PNM Wi-Fi Web-Programmable Thermostat PDF Free Download

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PNMMAN1902PNM IT801 User ManualJob Opened: February 1, 2019Requested In-Home Date: FebruaryLatest Revision: April 5, 2019Approved:PNM Wi-Fi Web-ProgrammableThermostatUser’s ManualInstalled by:Date:Number of Thermostats:Notes:PNMMAN1902LETTER8.5” X 11”PNMMAN1902–PNM IT801 User ManualPiece: ManualQuantity: XXXXXSize: 8.5 x 11”Colors: 4/4Finishing: Fold, TrimMail: N/ACREATIVEDIRECTORPROOFREADER Program Specific ChecklistCOPYSUPERVISORCOPYWRITERPhone NumberURLProgram AGER

PNMMAN1902PNM IT801 User ManualJob Opened: February 1, 2019Requested In-Home Date: FebruaryLatest Revision: April 5, 2019Approved:Table of ContentsStep 1: Getting Familiar with Your Thermostat.3-5A. Thermostat Buttons and Indicators .3B. Thermostat Display .4Step 2: Programming .6-11A. Suggested Thermostat Settings .6B. Thermostat Stages .6C. Using Your Thermostat Control App .7i. Get Started .7ii. Using Your Thermostat Controls.7iii. Set A Vacation or Away Hold .8D. Programming Your Thermostat Manually .9Step 3: Menus .12-20A. Wi-Fi Settings Menu .12B. Filter Timer Settings Menu .16C. Reset Filter Timer .17D. LCD Backlight Settings Menu .18E. Nightlight Settings Menu .18F. Keypress Beep Conﬁrmation Menu .19G. Time-of-Day (TOD) Recovery .20Step 4: How to Set a Temperature Hold .21-22A. Temporary Hold .21B. Timed Temporary Hold .21C. Permanent Hold .22D. Ending a Hold .22Step 5: Using the Keypad Lock .23-25A. Partial (PART) Lockout .23B. Full (FULL) Lockout .24C. Unlocking the Keypad .25Step 6: PNM Power Saver Activation Periods .26-27A. Activation (Disabled) Phase Displays .26B. Cooling (Enabled) Phase Displays .26Troubleshooting .27-29Your PNM Power Saver thermostat controls your central air conditioning and heating system. The types of compatible systemsinclude:Central Air Conditioners: Single Stage Multi-StageHeat Pump*: Single Stage Multi-StageFurnaces: Single Stage Gas or Oil Multi-Stage Gas or Oil Single Stage Electric Multi-Stage Electric Two-Wire Hydronic Millivolt Heat SystemAux Heat: Single Stage Electric Multi-Stage ElectricAll compatible components are connected and conﬁgured by the PNM Power Saver technician during installation.*CAUTION: If you have a heat pump, make sure your heat settings are no more than 2 between the warmest temperature —the one you set when you are present — and coolest temperature — the one you set when you are away. Large temperaturedifferences may activate the auxillary heating mode and potentially cause your electric bill to increase signiﬁcantly in the falland winter months.2PNM Wi-Fi Web-Programmable Thermostat User’s ManualLETTER8.5” X 11”PNMMAN1902–PNM IT801 User ManualPiece: ManualQuantity: XXXXXSize: 8.5 x 11”Colors: 4/4Finishing: Fold, TrimMail: N/ACREATIVEDIRECTORPROOFREADER Program Specific ChecklistCOPYSUPERVISORCOPYWRITERPhone NumberURLProgram AGER

PNMMAN1902PNM IT801 User ManualJob Opened: February 1, 2019Requested In-Home Date: FebruaryLatest Revision: April 5, 2019Approved:Step 1: Getting Familiar with Your ThermostatA. Thermostat Buttons and Indicators71654321NightlightEnables or disables illumination. Provides night light function. Can be used to activatethe LCD back light.2FAN ButtonChanges fan setting (Auto, On)3SYSTEM ButtonChanges operating mode (Cool, Heat, Aux Heat [displayed on heat pump units only]and Off)4User Program ButtonsFacilitates various operations in different menus5Temperature Setpoint ButtonsChanges temperature up6LEDsIndicates status of activation periods. If illuminated green, the system is in anactivation period.7Module SlotHouses the communications radio moduleor downPNM Wi-Fi Web-Programmable Thermostat User’s Manual3LETTER8.5” X 11”PNMMAN1902–PNM IT801 User ManualPiece: ManualQuantity: XXXXXSize: 8.5 x 11”Colors: 4/4Finishing: Fold, TrimMail: N/ACREATIVEDIRECTORPROOFREADER Program Specific ChecklistCOPYSUPERVISORCOPYWRITERPhone NumberURLProgram AGER

