UltraGas ® Competitors comparison. Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich2 Contents Ygnis Modulo-Control Varino Varino Grande. - презентация

1 UltraGas ® Competitors comparison

2 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich2 Contents Ygnis Modulo-Control Varino Varino Grande Viessmann Vitocrossal 200 CM2 Vitocrossal 300 CU3 Vitocrossal 300 CT3 Vitocrossal 300 CR3 Buderus Logano plus SB315 VM Logano plus GB312 Logano plus SB615/735 Logano plus SB825 Logano plus GB434 Riello TAU UNIT TAU N ICI CALDAIE MONOLITE JB Elco – Rendamax Trigon S / L Rendamax 600 Rendamax 2900 / 3500 Remeha – DeDietrich Gas 210 ECO Gas 310 ECO Gas 610 ECO Vaillant ecoVIT ecoCRAFT Brötje Eurocondens SGB Wolf (Centrotec) MGK MHG ProCon HT 150/2256 Hamworthy Fleet Fleet

3 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich3 Contents Comparison electrical power consumption Gas consumption Comparison HT return UltraGas ® benefits

4 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich4 Ygnis Modulo-Control Varino Varino Grande

5 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich5 Ygnis Modulo Control ( kW) Modulo Control ( kW) Advantages against UltraGas ® : None Disadvantages against UltraGas ® : Vertical water tubes Horizontal gas flow No stratisfaction No HT return Modulation % Only 0.4 l/kW water volume M220 – kW, 90 Litre, 10 mbar dp at dT20 M270 – kW, 115 Litre, 14 mbar dp at dT20

6 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich6 Design Modulo Control Control panel with elect. burner management Control panel Premix chamber Stainless steel double tube heat exchanger Modulating burner Burner chamber Stainless steel burner heat exchanger

7 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich7 Ygnis Varino Varino ( kW) Advantages against UltraGas ® : Large modulation range (1:8 – 1:12) O 2 -reset (also balances combustion temperature drift) Disadvantages against UltraGas ® : Complex and unreliable burner design (O 2 - sensor, glow ignition, actuators) Complex heat exchanger design Expensive, especially up to 150 kW Since the production moved to France very big problems with leak tightness of the boiler body No certified twin boiler units with overpressure in the stack

8 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich8 Burner actuator The patented variable geometry burner

9 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich9 Power Modulation 10 % power50 % power100 % power

10 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich10 Cross Section Varino O 2 sensor Condensate heat exchanger LT return HT return Flow Burner with variable surface

11 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich11 O 2 sensor O 2 sensor is very sensitive Replace every year necessary

12 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich12 Design Varino Naturzirkulation Kondensator aus Edelstahl-Glattrohren Patented burner Control panel with elect. burner management Fan with variable speed Rauchgasberührte Teile am Kesselkörper aus Edelstahl

13 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich13 Ygnis Varino Grande Varino Grande ( kW) Advantages against UltraGas ® : Large modulation range (1:8 – 1:12) O 2 -reset (also balances combustion temperature drift) Disadvantages against UltraGas ® : Complex and unreliable burner design (O 2 - sensor, glow ignition, actuators) Complex heat exchanger design Expensive Since the production moved to France very big problems with leak tightness of the boiler body No certified twin boiler units with overpressure in the stack

14 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich14 Cross Section Varino Grande LT return HT return Flow Condensate heat exchanger O 2 sensor Burner with variable surface

15 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich15 Design Varino Grande

16 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich16 Disassembled Version Condenser Burner chamber

17 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich17 Viessmann Vitocrossal 200 CM2 Matrix Vitocrossal 200 CT2 Matrix Vitocrossal 300 CU3 Vitocrossal 300 CT3 Vitocrossal 300 CR3

18 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich18 Viessmann Vitocrossal 200 Vitocrossal 200 CM2, CT2 MatriX ( kW) Vitocrossal 200 CM2, CT2 MatriX D ( kW) Advantages against UltraGas ® : None Disadvantages against UltraGas ® : MatriX-burner modulation just 1:3 (42-100%) although a venturi system is used Doesn't have a high-temperature return Because of the inclined position of the heat exchanger surface no ideal stratification is achieved – baffles are necessary in the rear of the boiler to achieve a cold area Condensate pipeline from the furnace to the condensate collection box and drain

19 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich19 Viessmann Vitocrossal 300 Vitocrossal 300 CU3 MatriX (27-66 kW) Vitocrossal 300 CM3 MatriX ( kW) Advantages against UltraGas ® : C(x) – Zulassung bis 66 kW Disatvantage against UltraGas ® : MatriX-burner modulation just 1:3 Very expensive heat exchanger design in this small capacity range

