Engineer Presentation

Efficiency - GAS

Clamshell Heat Exchanger 80% Efficient

Typical two furnace unit 1700 °F 400 °F

Typical two furnace unit 20°F 70°F120°F 80% Efficient 75% Efficient

Air Stratification - Typical Heat Exchanger Heat Exchanger °F ΔT

Tubular Heat Exchanger 82-83% Efficient 1700 °F 350 °F

Primary Secondary 93% Efficient 91% Efficient 1700 °F 150 °F

Sizing - Series 20°F 70°F120°F 91% Efficient 86% Efficient

Sizing - Parallel 300 MBH input 600 MBH input 91% Efficient

Air Stratification – High Efficiency Heat Exchanger ??? °F ΔT Heat Exchanger

Minimum Turn Down Limitation Single Stage VS Modulation The minimum turn down must be set to ensure condensing in the secondary heat exchanger or both heat exchangers must be made out of stainless steel. The Power Venter/Draft Inducer’s airflow directly affects the gas to air ratio at the burner. The ratio must be set to keep Air Free CO below 400 PPM.

Minimize footprint while maximizing efficiency. Maximum efficiency at the widest range of ambient & design conditions. Maximizing user comfort while minimizing operating cost. VAV minimum CFM is now limited by the supply fan instead of heat exchanger. No stratification issues. “Green” unit/minimize emissions Why Hydronic?

Xcelon w/ Integral Condensing Boiler 1700 °F 100 °F 140 °F 90 °F

Air Stratification - Heating Hot Water Coil

Constant Discharge Temperature

Performance 93% thermal efficiency per BTS2000. With a discharge air temperature set at 70 degrees, that efficiency increases to 98% efficient. Fully modulating gas valves. – 10:1 turndown ratio Closed Hydronic Loop requiring no water connections at the roof. Only connections are gas, electricity and ductwork. – Glycol Mix protects the unit to -20°F Extreme Cold Weather Kit Option protects unit to -30°F

Performance

The maximum allowed CO is 400 PPM CO (Air Free) Variable speed power venter High fire should be between % for CO2 and below the maximum 150 PPM for CO. Low fire should be between % for CO2 and below the maximum 150 PPM for CO.

Efficiency - ELECTRICAL

Clamshell - Static Pressure A typical Clamshell Heat Exchanger can have a static pressure drop of 1.12” per furnace. This can result in a total static pressure of over 3” through the furnace sections.

Xcelon – Hot Water Coil Regardless of the BTU input and CFM selected, the hot water coil was carefully selected to keep the air pressure drop below 0.5” of static. This can result in a reduction in motor horse power by up to two sizes. Further adding to the electrical savings, all units come with a VFD as standard.

Cooling Coil Bypass In cooling mode the bypass damper is closed forcing the air through the cooling coil. When not in cooling mode, the bypass damper opens to reduce the internal static pressure of the unit. Cooling Coil Bypass Damper

Integral Cooling with Dehumidification - Phase 2 A separate heat exchanger is used to transfer the heat from the Saturated Liquid Refrigerant into the Glycol Loop. – This results in the R-410A refrigerant being sub- cooled which improves the cooling efficiency. – This also allows the existing hot water coil to be re-used to reheat the air.

Efficiency – Heat Recovery

Heat Recovery Layout Boiler Motor VFD & Transformer Pumps This recovered waste heat increases the efficiency by 1 + %

Additional Features

Cincinnati Fan

Spring Isolators

Piping

Condensate Integral condensate trap designed to drain in the event of a power failure. Condensate Neutralizer as a factory installed optional accessory. Optional Dedicated heat trace power supply for long condensate runs.

Controls - Overview 1.Call for heat is received. 2.Dampers open and prove. 3.Burners turn on. 4.After glycol mix reaches temperature, VFD slowly ramps up. 5.Glycol mix temperature is varied to maintain constant discharge temperature. 6.(Optional) if the unit is unable to maintain discharge temperature, it reduces the CFM until discharge temp is satisfied.

