DEMAND CONTROLLED CIRCULATION FOR CENTRAL DOMESTIC HOT WATER

ICC & IAPMO CODE COMPLIANTSIGNIFICANT UTILITY SAVINGS

ENERGY LOSSES IN A CENTRAL DOMESTIC HOT WATER SYSTEM

Approximately 65% of the total energy used in a CDHW system is lost through inefficiencies in

the heating and distribution.

As much as 34% is lost in the recirculation loop, primarily from excessive pump operation.

Most property owners and managers under-evaluate the cost of

constant pump operation by only considering the retail price

(~$400)

The actual (hidden) costs of operating a pump continuously in a

multi-unit building are quite staggering, especially when added

up over the average life (3-5 years) of the product.

THE REALITY OF NOT USING Additional gas used

for water heater

$500-$1000

Longterm Costs

Water Heater LossesCirculation Loop Losses(Distribution Losses)

End-Use Energy(i.e. Hot Water)

%31%34

%35

Mechanical Room

Cold WaterSupply

Hot Water Supply

Hot Water Return

Branch

DecreasedProperty Value(Cost Varies)

Retail Price$400

Purchase Price(The Tip of the Iceberg)

The cost to purchase a pump is only the tip of

the iceberg. Over 90% of the true cost comes 

after the purchase is made, in the way 

of energy losses and other operational costs.

$200-$300

Additional electricityused for pump

Extra Wear and Tear to the Heating System

(Cost Varies)

THE SOLUTION: Operate Your Distribution with

THE ENOVATIVE SYSTEM "the best demand controlled hot water circulation system available that works in commercial and multifamily buildings."

A pump only needs to run when hot water is not

available, AND when someone is using a hot water

fixture – THIS is called recirculating your

hot water on-demand.

Pumping on demand will:

Put an end to the energy & cost intensive effects of

running the pump when it’s not needed.

Reduce your maintenance costs by extending the

life of your water heating system, from the pipes,

to the tanks, to the water heaters.

Recirculation on-demand is the best balance

between getting hot water quickly while not

wasting energy and overworking

the water heating system.

Annual Costs

Do you keep your lights on when you leave your home?

A pump doesn’t need to run when no one is using hot water.

Do you turn on your lights when there is available sunlight?

A pump doesn’t need to run when hot water is already available

TURN OFF THE PUMP!

THERE IS NO HIGHER EFFICIENCY FOR OPERATING A RECIRCULATION

PUMP THAN WITH

THE PROBLEM WITH HOT WATER DISTRIBUTION

Made in the USA

delivers hot water as consistently

as a pump that operates continuously, but at a

much higher efficiency- without any noticeable

change to the user.

TIMELY HOT WATER

ENERGY SAVINGS

average runtime has been recorded

to be between 30 – 60 minutes per day as opposed

to standard 24/7 pumps that run whether or not

anyone is using hot water.

By activating the pump only when there is user

demand, can save 15 – 30% of

natural gas used by the water heater and 95 –

99% of the pump electricity.

SMART TECHNOLOGY

operates by using sensors. A hot

water demand sensor (flow sensor) instantly

transmits to whenever a user

demands hot water (opens a hot water tap).

Another sensor continuously relays to

. the current temperature of the hot

water that is available in the line.

EXTENDED PUMP LIFE

Because . registers significant

amounts of downtime, the product life cycle

of the system is up to 12 – 15 years.

Typical Pump Runtime

Powered by GRUNDFOS

~1 hour/day

Life Cycle Comparison

Heat Loss Cost Electric Cost Unit Cost

$0 $5K $10K $15K $20K

Typical Pump

24/7

Runtime

WHY USE

“7.1 Efficient Hot Water Distribution (2 points). Design and install an energy-efficient hot water distribution

system. a) Structured Plumbing System: The system must have a demand-controlled circulation loop that is

insulated to at least R-4.”

Multifamily Mid-Rise Buildings Energy And Atmosphere Water Heating (EA 7.1)

USGBC / LEED POINTS:

MINIMIZE PINHOLE LEAKS

sensor controlled technology keeps the turbulent effects

of hot water circulation to a minimum. Doing so reduces wear and tear

on pipes and the occurrence of menacing pinhole leaks.

$140,000

$120,000

$100,000

$80,000

$60,000

$40,000

$20,000

$0$15 $50 $100 $150 $200 $300 $400 $500

Monthly Utility Savings

Res

ult

ing

Incr

ease

in P

roper

ty V

alue

(Bas

ed o

n 5

% m

arke

t ca

p r

ate)

not only offsets the effects

of radiant heat loss in the pipes, but it

minimizes the occurrence of damage to

the pipes.

Reducing the maintenance and repair

costs while lowering utility and energy

charges increases the Net Operating

Income (NOI) and value of your property

dramatically.

THE EQUITY KICKER (NOI)

Save Money and Energy

THE EXTRA BENEFITS...

energy saved isenergy made

HERE’S HOW IT WORKS

The Enovative system has a flow sensor that is installed on the hot water supply that sends a signal every time a tenant opens a hot water faucet.

The Enovative also has a temperature sensor placed on the return line upstream from the pump.

When the temperature sensor reads that the circulation loop is above target temperature, the flow is bypassed and the pump remains off.

When the circulation loop is below target temperature and the flow is triggered the pump turns on delivering fresh hot water to the end user

within seconds.

City Cold Water Supply

Is heated to Approximately 140°F

Hot water is kept in storage until there is a demand for it

Flow sensor is installed on supply line, triggered by user demand

tracks hot water through a heat sensor on the return line, operating only when demand is combined with below target temperature

DESIGN & INSTALLATION

www.EnovativeGroup.com

Detects hot water demand froma single open fixture

Ultra-Sensitive FlowSwitch & Custom Tee

Primes the loop quickly, one time, when hot water is needed

Circ Pump

Adjustable Settings & Diagnostics

Control Boxes

Temperature sensor keeps pump off if there is already hot water

Thermistor

Cut in tee on cold water & screw in flow sensor

Bolt in the new pump

Connect pump & flow switch to control box

Attach thermistor to return line & insulate

EASY INSTALLATION

AC Power Cord

Energy Saved is Energy Made

®Enovative242 Hampton Drive, Venice, CA 90291(866) 495-2734 info@enovativegroup.com

Distributors:

www.EnovativeGroup.com