20 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich20 Viessmann Vitocrossal 300 CT3 Vitocrossal 300 CT3 ( kW) Vitocrossal 300 CT3 ( kW mit VMB) Advantages against UltraGas ® : Easy to bring in Disadvantages against UltraGas ® : Only obtainable with pressure jet burners High service costs for the burner (large number of wearing parts) High flue gas emissions (pressure jet burner) Reduced modulation High flue side sound power emissions Sound insulation necessary (investment costs) Large footprint because of pressure jet burner (swivelling boiler door for service – side clearance) and sound insulation Small flue side overpressure (large stack dimensions) No certified twin boiler units with overpressure in the stack Difficult access to the heat exchanger (inspection)

21 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich21 Viessmann Vitocrossal 300 CR3 Vitocrossal 300 CR3 ( kW) Advantages against UltraGas ® : Small height Disadvantages against UltraGas ® : Only obtainable with pressure jet burners High service costs for the burner (large number of wearing parts) High flue gas emissions (pressure jet burner) Reduced modulation High flue side sound power emissions Sound insulation necessary (investment costs) Very high electrical power consumption (running costs) Large footprint because of pressure jet burner (swivelling boiler door for service – side clearance) and sound insulation Small flue side overpressure (large stack dimensions) No certified twin boiler units with overpressure in the stack Difficult access to the heat exchanger (inspection)

22 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich22 Buderus Logano plus SB315 VM Logano plus GB312 Logano plus SB615/735 Logano plus SB825 Logano plus GB434

23 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich23 Buderus Logano plus SB315 Logano Plus SB315 VM ( kW) Advantages against UltraGas ® : None Disadvantages against UltraGas ® : Pre-mix burner modulation just 1:3 Very expensive heat exchanger design in this small capacity range Large footprint

24 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich24 Buderus Logano plus GB312 Logano Plus GB312 ( kW) Advantages against UltraGas ® : Boiler (cheap) ancillaries (pump, piping etc.) make it expensive Disadvantages against UltraGas ® : Aluminium-Silicon heat exchanger (St.e. just 108%) No separate high temperature return Small water volume Minimum water flow (hydraulic balancer - design expense - condensing (not condensation) efficiency is negatively affected Shunt pump necessary (efficiency!!) Very high electric power consumption of the shunt pump (running costs) Danger of leakage because of segment design Waterside Aluminium – danger of corrosion and erosion Danger of sludge collection in the heat exchanger Very critical on mixed material installations System separation with PHE on extreme conditions Large required floor space for twin boiler units

25 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich25 Buderus Cascades Logano Plus GB312 Cascades ( kW) twin boilers

26 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich26 Buderus Logano plus GB402 Logano Plus GB402 ( kW) Advantages against UltraGas ® : Boiler (cheap) ancillaries (pump, piping etc.) make it expensive Disadvantages against UltraGas ® : Aluminium-Silicon heat exchanger No separate high temperature return Small water volume Minimum water flow (hydraulic balancer - design expense - condensing (not condensation) efficiency is negatively affected Shunt pump necessary (efficiency!!) Very high electric power consumption of the shunt pump (running costs) Danger of leakage because of segment design Waterside Aluminium – danger of corrosion and erosion Danger of sludge collection in the heat exchanger Very critical on mixed material installations System separation with PHE on extreme conditions Large required floor space for twin boiler units

27 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich27 Buderus Logano plus SB615,735 Logano Plus SB615 VM ( kW) Logano Plus SB615 ( kW) Logano Plus SB735 ( kW) Advantages against UltraGas ® : None Disadvantages against UltraGas ® : Pre-mix burner modulation just 1:3 Up from 350 kW just available with pressure jet burner With pressure jet burner High service costs for the burner (large number of wearing parts) High flue gas emissions (pressure jet burner) Reduced modulation High flue side sound power emissions Sound insulation necessary (investment costs) Very high electrical power consumption (running costs) Large footprint because of pressure jet burner (swivelling boiler door for service – side clearance) and sound insulation Small flue side overpressure (large stack dimensions) No certified twin boiler units with overpressure in the stack Difficult access to the heat exchanger (inspection)

