Docket Number: EER

ResFurnBoilers2013TP

Test Procedure NOPR for Furnaces and Boi
2

Agenda

1:00 – 1:30 pm Welcome, Introductions, and Opening Re

Ashley Armstrong

1:30 – 1:45 pm Regulatory History and Rulemaking Overvi

Ashley Armstrong

1:45 – 2:30 pm Proposed DOE TP Changes Relating to ASH

Victor Franco

2:30 – 2:45 pm Break

2:45 – 3:45 pm Other Proposed TP Changes

Ross Dillon

3:45 – 4:00 pm Closing Remarks

Ashley Armstrong
3

Welcome and Introduction• Introductions• Role of the Facilitator

• Ground Rules

– Listen as an ally

– Focus on issues

– Use short, succinct statements/keep to the point

– Hold sidebar conversations outside the room

– One person speaks at a time (raise hand to be recognized; state y

the record)

– Set cell phones to silent/vibrate

• Housekeeping Items

• Agenda Review

• Opening Remarks

Title Slide, Boiler Photo Source: http://www.easco.com/mobile-temporary-boilers-rentals.html 
4

Public Meeting Agenda

4 Description of Proposed Updates2 Regulatory History3 Rulemaking Overview

1 Introduction

5 Closing Remarks
5

Listening Via the Webcast• The U.S. Department of Energy (DOE) is broadcasting this meet

over the internet.

• DOE is providing the webcast to accommodate interested parti

unable to attend the public meeting in person.

• The web broadcast allows interested parties to listen in, view t

and submit questions and comments.

• All interested parties are encouraged to submit written comme

the public meeting but before the close of the public comment 

May 26, 2015.
6

Purpose of the Public Meeting• Present the procedural and analytical approaches to evaluate t

procedure amendments for furnaces and boilers.

• Invite comments on the test procedure notice of proposed rule

(NOPR)

• Discuss next steps in the rulemaking.

• Encourage participants to submit data, information, summary s

and written comments, including additional issues for discussio
7

Request for Comment

Issue box numbering corresponds to the list of items published at the ethe NOPR document, available at:http://www.regulations.gov/#!documentDetail;D=EERE‐2012‐BT‐TP‐0The deadline for submitting comments is May 26, 2015.

Item: While DOE invites comment on all aspects of the materiapresented in this document, several specific issues on which DOcomment are set out in comment boxes like this one. DOE uses comment boxes to highlight issues and to ask specific questions approaches DOE plans to use or has used to conduct the analysd for this test procedure rulemaking. Such requests for feedbacare numbered sequentially throughout the document.
8

Opening Remarks

Meeting participants are invited to provide opening rem

statements at this time.
9

Public Meeting Agenda

4 Description of Proposed Updates2 Regulatory History3 Rulemaking Overview

1 Introduction

5 Closing Remarks
10

Regulatory History

• Energy Policy and Conservation Act (EPCA) of 1975

(Public Law 94‐163)

─ Established the energy conservation program for consumer products other

than automobiles, which includes furnaces and boilers.

─ Directs DOE to establish test procedures in conjunction with energy

conservation standards.

• Energy Independence and Security Act of 2007

(EISA 2007) (Public Law 110‐140)

─ Directed DOE to incorporate standby mode and off mode for all final rules

prescribing energy conservation standards that are published after July 1,2010. (42 U.S.C. 6295(gg)(3)(A))

─ Directed DOE to develop a test procedure to measure standby mode and

off mode energy consumption of furnaces and boilers no later thanSeptember 30, 2009. (42 U.S.C. 6295(gg)(2)(B)(iii))
11

Regulatory History

• On May 12, 1997, DOE published a final rule establishing most aspects of t

mode test procedure which incorporates by reference the American Socie

Refrigerating, and Air‐conditioning Engineers (ASHRAE) Standard 103‐1993

─ On February 24, 1998, DOE adopted revisions to a provision concerning the ins

collector box. 63 FR 9390.

