1. Brett Graham Habegger Corporation Midwest Regional Sustainability Summit May 1, 2015

2. Why Energy Recovery? Cost Benefits Downsize HVAC equipment Energy savings Favorable payback Rebates 2 Performance Benefits Humidity Control Decouple ventilation Part load performance Capture exhaust energy

3. RenewAire Core Construction Symmetrical Fully adhered Laminar airflow Single material 0% cross contamination Typical velocity 250 – 500 FPM.6” SP loss typical Not flammable!

4. RenewAire Core 71% sensible effectiveness 43% - 50% Summer Latent Effectiveness 52% - 59% Winter Latent Effectiveness 53% - 69% Total Effectiveness

5. Simple, Easy Maintenance  Particulate face loading clogs core face when core is not maintained  However, laminar flow is maintained through core passages  Simple vacuum procedure to core face to clean blockage and change filters  Do not wash core or remove from unit

6. ERV Certifications AHRI 1060 Effectiveness Purge air Cross-contamination Arbitrary airflow rating points UL 1812 Flammability rating

7. ERV Selection Criteria Ventilation and Exhaust Airflows External Static Pressure Design Conditions Electrical Control Strategy

8. 8 EV / BR Series HE Series 200 to 8000 CFM Indoor & rooftop applications No condensate drain ECM & VFDs available 70 to 450 CFM Indoor applications No condensate drain Residential/light- commercial

9. 9 LE Series CA/PA Series 3,000 to 8,800 CFM Indoor/Rooftop applications Multiple cores parallel Cost effective for larger airflows 500 to 40,000 CFM Applied Series Multiple cores parallel No blowers/motors

10. DOAS RD Series Energy recovery and tight humidity control 100% OA requirements DX / CW & HW Indoor / Rooftop Up to 4,400 CFM

11. OA EA RA FA (R) FA (V) Airflow Configurations 11 EA FA OA RA Indoor Horizontal Exterior Rooftop

12. Controls and Options Controls Digital time clock Motion (occupancy) control Carbon Dioxide control Dehumidistat Filter alarms Standard Features Transformer Relay Package Non-fused disconnect 2” standard MERV-8 filters Options Double wall Factory installed VFDs OA / FA motorized dampers Independent blower control Standard white paint Fused disconnect 2” MERV-13 filters

13. ERV Applications New construction: Preconditioning OA with ERV allows for downsized HVAC equipment New ERV technology is more reliable making downsizing more viable Oversized HVAC equipment is expensive and inefficient Reduce HVAC equipment cost Increase system efficiency Payback on ERV cost <5 yrs Annual energy savings

14. ERV Applications Retrofits & Renovations: Preconditioning OA with ERV can allow existing HVAC equipment remain unchanged Increases in outdoor air load without increasing the size of the equipment

15. ERV Benefits – Part Load HVAC equipment sized for <1% of year Ventilation is largest contributor Oversized HVAC is inefficient, ineffective and expensive Can lead to short cycling/humidity issues ERV can to reduce peak ventilation load HVAC equipment to better serve the needs INSIDE the space, not the outdoor conditions

16. ERV Benefits - Exhaust ASHRAE Standard 62.1-2010, Section 5.16.3.2.5 Class 2 air shall not be transferred in to Class 1 spaces Exception – When using an energy recovery device, recirculation from leakage (EATR), carryover or transfer (Purge air) from the exhaust side of the energy recovery device is permitted Not to exceed 10% Use RenewAire’s AHRI 1060 rated static plate core with no recirculation through the core for defrost 0% EATR 0% purge air

17. VRF System with ERV VRF fan coil units have strict EAT ranges Bringing in too much untreated outside air may cause the mixed EAT to be outside the acceptable range Using a zoned or central ERV can bring EAT to an acceptable temperature without needing a full DOAS system! Typical Heating EAT Range 59°F DB 81°F DB Typical Heating EAT Range 59°F DB 81°F DB Typical Cooling EAT Range 59°F WB 75°F WB Typical Cooling EAT Range 59°F WB 75°F WB

18. Without ERV: Unacceptable EAT With ERV: Acceptable EAT VRF System with ERV Typical Heating EAT Range 59°F DB 81°F DB Typical Heating EAT Range 59°F DB 81°F DB

19. Rooftop ERV 19

20. Thank You!