28 Buderus Logano Plus SB 745 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich28 Logano Plus SB 745 ( kW) Advantges in comperison UltraGas ® None Disadvantages to the UltraGas ® : large footprint Heat loss rate Logano plus SB 745: 0.2%, UltraGas ® : 0.12% Lower feed pressure at the combustion air /flue gas pipe Logano plus SB 745: 50 Pa, UltraGas ® : 130 Pa Pressure jet burner High service costs for the pressure jet burner (more spare parts) Higher emission rate (pressure jet burner) Logano plus SB 745: 70 mg/kWh, UltraGas ® : 35 mg/kWh Smaller modulation rate: Logano plus SB 745: 1: 3, UltraGas ® : 1: 6 Higher exhaust noise level Therefore, acoustic measures are necessary (investment costs ) Very high electrical energy consumption (operating cost)

29 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich29 Buderus Logano plus SB825L Logano Plus SB825L ( kW) Logano Plus SB825L LN ( kW) With add on stainless steel heat exchanger Hydraulic resistance 200 mbar Low efficiency: Return - temperature 30°C: Fluegas temperature:106°C – 110°C Return - temperature 60°C: Fluegas temperature:120°C – 130°C

30 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich30 Buderus Logano plus GB434

31 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich31 Buderus Logano plus GB434 Logano Plus GB434 ( kW) Advantages against UltraGas ® : Boiler (cheap) ancillaries (pump, piping etc.) make it expensive Easy to bring in Disadvantages against UltraGas ® : 4-step burner, 2 blocks with 2 steps each Small flue side overpressure (large stack dimensions) CO 2 -value just at % (low dew point) Complex hydraulic implementation Boiler circle with + separate condensing circle with additional pump (3.5 m 3 /h) High hydraulic resistance considering both heat exchangers Cast-iron heat exchanger with add on heat exchanger Standard efficiency up to 106 % (Buderus numbers)

32 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich32 Riello TAU UNIT TAU N

33 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich33 Riello TAU UNIT TAU UNIT ( kW) Advantages against UltraGas ® :... Disadvantages against UltraGas ® :...

34 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich34 Burner

35 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich35 Riello TAU N TAU N ( kW) Advantages against UltraGas ® :... Disadvantages against UltraGas ® :...

36 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich36 Design

37 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich37 ICI CALDAIE ICI MONOLITE JB ( kW) Advantages against UltraGas ® :... Disadvantages against UltraGas ® :...

38 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich38 Design

39 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich39

40 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich40

41 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich41 Elco – Rendamax – Ecoflam - MHS Trigon S / L Rendamax 600 Rendamax 3600/3500 Rendamax 3400

42 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich42 Trigon Trigon S (10-44 kW) Trigon L ( kW) Advantages against UltraGas ® : Cheap (Giannoni heat exchanger !!!!) Small C(x) certification Disadvantages against UltraGas ® : Small water volume Very high hydraulic resistance Minimum water flow (hydraulic balancer - design expense - condensing (not condensation) efficiency is negatively affected Built in shunt pump (efficiency) Very high electric power consumption of the shunt pump (running costs) No separate high temperature return Danger of sludge collection in the heat exchanger System separation with PHE on extreme conditions Danger of leakage because of segment design

43 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich43 Rendamax 600 Rendamax 600 ( kW) Advantages against UltraGas ® : Cheap Small Disadvantages against UltraGas ® : 103.9% at 40/30 °C and full load, UltraGas ® 106.5% Small water volume Very high hydraulic resistance Minimum water flow (hydraulic balancer - design expense - condensing (not condensation) efficiency is negatively affected Built in shunt pump (as internal pump in the bypass – efficiency!) Very high electric power consumption of the shunt pump (running costs) Separate high temperature return optional, water flow very much restricted (see p. 43) Danger of sludge collection in the heat exchanger System separation with PHE on extreme conditions Danger of leakage because of segment design No certified twin boiler units with overpressure in the stack

44 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich44 Rendamax 3600 / 3500 Rendamax 3600 ( kW) (UK) Rendamax 3500 ( kW) (CH, D, A) Advantages against UltraGas ® : Cheap Disadvantages against UltraGas ® : 3600 (102.7% at 40/30 °C and full load, UltraGas ® 106.5%) 3500 (95.5% at 40/30 °C and full load, UltraGas ® 106.5%) Very small water volume Very high hydraulic resistance Minimum water flow (hydraulic balancer - design expense - condensing (not condensation) efficiency is negatively affected Built in shunt pump (as internal pump in the bypass – efficiency!) Very high electric power consumption of the shunt pump (running costs) Separate high temperature return optional, water flow very much restricted (see p. 43) Danger of sludge collection in the heat exchanger System separation with PHE on extreme conditions Danger of leakage because of segment design No certified twin boiler units with overpressure in the stack