• On October 20, 2010, DOE published a final rule establishing a method for 

electrical energy use in standby mode and off mode which incorporates by 

International Electro‐technical Commission (IEC) Standard 62301 (First Edi

64621.

─ On December 31, 2012, DOE published another final rule adopting amendmen

incorporation by reference to the latest edition of IEC Standard 62301 (Second 

76831.

• On January 4, 2013, DOE published a request for information (RFI) regardi

revisions to the furnace and boiler test method. 78 FR 675.

─ Key issues included avenues for reducing test burden and the addition of a per

verifying automatic means of adjusting water temperature in hot water boilers

• On July 10, 2013, DOE published a final rule for test procedures for two‐sta

modulating condensing furnaces and boilers. 78 FR 41265.
12

Public Meeting Agenda

4 Description of Proposed Updates2 Regulatory History3 Rulemaking Overview

1 Introduction

5 Closing Remarks
13

• RFI ‐ January 4, 2013• NOPR ‐ March 11, 2015

• NOPR public meeting today – March 26, 2015

• NOPR comment period

– Oral comments from today’s meeting will be recorded and transcri

– Interested parties can submit written comments until 5/26/2015.

– DOE reviews and considers all comments.

• DOE expects to issue a final rule in 12/2015.

Steps in the Rulemaking Process

RFI NOPR Final Rule
14

Public Meeting Agenda

4 Description of Proposed Updates2 Regulatory History3 Rulemaking Overview

1 Introduction

5 Closing Remarks
15

Summary of Proposed Updates1. Updating Industry References to the latest version of ASHRAE 

103‐2007

2. Measurement of Condensate under Steady‐State Conditions

3. Electrical Consumption of Additional Components

4. Smoke Stick Test for Verifying Flow through Heat Exchanger

5. Duct Work for Units that are Installed Without a Return Duct

6. Testing Requirements for Multiposition Configurations

7. Verification Test for Automatic Means for Adjusting the Water 

in Boilers
16

1. Updating Industry References to Latest ASHRAE Standard 10

Introduction

• The Federal test procedure incorporates by reference ASHRAE 103‐19• ASHRAE published ASHRAE Standard 103‐2007 on June/2007.

Overview of Changes

A) Changes to the determination of AFUE for two‐stage and modulating 

– Recalculation of AFUE values for all two‐stage/modulating products

– Reduced testing burden for products with a calculated balance point tem

B) Update to off‐period flue losses calculation for products with post‐pu

C) Update to the determination of burner operating hours (BOH), annua

consumption (EF), and annual electricity consumption (EAE)

– Recalculation of EF and EAE values
17

1. Updating Industry References to Latest ASHRAE Standard 10

A) AFUE Determination for Two‐Stage/Modulating Products:

Introduction

• 2002 NIST study reported issues and proposed changes1

– Issue: Significant discrepancy between the AFUE of some two‐stage/modu

and the AFUE of these same models calculated as a single‐stage unit at red

– Cause: On/off cycle times for two‐stage/modulating models in the ASHRAE 

based on operating at an average of 50% of the rated capacity.

– NIST Proposed Solution: Adding a calculation method for determining the o

for two‐stage and modulating models.

• ASHRAE 103‐2007 adopted the proposed changes from 2002 NIST repo

additional modifications.

Federal Test Procedure

Furnaces Boilers

tON tOFF tON 

Single‐Stage 3.87 13.3 9.68 

Two‐Stage/Modulating 10 10 15 

1 Liu, S. Proposed Revisions of Part of the Test Procedures for

Furnaces and Boilers in ASHRAE 103‐1993. Sept. 2002. NIST.
18

1. Updating Industry References to Latest ASHRAE Standard 10

Topic Current Federal Test Procedure Proposed Feder

Calculation Changes

On/off cycle times (tON/tOFF) Fixed values Calculated values

Calculations at High/Reduced‐fire Requires high and reduced‐fire Reduced‐fire only if T

Design Heating Requirement (DHR) Using QOUT and lookup table Replaced by calculat

