Saving with Comfort

Confidential - 2 Note: This diagram can represent heating or cooling scenarios

1. Single thermostat systems are ineffective at providing comfort throughout the office building

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Sun ExposureTree Shade

Distance

Areas far from the thermostat are left at sub-optimal temperatures

Single thermostat systems cannot compensate for room specific factors

The Problem: Single thermostat systems are ineffective and inefficient

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The Problem: Single thermostat systems are ineffective and inefficient

2. Central forced air systems use more energy than required

Do not account for where or when energy is required

Energy is wasted on unoccupied rooms

The rooms in this representative building are empty 54% of the day

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Zone Control is the answer. Or is it ?

Zoning is expensive to retrofit

Tearing up ductwork and walls

Pulling control wires is a huge hassle

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Zoning Issues

Constant Volume Systems specifically require Bypass dampers

Bypass dampers are painful to install

They reduce system efficiency by 16%

California is going to ban them from 2014

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The Real problem then with traditional zone systems is that they are reactive!

Fully opening and closing dampers is like on and off a tap to adjust the flow of water while taking a shower…

Heating & Cooling is a slow process. After the temperature in a zone is in error, zoning systems use a larger input - fully opening or closing dampers to try overcome thermal inertia in a short time

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Every HVAC contractor balances the airflow in the building as part of the commissioning process.

However, the balancing is for a static set of conditions.

As the weather, occupancy and other loads change the balancing is no longer accurate

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What if we could make subtle changes to balancing dampers to dynamically balance the airflow within a building for the current set of conditions ?

Continuous commissioning should not be a buzzword…

Doing so however, requires we know in advance what the thermal loads are going to be in every part of the building since small control inputs require a longer time to overcome thermal inertia

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75F’s technology offers dynamic airflow balancing

1. Wireless Zone Controllers Provide per diffuser temperature control

2. Central Control UnitCloud powered Smart Algorithms control HVAC equipment and predictively balance airflow

3. Smart Dampers Modulate to control airflow

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Dynamic Balancing for Constant Air Volume System

Wireless Zone Controllers Provide per diffuser temperature control

Central Control UnitControl HVAC equipment and predictively

balance airflow

Smart Dampers Modulate to control

airflow

Supply air sensor Measure backpressure, supply air temperature

and CO2 levels

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How it works

• A wireless zone controller monitors the temperature in each zone, the damper position and airflow temperature and sends it to the Central Control Unit (CCU)

• The CCU collects the information from all the zones and sends it to servers in the cloud

• Powerful servers in the cloud crunch the data along with the current weather to create a thermal model of the building

• The algorithms predict the energy requirements of the zones during the day and the required damper positions

• The calculations are sent back to the CCU which sends the required damper control points to the zone controllers that move the smart dampers to the ideal position

• The CCU then turns on the HVAC cooling or heating coil

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1. Zone Module

Measures Zone and Airflow Temperature

Wireless communication (to CCU) enables easy installs

Controls 2 Smart Dampers

Available with Indoor Air Quality Measurement for Demand Based Ventilation

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2. Central Control Unit (CCU)

Consolidates real-time FSV data

Unified zone control and alerting

Controls HVAC equipment

Communicates with Cloud Servers

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3. Harnessing the power of the cloud

CCU sends the data to server farm for offline processing

Models building thermal envelope Anticipates energy requirements Predictively controls operating parameters

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4. Smart Dampers (SD)

Rotary Actuation mechanism

Easy drop-in installation cuts install time from 45minutes to 10 minutes

Simple cable run to FSV

Adjusted vent does not draw power

CE and UL rated

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The Result - Active Balancing

AfterBefore

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The Result - Active Balancing

After

Before

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The Result - Active Balancing

After

Before

System turn on

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Facility Managers have live insight

Facility Manager Web Portal All installations in one consolidated interface

Aggregate Multiple RTUs in same building

Energy Usage Data and Heat maps

Multi-Zone Scheduling & Status

Consolidated Alerting

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Installer portal – gives customer overview

Installer Web Portal Consolidated view of all customers

Auto populated from customers

Proactive fault alert to service tech

Prospective issues like insulation problems or duct leakage

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Account for humidity

Smart Comfort

and Mean Temperature of Radiation

Adjust the setpoint to compensate for perceived temperature rather than just ambient air temperature

Deliver comfort not just temperature control

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Demand Control Ventilation

Enhanced Savings thru best of breed strategies

Variable Speed Fan support

Occupancy Detection / Auto Away

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Only condition areas that need it. Prevent over-conditioning of areasOnly condition areas when they need it

Support for Variable Frequency Drive fan Support for Enthalpy EconomizersSupport for Demand based Ventilation

Active energy cost control through time of day energy usage (pre-cooling and weather forecast considerations)

Smart Savings

12-26% 1

24-35% 2

5-10% 3

1 - 75f Internal Study

2 - DOE Report - Energy Savings and Economics of Advanced Control Strategies for Packaged Air-Conditioning Units with Gas Heat

3 - 75f Internal Study

All estimates compared to a standard programmable thermostat operating as intended. Savings may be substantially higher if compared to a thermostat set to ‘hold’ or inefficiently programmed.

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Don’t take our word – empower users

User Reports “Kill” switch on CCU lets the system

operate as a ‘dumb’ thermostat

Users can toggle between the ‘dumb’ and ‘smart’ modes

Monthly report lets them visualize the correlation between system operation and comfort/ energy

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The Market

90% of commercial buildings in the US are light commercial and typically use Constant Volume Packaged Roof Top Units

That’s 4,300,000 buildings !

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Demand Deferral and Load Shift for Utilities Day Ahead Prices and Forecast Load

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A fundamental paradigm shift for the light commercial market

Better Comfort

Faster Installs for huge savings in labour

The smartest algorithms and most intuitive interfaces 40%

Savings Payback <3 years.

+Average Savings across climate zones. Savings may vary based on climate zone and HVAC equipment capabilities.

All estimates are compared to a standard programmable thermostat operating as intended. Savings may be substantially higher if compared to a thermostat set to ‘hold’ or inefficiently programmed.

Deepinder Singhdsingh@75fahrenheit.com313.486.4694