1. Charleston Towers West Virginia BOILER REPLACEMENT ASSESSMENT AND PROPOSAL AUGUST 2007

2. Simple Combustion Efficiency 1000 Fuel In Cooler Water Back 800 In Heat Out 20% of fuel Wasted 80% Efficient Boiler Fuel is the energy the boiler is provided. (What you pay for) Heat out is how much you get out of that fuel. (What you actually get) Wasted is the Fuel you couldn’t use. (What went up the stack and outside) Cooler water is what you get back AFTER your building used the heat you provided it. Obviously, it needs to be heated again.

3. Simple Combustion Efficiency 1000 Fuel In Cooler Water Back 800 In Heat Out 20% of fuel Wasted 80% Efficient Boiler 80% = $1.00 SPENT TO GET $ 0.80 IN HEAT You’ll have to spend $10,000.00 to get $8,000 in Heat!

4. Simple Combustion Efficiency 1000 Fuel In Cooler Water Back 800 In Heat Out 20% of fuel Wasted 80% Efficient Boiler Put $500 back in your pocket by making the boiler fire 85% or $1000 @ 90%.

5. Water Temperature and Efficiency 18040 130 inlet water temperature boiler efficiency, % 80 80100 86 86 94 94 condensing boiler condensing boiler non-condensing boiler dew point natural gas = 1050 Btu/ft 3 80

6. Solving Waste by Boiler Type Boiler TypeCondensingCopperSteel Firetube Steel Water Tube Cast Iron Typ. Efficiency 85% - 98%85% - 88%78% - 82%80% - 85%80% - 84% Minimum Return Temp 60F or below 120F140F130F135F – 140F 2000 MBH Typ. Price $25,000$15,000V: $16,000 H: $20,000 $16,000$13,500 (Must assemble)

7. Which is best for you? Boiler TypeCondensingCopperSteel Firetube Steel Water Tube Cast Iron Typ. Efficiency85% - 98%85% - 88%78% - 82%80% - 85%80% - 84% Minimum Return Temp 60F or below120F140F130F135F – 140F 2000 MBH Typ. Price$25,000$15,000V: $16,000 H: $20,000 $16,000$13,500 (Must assemble) Low Temperature System – Use Condensing (Return at 80F or below) Mid Temperature System – Use Copper (Return at least part of the season at 120F or above) High Temp System – Use Steel Fire or Water Tube/Cast Iron. (Return at 140F – 160F – Usually 180F – 200F supply)

8. Other Waste? Electrical Losses from Pumps or large blowers. Jacket losses amplified by larger volumes and steel designs. Temperature Control Limitations. Purge Losses. Vent Losses. Maintenance or Life Cycle costs. 80% Efficient Boiler

9. Thermal Efficiency Life Cycle Cost Decrease in Thermal Efficiency Decrease in Thermal Efficiency 5% 10% 7.5% 6% 9.3% 12.8% Increase in Fuel Cost for Life of Product

10. Load Matching SOLID SIZING DONE BY EXPERIENCED AND ACCREDITED ENGINEERING BOILER TURNDOWN MODULAR BOILER PLANT. CONTROL WITH INTER- BOILER COMMUNICATION TAKE FULL ADVANTAGE OF SEASONAL OR WATER TEMPERATURE OPPORTUNITIES.

11. Load Matching When loads vary, the boilers need to match the load. Proper sizing of the boilers and sufficient turndown (not excessive) adds to efficiency. Offset first cost quickly with proper evaluation of system demands. Eliminate short cycling while firing boilers at the most efficient rate (low fire) most of the season. based on Windsor Locks, CT 5656 degree days months 10 jan degree days 20 30 40 50 dec

12. Identify Your System HOT WATER HEATING LOOP (Basic main loop, radiation, air handlers, etc.. May be cut into or flow off of this loop.) STEP ONE: Determine the water temperature required for the system and roughly how many degrees the system will remove from the water (system delta tee) 100F 80F

13. Identify Your System HOT WATER HEATING LOOP (Basic main loop, radiation, air handlers, etc.. May be cut into or flow off of this loop.) STEP TWO: Begin to weigh first cost vs. long term savings. Look closely at the cost of maintaining and operating your plant. Proper boiler selection OR system piping becomes CRITICAL!

14. SYSTEM REQUIREMENTS LOW TEMPERATURE HEATING LOOP RUNNING YEAR ROUND. STANDARD EFFICIENCY BOILERS (STEEL or CAST): Special piping required. Special flow requirements. Added pumps and equipment will be needed. Firetube is not typically applied to a low temp system based on temperature requirements.

15. STANDARD EFFICIENCY STEEL FIRETUBE WILL REQUIRE YOU SEPARATE THE COLD SYSTEM WATER FROM THE BOILER. ONE OF TWO OPTIONS ARE AVAILABLE.