45 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich 45 Rendamax 3400 Rendamax 3400 ( kW) Advantages against UltraGas ® : Cheap Disadvantages against UltraGas ® : No condensing boiler!!! (94.3 % at 40/30 °C and full load, UltraGas ® %) No modulation!!! Minimum operating pressure 1.5 bar Very small water volume Very high hydraulic resistance Minimum water flow (hydraulic balancer - design expense - condensing (not condensation) efficiency is negatively affected Built in shunt pump (as internal pump in the bypass – efficiency!) Very high electric power consumption of the shunt pump (running costs) No separate high temperature return Danger of sludge collection in the heat exchanger System separation with PHE on extreme conditions Danger of leakage because of segment design No certified twin boiler units with overpressure in the stack

46 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich46 Hydraulic schematic

47 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich47 Hydraulic schematic

48 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich48 Elco – Rendamax – Ecoflam - MHS

49 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich49 DeDietrich Remeha Gas 210 ECO Gas 310 ECO Gas 610 ECO

50 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich50 Main problems with aluminium heat exchanger built in segments: Water channels are parallel connected Blocking of the water channels if there is sludge in the heating water Hot spot corrosion Boiling on the water side if the water flow is to low The aluminium gets soft if the pH – Value of the heating water is greater than 9 At points with high flow velocity of the heating water the aluminium will be reduced (wall thickness of the heat exchanger) Competitor analyses with aluminium heat exchanger

51 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich51 Water channels are parallel connected Blocking of the water channels if there is sludge in the heating water. If there is sludge in one channel, the water flow through this channel is reduced. More sludge will be deposite in this channel. Till there goes to less water through this channel. The heatexchanger will be leaking because the cooling through the water is too low ! Competitor analyses with aluminium heat exchanger

52 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich52 Flue gas side 800 – 1000 °C needle fins Boiling water aprox. 140°C (hot point) At the boiling point the protective oxide coating is destroyed ! In this case aluminium has no protection and little holes will develope ! In the holes the temperature rises because of a bad cooling. water side 70 °C aluminium heatexchanger Protektive oxide coating Hole inside of the aluminium heatexchanger Hot spot corrosion Boiling on the water side if the water flow through the heat exchanger is to low ! Competitor analyses with aluminium heat exchanger

53 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich53 Soft aluminium Competitor analyses with aluminium heat exchanger The aluminium gets soft if the pH – value of the heating water is greater than 9. At points with high flow velocity of the heating water the aluminium will be reduced (wall thickness of the heat exchanger) The pH – value range of the heating water for aluminium heatexchanger should be between 8.5 and 9. This is a very small range. If the water is descalted inhibitors are necessary. In this case the water quality should be checked every year. With inhibitors the water quality is very sensitive. The pH - value could be very fast out of the range ! If the pH-value is lesser than 8.5 the water is aggressive. There is material reduction in all steel pipes of the heating system. This material causes deposits in the boiler and blocks water channels.

54 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich54 To protect the heat exchanger the supplyer try to use special measurements: If the T between flow and return is greater than e.g. 25°K the power of the burner will bereduced. If the T between flow and return is greater than e.g. 35°K the power of the burner will be shut down. A lot of start and stops. This reduces the efficiency ! Competitor analyses with aluminium heat exchanger

55 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich55 DeDietrich Remeha Gas 210 ECO Gas 210 ECO ( kW) Advantages against UltraGas ® : Boiler (cheap) ancillaries (pump, piping etc.) make it expensive Small footprint Disadvantages against UltraGas ® : Small water volume Very high hydraulic resistance Minimum water flow (hydraulic balancer - design expense - condensing (not condensation) efficiency is negatively affected Shunt pump necessary (efficiency!) Very high electric power consumption of the shunt pump (running costs) Danger of leakage because of segment design Waterside Aluminium – danger of corrosion and erosion Danger of sludge collection in the heat exchanger Very critical on mixed material installations System separation with PHE on extreme conditions No certified twin boiler units with overpressure in the stack New Venturi system, modulation 1:5

