©2007 Armstrong International, Inc. Instantaneous Water Heater Flo-H 2 0 ™ Water to Water Instantaneous Water Heater Flo-H 2 0 ™ Water to Water Armstrong Hot Water Group

2 “Expect many enjoyable experiences!” David M. Armstrong ® Agenda Today’s historic approaches to domestic hot water systems: –Issues and concerns The Flo-H 2 0 concept and solution Sizing, selection, and target applications for Flo-H 2 0 Market Share

3 “Expect many enjoyable experiences!” David M. Armstrong ® Domestic Water Heating Traditional Approach (older) Heating boiler through tank heater to larger storage tank Users draw directly from large tank Typical users: Motels, Dorms, Prisons, Army Barracks Motels Dorms Prisons Army Barracks

4 “Expect many enjoyable experiences!” David M. Armstrong ® Domestic Water Heating Newer Approach Dedicated boiler to heat domestic water for storage in smaller tanks Users draw from smaller tanks Typical installations: Condos, Schools, Apartment Buildings, Nursing Homes Condos Schools Apt. Building Nursing Homes

5 “Expect many enjoyable experiences!” David M. Armstrong ® Disadvantages Floor Space –Residential building 140 units –Dedicated boiler & tanks – 80 sq.ft. Radiation Losses –30% of the total hot water capacity Recover Rate –Slow – Hot water storage Legionella Bacteria –At 115°F and lower Maintenance –Periodic maintenance needed (cement, glass and/or epoxy lined tanks) Leaks

Traditional Approach Schematic

Market Trends Mechanical rooms are getting smaller –Floor space is at a premium Trends towards systems increasing

8 “Expect many enjoyable experiences!” David M. Armstrong ® Solution Armstrong Flo-H 2 0 ™ Instantaneous Water Heater

9 “Expect many enjoyable experiences!” David M. Armstrong ® Flo-H 2 0 ™ Why a Flo-H 2 0? What is a Flo-H 2 0? Components How does it work and operating parameters Features Sizing & Pictures

10 “Expect many enjoyable experiences!” David M. Armstrong ® Why a Flo-H 2 0 ™

11 “Expect many enjoyable experiences!” David M. Armstrong ® What is a Flo-H 2 0 ™ Is a water to water, plate & frame heat exchanger that uses high temp. boiler water to heat potable water for Domestic Use

12 “Expect many enjoyable experiences!” David M. Armstrong ® Main Components of Flo-H 2 0 ™ Plate & Frame Heat Exchanger Primary Pump (VIL) Electronic 3-way valve/actuator Electronic Controls Secondary circulator for re-circulation loop Temp. Switch on domestic outlet Temp. Sensors: Boiler Supply City Water Supply Boiler Return DHW Recirc. From loop DHW supply to loop Mixed City Supply & Recirc.

13 “Expect many enjoyable experiences!” David M. Armstrong ® Flo-H 2 0 ™ Heat Exchanger Three-Way Mixing Valve Temperature Sensors Programmable Logic Controller (PLC) BOILER SUPPLY BOILER RETURN D.H.W. SUPPLY VIL PUMP PFX 3-WAY VALVE CIRCULATOR CONTROLS Take heat energy from the boiler circuit through the heat exchanger and apply it to the cold domestic water RE-CIRC RETURN CITY WATER IN

Flo-H 2 O ™

15 “Expect many enjoyable experiences!” David M. Armstrong ® Operation & Parameters Make all piping connections Temp. Controller in Panel operates on DHW supply temp. & DHW usage using Feed-back & Feed-forward principles Controls are based on PID theory DHW shall be maintained ± 4º F ranging from 110º - 140ºF Low Demands (night time) DHW set point automatically resets to lower temp to reduce heat loss and conserve energy Temp. Switch on DHW side set at 20ºF above set point –When activated, cuts off source of heat by closing boiler port of 3- way control valve 3-way control valve operates like a diverting valve for boiler side

16 “Expect many enjoyable experiences!” David M. Armstrong ® Operating Parameters Operating Temperatures: –Primary (Boiler Side): 180º-200ºF Supply & 160ºF Return (140ºF Min.) –Secondary (Domestic Side): 40º-60ºF City Water & 110º-140ºF Supply Operating Pressures: –Both sides: 125 psig Maximum Water Flows: GPM

17 “Expect many enjoyable experiences!” David M. Armstrong ® Features & Benefits of Flo-H 2 O ™ Complete Package, Yet Compact –Apartment building with 140 units Dedicated Boiler & 3 Tanks (200 gal ea.) → Surface area = 80 sq. ft. Flo – H 2 O Water Heater → Surface area = 9 sq. ft.