16. STANDARD EFFICIENCY HEAT EXCHANGER OPTION: (YOUR CURRENT CONFIGURATION) 80F SYSTEM

17. STEEL / CAST DISADVANTAGES SYSTEM REDUNDANCY? MUST RUN HOT. 140F OR ABOVE. TOO MUCH PIPE IF DONE RIGHT!

18. STEEL / CAST DISADVANTAGES EXTRA PUMPS NEEDED 8HP IN ADDED OPERATIONAL COST 9 COUPLINGS 9 BEARING ASSEMBLIES 9 PUMPS TO OIL AND MAINTAIN 12 3 4 5 768 9

19. STEEL / CAST CONCERNS FAILED HEAT X COULD SHOCK THE BOILERS (NOT GUARANTEED) VERY DIFFICULT TO CONTROL INSUFFICIENT SIZES AVAILABLE LIMITED TURNDOWN OR LOAD MATCHING COMBUSTION AIR / VENTING HUGE LOSS IN COMBUSTION EFFICIENCY 365 DAYS PER YEAR. MAINTENANCE SETTINGS, ADJUSTMENTS, AND INSPECTIONS.

20. INTERNAL COIL DESIGN Option 2 puts the separation on board the boiler with a coil around the firetube bundle.

21. INTERNAL COIL DESIGN COIL WILL WRAP THE FIRETUBES COIL IS NOT REPAIRABLE. FLOW WILL BE A CERTAIN CONCERN AS COPPER SHOULD NEVER EXCEED 7’ PER SECOND. 35GPM WILL BE A 50F DELTA T. SYSTEM VOLUME IS A CONCERN

22. CONDENSING SOLUTION Selecting the properly configured condensing boiler is a long term solution that will make up the first cost quickly and continue to pay back.

23. CONDENSING SOLUTION 30-300gpm flow turndown. Should not need pumps! 5:1 fuel turndown for load matcing. On board controls communicating between boilers. Completely repairable CAST IRON

24. CONDENSING SOLUTION No minimum return temperature 6 sections (not 60 tubes) per boiler if repair is needed. Automatic combustion correction. Sealed combustion approved. Quiet! Under 70db.

25. CONDENSING SOLUTION Matching seasonal load with maximum turndown and on board energy management controls and communication. months 10 jan degree days 20 30 40 50 dec Higher efficiency when running all in low, than a few in high. The controls know this!

26. CONDENSING SOLUTION Efficiency charts for condensing boilers are fairly typical. Shown here is an example of how important load matching is to attain the advertised efficiency. Second ONLY to return water temperature.

27. CONDENSING SOLUTION

28. HYDROTHERM KN QUALITY True cast iron sections pre- assembled and fire-tested in the factory. Castings by age old foundry (aka. HB Smith – Boyerstown) No push nipples. Milled and sealed with top quality graphite gaskets!

29. HYDROTHERM KN MAINTENANCE Sections are replaceable (only 6 per boiler to worry about). Fireside cleaning should not be necessary with self correcting combustion. Counter flow design means no minimum water temperature, no thermal shock.

30. HYDROTHERM KN MAINTENANCE Set it and forget it combustion. No linkage or moving dampers. Ratio controlled auto correcting combustion system. Allows for Full Modulation and 5:1 turndown with as low as 2” w.c. of incoming gas pressure.

31. HYDROTHERM KN MAINTENANCE Familiar ignition system Powerful spark ignition (14K) Air dried reliability. UV flame sensing (most reliable and accurate). Heavy igniters easily accessed for alignment.

32. HYDROTHERM KN MAINTENANCE Standard combustion system including RM7800 series FSG. Instant response to changes in air (air VFD) Sealed combustion can increase your plant efficiency eliminating infiltration of cold air.

33. HYDROTHERM KN ADVANTAGE All stainless steel cabinets. Easy to rig and fits through standard doors. Standard controls such as Honeywell safety stats, relief valve, and low water cut offs mounted and external to easily check.

34. HYDROTHERM KN ADVANTAGE Plaque burner design fires in near silence. Flame view port at top of boiler.

35. HYDROTHERM KN ADVANTAGE Factory visit and training available. RME Tech’s factory trained and authorized for start up and warranty work. Contractor trained specifically on the KN boiler. Local Representatives surrounding you. Mestek backed!

36. WHO OWNS HYDROTHERM? Manufacturer of HVAC & Metal Forming Equipment Became a private company once again in 2006. Headquartered in Westfield, Massachusetts 25+ Locations Throughout US and Canada Approx. 3000 Employees Approx. $375 million in Sales HVAC Metal Forming

37. WHERE MESTEK STARTED Founded in Westfield, MA in 1946 as Sterling Radiator by John E. Reed 4 employees in a rented garage Produced only hydronic finned-tube heating element

38. WHO OWNS HYDROTHERM? MESTEK KNOWS THE HVAC INDUSTRY – THEY OWN ALL THESE GUYS!

39. MESTEK NATIONAL ACCOUNTS THESE GUYS TRUST US – SO SHOULD YOU!