing lighting close to the water's edge, be sure to check with the local building department.

Reference:
NEC 2014, Section 680.22(B)(6) states: “Low-Voltage Luminaires. Listed low-voltage luminaires not requiring grounding, not exceeding the low-­voltage contact limit, and supplied by listed transformers or power supplies that comply with 680.23(A)(2) are permitted to be located less than 1.5 m (5 ft) from the inside walls of the pool.” 
NEC 2014, Section 680.23(A)(2) states that transformers used for low-voltage lighting around pools shall incorporate isolated windings with an ungrounded secondary and a grounded metal barrier between the primary or secondary or double insulation between the primary and secondary windings and shall be listed for swimming pool lighting.


Paolo Benedetti, SWD, Principal 
Aquatic Technology Pool and Spa 
www.AquaticTechnology.com 
International Swimming Pool Consulting and Design, Aquatic Consulting, Watershape Consultants, Expert Witness, Hydraulic Design, Landscape Architecture, Construction Management 
Office: 408-776-8220 
Email: info@aquatictechnology.com 

Major Markets Serviced: San Francisco, Palo Alto, Atherton, Hollywood Hills, Beverly Hills, Malibu, Los Angeles, San Diego, San Clemente, Pacific Palisades, Escondido, Scottsdale, Seattle, Phoenix, Tempe, Portland, Aspen, Vail, Park City, Chicago, Dallas, Houston, Austin, New Orleans, Madison, Detroit, East Hamptons, South Hamptons, Cape May, Ft. Lauderdale, Orlando, Raleigh, Chapel Hill, Cherry Hill, Toms River, Salt lake City, Boise, Denver, Santa Barbaara, Carmel, Carmel Valley, Monterey, Pebble Beach, Oceanside, Big Sur, Napa, Sonoma, Sausalito, Danville, Belvedere, Montecito, Palm Springs, Midland, Manhattan, Greenwich Village, Osaka, Paris, Madrid, Barcelona, London, Seoul, Sydney, New York, Tokyo, Cairo, Istanbul, Athens, Rome, Lisbon, Bonn.