Oversize Factor  = (QOUT/DHR) – 1  0.7; R = (1+) (Q

Average Outdoor Temp (TOA,H/TOA,R) Using TC and lookup table Replaced by calculat

Fractional Heating Loads (XH/XR) Using TC and lookup table Replaced by calculat

Testing Changes

Cool Down, Heat Up, Optional

Tracer Gas, and Condensate Cycle

Tests for Two‐Stage Products

Testing at high and reduced‐fire If TC ≤ 5°F* then test

testing at reduced‐fi

tON/tOFF for condensate cycle test Testing at fixed values Testing at calculated 

A) AFUE Determination for Two‐Stage/Modulating Products:

Summary of Proposed Changes

* This occurs when the reduced output capacity to maximum input capacity ratio is

equal to approximately 0.59 or above (which is the case for most two‐stage

furnaces/boilers)
19

1. Updating Industry References to Latest ASHRAE Standard 10

A) AFUE Determination for Two‐Stage/Modulating Products:

On/Off Cycle Times (tON(H,R) /tOFF(H,R)) Proposed Equations

Where:

N50 = thermostat cycle response at 50% load (5 for furnaces and 2 for boile

60 = min/hr conversion,

4 = derived constant for parabolic equation that represents thermostat resp

ܨܮሺு,ோሻ = high and reduced fire load factors: ܨܮோ ൌ ଺ହି்ೀಲ,ೃ ∆்೏ሺଵା∝ೃሻ; ܨܮு ൌ ଺ହି்ೀ

଺଴ሺଵା

TOA,(H,R) = high and reduced fire average outdoor temperature,

ΔTd = 60 (same as 65‐5) when TC ≤ 50F and 65‐ TC when TC > 50F,

αR = oversize factor at reduced load: ∝ோൌ 1 ൅∝ ொೀ౑౐,ೃ ொೀ౑౐ , and

α = oversize factor at maximum load (=0.7).

• Equations are from sections 11.4.9.11 and 11.4.9.12 of ASHRAE 103‐200

• On/off cycle times impact sensible and infiltration heat loss factors (LS,ON

LS,OFF) in AFUE calculation

ࡺࡻ࢚ሺࡴ,ࡾሻ ൌ ଺଴ ସேఱబሺଵି௅ிሺಹ,ೃሻሻ, ࡲࡲࡻ࢚ሺࡴ,ࡾሻ ൌ ݐைேሺு,ோሻ ଵ ௅ிሺಹ,ೃሻ 
20

1. Updating Industry References to Latest ASHRAE Standard 10

A) AFUE Determination for Two‐Stage/Modulating Products:

Proposed Changes to On/Off Cycle Times for Condensate Cyclic 

• Condensate cyclic test described in section 9.8 of ASHRAE 103‐2007.

• Proposed Change: Calculate on/off cycle times for two‐stage/modula

furnaces/boilers before performing the condensate cycle test.

• Testing Change: Condensate cyclic test requires the calculation of tON

which is determined after conducting the high and low fire steady sta

to calculate QOUT and QOUT,R.

− Exception: the ratio QIN,R/QIN may be substituted for QOUT,R/QOUT in equati

(ASHRAE 103‐2007, section 11.4.8.2) and TC (ASHRAE 103‐2007, section 1

error between the two ratios is not more than 2%.

Furnaces Boiler

tON tOFF tON 

Current Federal TestProcedure 10 10 15 Proposed Federal Test

Procedure

Equations from sections 11.4.9.11 (tON)and 11.4.9.1

ASHRAE 103‐2007.
21

1. Updating Industry References to Latest ASHRAE Standard 10

A) AFUE Determination for Two‐Stage/Modulating Products:

Reduced Test Burden for Two‐Stage Products

• For two‐stage furnaces/boilers testing with a Balance Point Tempera

only the reduced‐fire test is required for the following test:

– Cool Down (ASHRAE 2007, sections 9.5.1.1.2 and 9.5.2.5)

