Tepid Water Solutions Data Sheet

WWW.EEMAX.COM
EX09001-70 REV 2018-04
EEMAX INC. 400 Captain Neville Drive, Waterbury, CT 06705 Tel. [phone] Fax [phone]
1. Approximately 85% of emergency equipment in the US is out of compliance according to equipment manufacturers.
2. As of August 1, 2016, OSHA fines increased 50-80% resulting from worker injuries from non-compliant showers.
3. Emergency equipment is meant to be highly visible and it is often the first stop on an OSHA inspection.
Why should you care about providing “tepid water” to your emergency equipment?
A. What is the tepid water criteria for the ANSI Z358.1
standard?
B. Why not simply run piping from existing hot water sources?
C. Can I utilize storage tank water heaters?
D. Can I tap into existing steam lines with ASSE 1071
thermostatic mixing valves to get tepid water?
E. Can I tap into existing hot water systems and use
thermostatic mixing valves to get tepid water?
F. What are the advantages of electric tankless?
G. Do I need a T&P valve, drains, or any mixing valves if I use
the Eemax heater?
H. If my facility requires multiple showers, can I use an Eemax
unit for more than one shower?
I. Can the Eemax heater be used for other hot water
applications in addition to tepid water?
J. Is maintenance required with the heater?
K. Can the heater be mounted in corrosive, explosion proof,
or outdoor areas?
L. Are there any Legionella growth concerns?
[Q&A] WHY DOES AN EEMAX TANKLESS HEATER MAKE SENSE?
A. 23 GPM for at least 15 minutes at 60°-100°F which equals 345
gallons of available tepid water.
B. Showers must be available within 10 seconds of the work place so
large volumes of hot water must be nearby.
C. Tank systems require 150 gallons at 160 degrees. They are 1300 lb
and consume energy 24/7. An Eemax tankless heater is suitcase size
and only uses energy when tepid water is needed.
D. Steam systems may not always be accessible or powered on. Mixing
valves are costly, create additional maintenance and extra piping is
required.
E. The installation of a hot water loop (pipe, pump, hangars, insulation,
mixing valve) can be costly, may not have capacity, and create
additional maintenance.
F. No gas pipe, no vent, wall mountable, energy efficient, and typically
lower installed cost vs. other hot water sources.
G. Most inspectors recognize that the Eemax EFD model does not
require any additional drains or valves.
H. Depending on incoming water temperature and the distance between
showers, one heater could serve multiple showers.
I. Specifying the 140°F model (remove EFD suffix) and pairing it with an
ASSE 1071 mixing valve allows the heater to serve multiple needs.
J. The heater is designed to be maintenance free.
K. The heaters can be built with an array of options depending on exact
needs with a 5-15 day lead time and are built in the US.
L. Legionella grows between 90-115°F so only hot water storage and
recirculating systems are problematic.
SITE SURVEYS AND DESIGN
ASSISTANCE FROM EEMAX
AVAILABLE AT NO CHARGE
Commercial 120 Gallon Electric Tank Storage Loss
STANDBY HEAT LOSSES ASSOCIATED WITH RECIRCULATION AND STORAGE TANKS
Recirculation Loop Heat Loss
Year 1 Year 2 Year 3 Year 4 Year 5
Loop Length (ft) (includes supply out and loop return) 200 200 200 200 200
Pipe OD (in) (average supply and return pipe diameters) 1.375 1.375 1.375 1.375 1.375
Pipe ID (in) (average supply and return pipe diameters) 1.265 1.265 1.265 1.265 1.265
Insulation Thickness (in) 1 1 1 1 1
Temperature of Hot Water (°F) 140 140 140 140 140
Ambient Air Temperature (°F) 70 70 70 70 70
Thermal Conductivity of Copper Pipe (Btu-ft/hr*ft2*°F) 223 223 223 223 223
Thermal Conductivity of Polyurethane Insulation (W/(m*K)) 70 70 70 70 70
Heat Loss Q (kW) 2.84 2.84 2.84 2.84 2.84
Electricity Cost Per kW-hr ($) $0.090 $0.090 $0.090 $0.090 $0.090
Time (hr/yr) 8760 8760 8760 8760 8760
1/4 Hp Pump Electricity Cost ($/5 years) $315 $315 $315 $315 $315
Cost to Hold Loop at Temperature for 1 Year $2,242 $2,242 $2,242 $2,242 $2,242
5 Year Heating Losses + Pump Electricity Cost $11,208
Year 1 Year 2 Year 3 Year 4 Year 5
Tank Energy Factor (EF) Rating 0.86 0.85 0.83 0.82 0.80
Temperature of Hot Water (°F) 140 140 140 140 140
Ambient Air Temperature (°F) 70 70 70 70 70
Heat Loss Through Tank (kW) 0.58 0.59 0.60 0.61 0.62
Electricity Cost Per kW-hr ($) $0.140 $0.140 $0.140 $0.140 $0.140
Storage Cost of Hot Water ($/year) $717 $726 $736 $745 $755
5 Year Storage Losses $3,679
For detailed specification information on SafeAdvantage products, consult the Eemax Specification Guide.
Tepid Water Solutions
Tankless Heaters for ANSI Z358.1 Safety
Shower and Emergency Eyewash