56 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich 56 DeDietrich Remeha Gas 310 ECO Gas 310 ECO ( kW) Advantages against UltraGas ® : Boiler (cheap) ancillaries (pump, piping etc.) make it expensive Small footprint (wheels to push like a barrow) Disadvantages against UltraGas ® : Small water volume Very high hydraulic resistance Minimum water flow (hydraulic balancer - design expense - condensing (not condensation) efficiency is negatively affected Limitation of the max. water flow rate (ΔTmin. = 9 K) Shunt pump necessary (efficiency!) Very high electric power consumption of the shunt pump (running costs) Danger of leakage because of segment design Waterside Aluminium – danger of corrosion and erosion Danger of sludge collection in the heat exchanger Very critical on mixed material installations System separation with PHE on extreme conditions

57 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich57 DeDietrich Remeha Gas 610 ECO Gas 610 ECO ( kW) Doppelkessel Advantages against UltraGas ® : Boiler (cheap) ancillaries (pump, piping etc.) make it expensive Small footprint (wheels to push like a barrow) Disadvantages against UltraGas ® : Small water volume Very high hydraulic resistance Minimum water flow (hydraulic balancer - design expense - condensing (not condensation) efficiency is negatively affected Limitation of the max. water flow rate (ΔTmin. = 9 K) Shunt pump necessary (efficiency!) Very high electric power consumption of the shunt pump (running costs) Danger of leakage because of segment design Waterside Aluminium – danger of corrosion and erosion Danger of sludge collection in the heat exchanger Very critical on mixed material installations System separation with PHE on extreme conditions

58 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich58 Vaillant ecoVIT ecoCRAFT

59 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich59 Vaillant ecoVIT ecoVIT (23-65 kW) Advantages against UltraGas ® : C(x) certification up to 65 kW Multi sensory – system – CO 2 -sensor, combustion control like ecotec exclusive Disadvantages against UltraGas ® : Pre-mix burner modulation just 1:3

60 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich60 Vaillant ecoCRAFT ecoCRAFT ( kW) Advantages against UltraGas ® : Boiler (cheap) ancillaries (pump, piping etc.) make it expensive Small footprint, if system separation is considered Disadvantages against UltraGas ® : Very small water volume Very high hydraulic resistance Minimum water flow (hydraulic balancer - design expense - condensing (not condensation) efficiency is negatively affected Shunt pump necessary (efficiency!) Very high electric power consumption of the shunt pump (running costs) No separate HT-return (efficiency) Danger of leakage because of segment design Waterside Aluminium – danger of corrosion and erosion Danger of sludge collection in the heat exchanger system separation in A necessary, in D not, in CH?) No certified twin boiler units with overpressure in the stack

61 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich61 Unical MODULEX MODULEX ( kW) Advantages against UltraGas ® : Boiler (cheap) ancillaries (pump, piping etc.) make it expensive Small footprint, if system separation is considered Disadvantages against UltraGas ® : Very small water volume Very high hydraulic resistance Minimum water flow (hydraulic balancer - design expense - condensing (not condensation) efficiency is negatively affected Shunt pump necessary (efficiency!) Very high electric power consumption of the shunt pump (running costs) No separate HT-return (efficiency) Danger of leakage because of segment design Waterside Aluminium – danger of corrosion and erosion Danger of sludge collection in the heat exchanger No certified twin boiler units with overpressure in the stack

62 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich62 Unical MODULEX

63 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich63 Brötje (Baxi Group) Eurocondens SGB ( kW) Twin boiler SGB (X) ( kW) Advantages against UltraGas ® : Boiler (cheap) ancillaries (pump, piping etc.) make it expensive Small footprint Disadvantages against UltraGas ® : Very small water volume High hydraulic resistance Minimum water flow (hydraulic balancer - design expense - condensing (not condensation) efficiency is negatively affected Shunt pump necessary (efficiency!) Very high electric power consumption of the shunt pump (running costs) Danger of leakage because of segment design Waterside Aluminium – danger of corrosion and erosion Danger of sludge collection in the heat exchanger Very critical on mixed material installations System separation with PHE on extreme conditions

64 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich64 Wolf (Centrotec) MGK ( kW) Advantages against UltraGas ® : Boiler (cheap) ancillaries (pump, piping etc.) make it expensive Small footprint Disadvantages against UltraGas ® : Very small water volume

65 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich65 MHG ProCon HT 150/225 ( kW) Advantages against UltraGas ® : Boiler (cheap) ancillaries (pump, piping etc.) make it expensive Small footprint Disadvantages against UltraGas ® : Very small water volume