– Heat Up (ASHRAE 2007, sections 9.6.1.2 and 9.6.2.2)

– Optional Tracer Gas (ASHRAE 2007, section 9.7.5)

– Condensate Cycle (ASHRAE 2007, section 9.8)

• This reduces burden for two‐stage equipment since high‐fire test is r

ASHRAE 103‐1993 version

• TC ≤ 5°F when the reduced output capacity to maximum input capac

to approximately 0.59 or greater, which is the case for most two‐stag

boiler models:

࡯ࢀ ൌ 65 െ 60 1 ൅∝ ܳை୙୘,ோ ܳை୙୘
22

1. Updating Industry References to Latest ASHRAE Standard 10

Product Type Model (Test) Non‐Condensing/ Condensing Control Type Ratio (QOUT,R/QOUT

Non‐Weatherized Gas

Furnace

Mfr A, Model 1 Non‐condensing Two‐Stage 66% 

Mfr B, Model 1 Non‐condensing Two‐Stage 65% Mfr B, Model 2 Condensing Two‐Stage 65% Mfr C, Model 1 Condensing Two‐Stage 65% Mfr D, Model 1 Condensing Modulating 49% 

Weatherized Gas Furnace

Mfr A, Model 2 Non‐condensing Two‐Stage 74% Mfr E, Model 1 Non‐condensing Two‐Stage 81% 

Mobile Home Gas Furnace Mfr E, Model 2 Condensing Two‐Stage 65% 

NW Oil Furnace Mfr G, Model 1 Non‐condensing Two‐Stage 82% 

Hot Water Gas Boiler

Mfr H, Model 2 Non‐condensing Two‐Stage 48% Mfr I, Model 3 Non‐condensing Modulating 64% Mfr J, Model 2 Condensing Modulating 20% Mfr J, Model 3 Condensing Modulating 20% 

Mfr K, Model 2 Condensing Modulating 20% 

A) AFUE Determination for Two‐Stage/Modulating Products:

Specifications of Tested Models

• DOE tested 14 different two‐stage and modulating furnaces/boilers t

impact of changes in proposed Federal test procedure from the prev
23

1. Updating Industry References to Latest ASHRAE Standard 10

* DOE used the reduced‐fire data of each tested model to calculate the AFUE as if the model was a single‐stage u

equal to the reduced fire input rate. The AFUE value in this case is the same for the current and the proposed Fed

** The same furnace model tested under different ambient conditions.

Model (Test)

Two‐Stage/Modulating AFUE Rating Single‐Stage

at Reduced Fire

AFUE Rating*

Be

and 

Current Federal

Test Procedure

Proposed Federal

Test Procedure

Non‐Weatherized Gas Furnace

Mfr A, Model 1, average 80.71% 81.10% 81.31% 

Test 1** 80.47% 80.75% 80.89% Test 2** 80.74% 81.21% 81.46% Test 3** 80.69% 81.08% 81.31% Test 4** 80.93% 81.35% 81.56% 

Mfr B, Model 1 78.02% 78.33% 78.57% 

Weatherized Gas Furnace

Mfr A, Model 2 78.78% 79.97% 80.24% Mfr E, Model 1 82.81% 83.23% 83.33% 

Non‐Weatherized Oil Furnace

Mfr G, Model 1 84.33% 85.19% 85.38% 

Hot Water Gas Boiler

Mfr H, Model 2 81.84% 81.96% 82.49% Mfr I, Model 3 84.22% 84.08% 83.79% 

A) AFUE Determination for Two‐Stage/Modulating Products:

Test Results: Non‐condensing Two‐stage/Modulating Products
24

1. Updating Industry References to Latest ASHRAE Standard 10

* DOE used the reduced‐fire data of each tested model to calculate the AFUE as if the model was a single‐stag

capacity equal to the reduced fire input rate. The AFUE value in this case is the same for the current and the p

procedures.