18 “Expect many enjoyable experiences!” David M. Armstrong ® Features & Benefits of Flo-H 2 O ™ Easy to Install –In & Out Piping & Electrical Fail Safe –When DHW at temperatures out of range Single Source of Supply, Responsibility, & Support

19 “Expect many enjoyable experiences!” David M. Armstrong ® Features & Benefits of Flo-H 2 O ™ Efficient Use of Energy –Heats water on demand –No heat loss (no tanks) –Ideal for rapidly changing demands Complete System –With all necessary valves

20 “Expect many enjoyable experiences!” David M. Armstrong ® Features & Benefits of Flo-H 2 0 ™ Quick Recovery Rate (Instantaneous) –Never Runs out of HOT WATER Reduces the risk of Legionella disease by avoiding the need to store hot water

Health – eliminates risk of contamination Flo-H 2 0 ™ When is Ideal? Flo-H 2 0 suited to many objectives Flexibility, savings on operating costs Maintainability, replacement, servicing

22 “Expect many enjoyable experiences!” David M. Armstrong ® Control Panel Features UL Approved ± 4ºF control Night time Setback –Studies show loop losses of 10 – 45% of total water heater energy use Building Automation System –BAS Interface Capabilities

23 “Expect many enjoyable experiences!” David M. Armstrong ® Control Panel Features Electronic temperature display –6 temperatures –Visual indicator Easy to Install –Requires one power input

Product Offering 3 Package Sizes Available Model 40Model 70Model 100 Heat exchanger construction Single Plate Double – Wall Plates

Flo-H 2 0 ™ Sizing Step 3: Use Armstrong’s Selection Table to get the required Flo-H 2 O Model Step 2: Obtain the required hot water flow rate in GPM from the chart Step 1: Estimate the number of fixture units for the application

Flo-H 2 0 ™ Sizing Sizing is based on ASHRAE’S Modified Hunter Curve for calculation of hot water flow rate Preliminary Hot Water Demand Estimate (Instantaneous)

Flo-H 2 0 ™ Sizing Fixture Units Curve A - Restaurants Curve B - Hospitals, Nursing Homes, Nurses' Residences, Dormitories, Hotels and Motels Curve C - Apt. Houses Conversion Factor: L/s = gpm x Curve D - Office Bldgs., Elementary and High Schools

28 “Expect many enjoyable experiences!” David M. Armstrong ® Flo-H 2 0 ™ Sizing Procedure Preliminary Hot Water Demand Estimate: Example 1: 200 unit apartment building Step 1: Table 14 of ASHRAE Applications Handbook estimates 3 fixture units (FU) per apartment at 140°F Step 2: Calculate total amount of FU for entire building  Total FU = 3 x 200 = 600 Step 3: From Figure 22 of ASHRAE Applications Handbook, get the required hot water flow in USGPM at 140°F Step 4: Find out boiler supply temperature available to the Flo-H 2 O (200°F)

Flo-H 2 0 ™ Sizing Procedure Step 5: Find out cold water (city) supply temperature to the Flo-H 2 O (50°F) Step 6: Go to Armstrong Flo-H 2 O selection tables and select Model 070 which is capable of delivering 78 USGPM maximum. Second locate cold water supply temperature (Inlet) First locate boiler supply temperature

Domestic water heating only Replaces the traditional storage tank with Tank Heater Market Share & Competition

31 “Expect many enjoyable experiences!” David M. Armstrong ® Heat Source – Market Split USA Steam or Boiler water Market splits 60% for water and up Above split from reps survey (12 answers out of 43 forms)

32 “Expect many enjoyable experiences!” David M. Armstrong ® Heat Source – Market Split Canada Market splits 85% or more for water Steam in downtown Toronto – mainly old installation (retrofit)

33 “Expect many enjoyable experiences!” David M. Armstrong ® Typical Installation: (Steam) Generally low pressure (<15 psig) Most designs are semi-instantaneous –Small tank for low demand –Loop with circs (temp control) Shell & Tube –Mainly single wall –Some double wall

34 “Expect many enjoyable experiences!” David M. Armstrong ® Typical Installation: (Boiler Water) Traditional storage tank with heater New trend is dedicated boiler with 90/10 Cu-Ni tubing. H.Ex. Inside or outside boiler to heat domestic water Code applied at the discretion of engineer/contractor/inspector

35 “Expect many enjoyable experiences!” David M. Armstrong ® Armstrong Promise We provide intelligent system solutions that improve utility performance, lower energy consumption, and reduce environmental emissions... while providing an “enjoyable experience”! 35 “Expect many enjoyable experiences!” David M. Armstrong ®

36 “Expect many enjoyable experiences!” David M. Armstrong ®

©2007 Armstrong International, Inc.