66 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich66 Hamworthy Fleet Fleet H Single module: F40H – F350H Two high modules:F40V-80 – F350V-700 Three high modules: F40V F350V-1050 Adv antages against UltraGas ® : Boiler (cheap) ancillaries (pump, piping etc.) make it expensive Small footprint, if system separation is considered Disadvantages against UltraGas ® : Very, very small water volume (< 0.05 – 0.1 l/kW) Very high hydraulic resistance Very high electrical consumption because of the primary pump (running costs) Electricity costs: from up to £/a higher than UltraGas ! Minimum water flow: A hydraulic switch is necessary ! This causes in combination with the primary pump a higher return temperature (up to 5°C, this reduces the efficiency about 1.5%)

67 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich67 Hamworthy Fleet Fleet H Single module: F40H – F350H Two high modules: F40V-80 – F350V-700 Three high modules: F40V F350V-1050 Disadvantages against UltraGas ® : No separate HT-return (efficiency) This could reduce the efficiency of this boiler up to 6% ! Danger of leakage because of segment design Waterside Aluminium – danger of corrosion and erosion Danger of sludge collection in the heat exchanger system separation. No certified twin boiler units with overpressure in the stack Exampel: UltraGas (350) versus F350 H Annual efficiency:UltraGas (350): 102 % F350V-700: 98 % Annual gas consumption: m 3 /a Annual gas saving with UltraGas: m 3 /a Gas price: 0.5 £/m 3 Cost saving UltraGas (gas): 1000 £/m 3 Cost saving UltraGas (electricity): 180 £/a

68 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich68 Water Flue gas Efficiency Behaviour 80/60 °C Efficiency behaviour at connection type Heating 80/60 °C Use low temperature return (LT return) 100% = 96% at 100% load 80°C 60°C

69 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich69 Water Flue gas Efficiency Behaviour 40/30 °C Efficiency behaviour at connection type Heating 40/30 °C Use low temperature return (LT return) 100% = 105% at 100% load 40°C 30°C

70 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich70 Water Flue gas Efficiency Behaviour 80/60/30 °C Efficiency behaviour at connection type Heating 80/60 °C and 40/30 °C Use HT return 60 °C (RL HT = 90-95%) und NT- return 30 °C (RL NT = 5-10%) 100 % 5-10% 90-95% = % at 100% load The mixed return temperature Would be 58.5 °C => 96% 80°C 30°C 60°C

71 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich71 Efficiency Behaviour with Modulation BLUE Efficiency increase with separated return HT-Return 60 °C (Return HT = 90-95%) and LT-Return 30 °C (Return LT = 5-10%) RED Efficiency increase with boiler cascading 2 boilers at 50% load instead of 1 boiler at 100% load 2x50% 1x100% Separate return Common return

72 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich72 Comparison HT return High temperature return Hoval UltraGas ® Ygnis Varino and Varino Grande Viessmann Vitocrossal 300 Buderus SB Serie Vaillant ecoVit (23-65) Elco Rendamax R600, R3500, R3600 (option) No high temperature return Viessmann Vitocrossal 200 Buderus GB Serie Remeha (yes – but not working!) Vaillant ecoCRAFT Brötje Eurocondens Wolf Elco Rendamax R3400

73 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich73 Gas Consumption Rough estimated gas consumption: Boiler capacity x 1700 h/a = kWh/a gas consumption example: 200 kW x 1700 h/a = kWh/a Gas consumption[kWh] x difference in efficiency = difference in consumption Example at 1% Diff.: kWh/a x 0.01 = 3400 kWh/a 3400 kWh/a = 340 m 3 /a Gas Appears: generally bad efficiency or higher return temperature with a shunt pump. 1 Litre Oil = 1 m 3 Gas = 10 kWh

74 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich74 Summary Considering the overall quantities the UltraGas ® ( D) is the best Gas condensing boiler, on the market. High modulation with reliable burner system High reliability - moving parts are fan and valve High efficiency Up to 1440 kW as unit with pre-mix burner Certified double-boiler units UltraGas ® (250D-1440D) with common flue in overpressure design Ultraclean ® burner system from kW Low emissions from kW Low noise level from kW (especially flue side)

75 Hoval Aktiengesellschaft / Aug-13 UltraGas® - Wettbewerbsvergleich75 Summary Considering the overall quantities the UltraGas ® ( D) is the best Gas condensing boiler, on the market. Compact design Large water volume No minimum water flow Minimum hydraulic resistance aluFer ® - high grade steel heat exchanger from kW No waterside Aluminium, but high grade steel Very simple service Simple purification of the aluFer ® - tubes Minimum electrical power consumption

76 Thank you for your attention. Technologically superior indoor climate control solutions from the Alps. Technologically superior indoor climate control solutions Thank you for your attention.