Model (Test)

Two‐Stage/Modulating AFUE Rating Single‐Stage

at Reduced Fire

AFUE Rating*

B

a

Current Federal Test

Procedure

Proposed Federal

Test Procedure

Non‐Weatherized Gas Furnace

Mfr B, Model 2 95.05% 94.97% 94.92% 

Mfr C, Model 1 92.07% 91.12% 90.73% 

Mfr D, Model 1 94.97% 94.74% 94.68% 

Mobile Home Gas Furnace

Mfr E, Model 2 94.76% 93.26% 93.04% 

Hot Water Gas Boiler

Mfr J, Model 2 89.49% 89.72% 89.78% Mfr J, Model 3 90.74% 90.24% 89.69% 

Mfr K, Model 2 89.31% 89.42% 90.10% 

A) AFUE Determination for Two‐Stage/Modulating Products:

Test Results: Condensing Two‐stage/Modulating Products
25

1. Updating Industry References to Latest ASHRAE Standard 10

B) Changes to Off‐cycle Losses for Products with Long Post Purge T

Introduction

• 2002 NIST study1

– Issue: For some units (primarily oil‐fired boilers) that require a post purge 

than 3 minutes, the existing test procedure produces a smaller flue loss r

– Cause: Existing Federal test procedure limits tp to 3 minutes in the flue los

• ASHRAE 103‐2007 proposed changes based on NIST derived flue loss 

Current Test Procedure Proposed Test Procedure

Testing Limits tp to 3 minutes tp is allowed to be greater than 3 minut

minutes, measure flue gas temperature 

of the post‐purge period (ASHRAE 103‐

9.5.2.1)

Calculations Limits tp to 3 minutes Off‐cycle sensible and infiltration heat 

post‐purge period (LS,OFF1 and LI,OFF1) are 

separately for units with tp > 3 minutes 

2007 section 11.2.10.6 and 11.2.10.8)

1 Liu, S. Proposed Revisions of Part of the Test Procedures for Furnaces

and Boilers in ASHRAE 103‐1993. Sept. 2002. NIST.
26

1. Updating Industry References to Latest ASHRAE Standard 10

C) BOH, EF, and EAE Changes:

Introduction

• 2002 NIST study reported issues and proposed changes1

– Issue: 2‐stage/modulating BOH based on maximum input and m

factor R (accounts for useful heat output of electrical componen

– Cause: Ignores variability of electrical component input for a mu

variable speed circulating/combustion blower.

– NIST Proposed Solution: Calculate the burner operating hours a

mode.

• ASHRAE 103‐2007 adopted the proposed changes from 2002 

• DOE proposes to adopt ASHRAE 103‐2007 changes (with mod

account for electronic ignition and standby and off mode elec

1 Liu, S. Proposed Revisions of Part of the Test Procedures for Furnaces and Boilers

in ASHRAE 103‐1993. Sept. 2002. NIST.

2 R factor accounts for greater load factors per cycle: 0.50, for 2‐stage/modulating

unit (R = 0.225 for single‐stage unit).
27

1. Updating Industry References to Latest ASHRAE Standard 10

Topic Current Test Procedure Proposed 

Burner Operating Hours(BOH)

Calculated at high‐fire only. Calculated se

operating mo

Heat from ElectricityCorrection Factor R for two‐

stage/modulating products

(R)

Correction factor (R) is used incalculating BOH to compensate

for longer use of electrical

components.

Correction fa

(heat from el

determined s

each operatin

Fuel Consumption (EF) Calculated at the high‐fire only. Calculated at 

low‐fire.

Electricity Consumption (EAE) Same on‐time ratios for high

fire and low fire.

Separate on‐thigh and low 

On‐time ratios (y, yP, yIG) Based on fixed on‐time cycle

time (tON) at high fire.

Based on calccycle times (t

operating mo

Design Heating Requirement

(DHR)

Determined using QOUT and

lookup table.

Replaced by c

QOUT/(1 + ).

Fractional Heating Loads

(XH/XR)

Determined using TC andlookup table.