Controls - Boiler The PID loop looks at the Propylene Glycol mix temperature, the discharge air temperature and rate of change. HRT Controls are configured to run the first burner to 50% fire then turn on the second burner. True run time monitoring

Controls - Safeties Boiler – High Limit, Low Water Cutoff, Ignition Control Fault and Software Operator Limit  Per code, unit complies with CSD-1. Air Side – VFD Temperature Status and Damper Prove

Controls - HRT

Controls –

Service Designed with ease of service in mind. – Isolation valves for ease of boiler service Boiler is on a track for ease of repair. – Service lights standard on all units. – Optional Convenience Outlet available. – Optional Clogged Filter Switch. – External Control Terminal Strip on exterior of unit for ease of Thermostat wiring.

Roof Cap The roof cap of the outdoor unit is sloped to prevent standing water on top of the unit. It should be noted that underneath the roof cap is that actual roof of the unit which is a same panel construction as the walls (with the same R-value)

LEED Credits

Credit Contribution CreditApplies toCredit NameDescription For Xcelon Possible Points EA NC, CS, S, R, DC, WD, H, HC Minimum Energy Performance Demonstrate an improvement of 5% for new construction, 3% for major renovation or 2% for core and shell projects in building performance rating compared to baseline. Prerequisite EA NC, CS, S, R, DC, WD, H, HC Fundamental Refrigerant Management Do not use CFC based refrigerants.Prerequisite EA NC, CS, S, R, DC, WD, H, HC Optimize Energy Performance Credit based on percentage improvement in energy performance over prerequisite (S) 1-20 (HC) 1-18 (Others) MRHC PBT Source Reduction - Lead, Cadmium & Copper No lead or cadmium and for copper pipe use mechanically crimped copper joint systems or solder joints per ASTM B and flux per ASTM B

CreditApplies toCredit NameDescription For Xcelon Possible Points EQ NC, CS, S, R, DC, WD, H, HC Minimum Indoor Air Quality Performance Meet the minimum requirements for ASHRAE Prerequisite EQ NC, CS, S, R, DC, WD, H, HC Enhanced Indoor Air Quality Strategy Have MERV 13 filters.1-2 EQ NC, CS, S, R, DC, WD, H, HC Thermal Comfort Design HVAC System and Building Envelope to meet requirements of ASHRAE IN NC, CS, S, R, DC, WD, H, HC InnovationExceptional or innovative performance.1-5 Credit Contribution

CreditApplies toCredit NameDescription EA NC, CS, S, R, DC, WD, H, HC Fundamental Commissioning and Verification Develop commissioning plan and hire commissioning agent. EA NC, CS, S, R, DC, WD, H, HC Demand Response Design the building and equipment with 10% load shedding or shifting during peak demand from utility company. EQ NC, CS, S, R, DC, WD, H, HC Construction Indoor Air Quality Management Plan During construction, meet SMACNA IAQ guidelines, protect absorptive material from moisture damage, do not operate permanently installed air-handling equipment during construction unless MERV 8 filters are install on all return air grills, and prohibit smoking. EQ NC, CS, S, R, DC, WD, H, HC Indoor Air Quality Assessment Install new filters after construction and flush-out building by supplying a total air volume of 14,000 cubic feet of outdoor air per square foot of gross floor area with the space temperature between 60-80⁰F and relative humidity of less than 60%. Or test air quality after construction but before occupancy. Contractor & Commissioning Credits

Performance – Max Discharge 140 ⁰ F, Max temperature rise 100 ⁰ F. – 4, ,000 CFM Able to handle 3” of external static pressure – 800 – 1,600 MBH Initial offering – 4,501 to 10,000 CFM – 800 & 1,200 MBH

Beta Sites Chicago, IL Turano Bakery (Bakery) Wakefield, MA Blanchard Grinding Service (Sheet metal shops) Stoughton, WI – Has 3 beta sites: Stark Automotive (Served the Automotive bays of the repair shop) NAFA(Tannery Factory) – Has Two units in two buildings Mississauga, ON, Canada – Has 3 beta sites: Apartment complex 2095 Roche Court Mississauga, ON, Canada Apartment complex – 2 Units installed here 2 Armel Court Toronto, ON, Canada

Questions