Replaced by cdependent on 

C) BOH, EF, and EAE Changes: Summary
28

1. Updating Industry References to Latest ASHRAE Standard 10

Item 1: DOE requests comment on the proposed changes to the DOE tes

resulting from incorporating the 2007 version of ASHRAE 103 with some

modifications.
29

2. Measurement of Condensate under Steady‐State Conditions

Introduction

• The current test procedure requires the establishment of steady‐state 

during a minimum period of 30 minutes, before measurement of con

• The measurement of condensate requires an additional 30 minute pe

the establishment of steady state conditions.

Impact

• Reduces test burden by shortening overall test duration.

Current Test Procedure Proposed Test Procedure

2 x 30 minutes: establishment of

steady‐state conditions, followed bymeasurement of condensate.

1 x 30 minutes: DOE proposes 

allow the measurement ofcondensate during establishm

steady‐state conditions.
30

2. Measurement of Condensate under Steady‐State Conditions

Item 2: DOE requests comment on the proposal to allow for the measurecondensate during the establishment of the steady‐state conditions.

Test Results
31

Introduction

• Current test procedure does not capture all electrical consumption in e

measurements and calculations

3. Electrical Consumption of Additional Components

Current Test Procedure Proposed Test Procedure

Account for blower/circulation pump (BE),

inducer blower (PE), ignition (PEIG), and

standby mode and off mode (ESO) power.

Additionally capture second

pump (if present), gas valve

controls power.
32

Example Calculation

• Proposed EAE calculation for single‐stage furnaces and boilers:

Where:

 BOHSS = national average number of burner operating hours for boilers equipped with s

 yP = ratio of induced or forced draft blower on‐time to average burner on‐time

 PE = burner electrical power input at full‐load steady‐state operation, including electric

energized

 yIG = ratio of burner interrupted ignition device on‐time to average burner on‐time

 PEIG = electrical input rate to the interrupted ignition device on burner (if employed)

 y = ratio of blower or pump on‐time to average burner on‐time

 BE = circulating air fan or water pump electrical energy input rate at full‐load steady‐sta

 ys = ratio of secondary boiler pump on‐time to average burner on‐time

 BES = secondary boiler pump electrical energy input rate at full‐load steady‐state opera

 yO = ratio of gas valve and controls combined on‐time to average burner on‐time, assum

 EO = gas valve and controls combined electrical energy input rate at full‐load steady‐sta

present

 ESO = annual electrical standby mode and off mode energy consumption

3. Electrical Consumption of Additional Components

ௌ

ܧ൅ைሻܧைݕ ൅ ௌܧܤௌݕ ൅ ܧܤݕ ൅ ீூܧீܲூݕ ൅ ܧܲ௉ݕௌௌሺܪܱܤ ൌ ܧܣܧ
33

Test Results

• Results from testing of one furnace model.

3. Electrical Consumption of Additional Components

Item 3: DOE requests comment on proposed changes to include the measurement 

component electrical power for calculating the annual auxiliary electrical use.

7% / 11% of Total Power
34

4. Smoke Stick Test for Verifying Flow through Heat Exchanger

Current Test Procedure Provisions• Measures off‐cycle flue gas draft factor (DF) using tracer gas test (may p

unreliable results for DF < 0.1)

• Allows for default draft factors (DF) instead of testing:

– Units with power burners: DF = 0.4

– Units with atmospheric burners: DF = 1.0

• If absolutely no airflow: DF = 0.05

Current Test Procedure Proposed Test ProcedureConcerns regarding reliability of

current procedure.

• Smoke stick test to verify the absence o

the heat exchanger. Following smoke s

• No visual disturbance  DF = 0.05

• Confirmation of visual disturbance  

gas test or default value when establis

• Removing term “absolutely” in referenc

through the heat exchanger.
35

5. Duct Work for Units That Are Installed Without a Return Du

Introduction• For units that have been designed to be installed without a return duct

setup requirements are not sufficiently specific.

Item 4: DOE requests comments on the proposal to add a provision in the 

procedure clarifying that the return (inlet) duct is not required during test

intended to be installed without a return duct, according to the manufact

manual.

Current Test Procedure Proposed Test ProcedureSpecifies use of return duct for all

furnaces (IBR section 7.2.1 of AHSRAE

103‐1993, Figures 1 and 2).

Return (inlet) duct not requir

testing of units intended to b

without a return duct.
36

6. Testing Requirements for Multiposition Configurations

Introduction• Furnaces may be designed such that they can be installed in multiple co

• For furnaces that are designed to be installed in multiple configurations

setup requirements are not sufficiently specific.

Item 5: DOE requests comment on its proposal to allow testing of units comultiple position installations to use the blower access door as an option i

of the inlet openings.

Current Test Procedure Proposed Test Procedure

Does not specify testing

requirements for multipositionfurnaces.

• Require that multiposition fu

tested using, at a minimum, t

efficient position.

• For multiposition furnaces no

with an open inlet, allow test

only the blower access door.
37

7. Verification Test for Automatic Means for Adjusting the Wate

Temperature in Boilers

Introduction• In 2008, DOE published a technical amendment to add design requirem

water boilers consistent with the provisions of EISA 2007.

• Proposed test method (to be specified in 10 CFR 429.134) would be us

assessment and enforcement testing.

Impact• Allows for verification of the boiler automatic means functionality.

• Manufacturers do not have to conduct this testing, but this is how DOE 

determine if a given Basic Model complies with the applicable design r

Current Test Procedure Proposed Test Procedure

None. Separate verification methods for hot w

boilers with single‐stage and two‐

stage/modulating controls.
38

7. Verification Test for Automatic Means for Adjusting the Wate

Temperature in Boilers

Single Stage Boilers Two Stage/Modulating Boil

Requirement Burner fires only when residual heat

of the system water cannot meet

inferred heating load.

Automatically adjust supply wat

response to changes in inferred 

Method Thermal pre‐purge

• Burner activation delayed until

residual heat of the boiler water

cannot meet the heating load.

 No fuel input when residual heat

can satisfy load

Outdoor reset

• Boiler controls adjusts supply 

temperature in response to c

air temperature (OAT).

 Lower fuel input at higher OA

Inferred load

• Boiler controls use outdoor a

temperature, thermostat dem

cycling patterns to infer heati

supply water temperature.

 Lower fuel input at lower inf
39

Single‐stage test results

7. Verification Test for Automatic Means for Adjusting the Wate

Temperature in Boilers

Terminate call

for heat

Warmup and

stabilization

Reinitiate call

for heat

Allowed delay

up to 3 mins
40

Two stage/modulating test results

7. Verification Test for Automatic Means for Adjusting the Wate

Temperature in Boilers

Establish simulated

high inferred load

conditions

Establish simulated

low inferred load

conditions

Temperature

stabilization

T

s
41

Public Meeting Agenda

4 Description of Proposed Updates2 Regulatory History3 Rulemaking Overview

1 Introduction

5 Closing Remarks
42

Closing Remarks

Meeting participants are invited to provide closing rema

this time.
43

How to Submit Comments• In all correspondence, please refer to the furnace and bo

procedure rulemaking by:

– Test Procedure for Furnaces and Boilers

– Docket Number: EERE‐2012‐BT‐TP‐0024

– Regulatory Identification Number (RIN): 1904‐AC79

• Email: ResFurnBoilers2013TP0008@ee.doe.gov

Postal Mail:

Ms. Brenda Edwards

U.S. Department of EnergyBuilding Technologies Office

Mailstop EE‐5B

1000 Independence Avenue, S.W.

Washington, DC 20585‐0121

Courier:

Ms. Brenda EdwardsU.S. Department of EBuilding Technologie

L’Enfant Plaza, S.W., 

Washington, DC 200

Telephone: (202) 586

• Comment period closes May 26, 2015 at 11:59 PM EDT