PNMMAN1902PNM IT801 User ManualJob Opened: February 1, 2019Requested In-Home Date: FebruaryLatest Revision: April 5, 2019Approved:Step 1: Getting Familiar with Your ThermostatB. Thermostat Display¿¿¿¿¿¿¿¿¿¿¿¿¿¿¿¿1Set rmMenuDoneSaAMPMSuMoTu WeThFrHOLD4Stage12 3 45OFC6OffCoolAux HeatMorningAutoEveningOnDayNightEnergyUn Occupied1Messaging DisplayDisplays current date, HVAC system status, activation period status, PNM-related messagesand any Wi-Fi communication errors.* In the event of a power outage, the clock will maintainthe correct time for 24 hours.2Lock IconConﬁrms keypad lockout, preventing unwanted changes to thermostat settings3HOLD IndicatorAppears only when thermostat program is overridden4Time and Day DisplayIndicates current time and day of the week5HEAT or COOL Stage DisplayWhen ON, the indicated stage is active; when OFF, the stage is inactive; when ﬂashing,compressor delay is active. See page 9 for more about stages.6Fan StatusAppears only when fan is on*Should a Wi-Fi communications error (COMM ERROR, XMPP ERROR, SSL ERROR) display in the thermostat messaging area, pleasecall PNM Power Saver at 1-866-471-7906 immediately. This message indicates a communication problem between your thermostat,PNM Power Saver and the PNM Power Saver Self-Service app.4PNM Wi-Fi Web-Programmable Thermostat User’s ManualLETTER8.5” X 11”PNMMAN1902–PNM IT801 User ManualPiece: ManualQuantity: XXXXXSize: 8.5 x 11”Colors: 4/4Finishing: Fold, TrimMail: N/ACREATIVEDIRECTORPROOFREADER Program Specific ChecklistCOPYSUPERVISORCOPYWRITERPhone NumberURLProgram AGER

PNMMAN1902PNM IT801 User ManualJob Opened: February 1, 2019Requested In-Home Date: FebruaryLatest Revision: April 5, 2019Approved:Step 2: ProgrammingA. Suggested Thermostat SettingsYour new thermostat makes it easy for you to save on heating and cooling costs by regulating your home’s temperature based onthe activities of the household. The key is to establish a program that reduces heating and cooling in your home when you don'tneed as much. Talk with other household members to determine their comfort level and set your thermostat according toeveryone’s schedule.Here is a sample schedule from ENERGY STAR :TimeSetpoint Temperature(Heat)Setpoint Temperature(Cool)Wake6:00 a.m. 70 F 75 FDay8:00 a.m.Setback at least 8 FSetup at least 5 FEvening6:00 p.m. 70 F 75 FSleep10:00 p.m.Setback at least 8 FSetup at least 4 FSettingAttention Heat Pump Users: big changes in temperature settings can cause your heat pump to operate in auxiliary mode, a moreenergy-intensive heat recovery process. This can increase your winter energy bills. If you use temperature setbacks for your heatingsystem, only set back the temperature by 2 degrees or less to avoid higher energy costs.SettingTimeSetpoint Temperature(Heat)Setpoint Temperature(Cool)Morning6:00 a.m.7075Day8:00 a.m.6880Evening6:00 p.m.7075Night10:00 p.m.6880B. Thermostat StagesThe Wi-Fi web-programmable thermostat displays up to four stages of heat or cooling.If you have a heat pump, there could be as many as four stages of heat. The ﬁrst stage is the compressor operating and Stage 1 willappear on the thermostat screen. There may be up to three other stages – 2, 3, 4 – depending on how much additional heat isneeded to meet the temperature setpoint. If you see Stage 2, 3, or 4 in addition to Stage 1 on the thermostat home screen, your heatpump is using a more energy-intensive auxiliary or secondary heating source to meet the temperature setpoint.If you have a gas furnace, there could be two stages of heat. These stages are low and high ﬁre. If additional heat is needed to reachthe temperature setpoint, Stage 2 will display in addition to Stage 1 on the thermostat home screen.Some air conditioning units have more than one stage of cooling. This could be a low and high speed on a variable speed compressor,or a ﬁrst and second compressor if there are multiple compressors. If additional cooling is needed to reach the temperature setpoint,Stage 2 will display in addition to Stage 1 on the thermostat home screen.6PNM Wi-Fi Web-Programmable Thermostat User’s ManualLETTER8.5” X 11”PNMMAN1902–PNM IT801 User ManualPiece: ManualQuantity: XXXXXSize: 8.5 x 11”Colors: 4/4Finishing: Fold, TrimMail: N/ACREATIVEDIRECTORPROOFREADER Program Specific ChecklistCOPYSUPERVISORCOPYWRITERPhone NumberURLProgram AGER

PNMMAN1902PNM IT801 User ManualJob Opened: February 1, 2019Requested In-Home Date: FebruaryLatest Revision: April 5, 2019Approved:Step 2: ProgrammingC. Using Your Thermostat Control AppDownload the PNM Self-Service app to your smartphone or tablet for access to thermostat controls anytime, anywhere. TheThermostat Control allows you to adjust your thermostat’s temperature, set Away and Vacation holds, and turn your system on andoff. You can also receive notices about so you know when an activation period is underway and how much longer it will last.i. Get Started1. Log on to the PNM Self-Service app using your PNMMy Account* Username and Password.*If you are not a PNM My Account user, go to www.pnm.comand search for My Account to register and create aUsername and Password.2. Click on the link to My Thermostat in the PNMSelf-Service app.ii. Using Your Thermostat Controls1. Click Heat, Cool or Off to change the systems operation.2. Set your thermostat temperature setpoint in the selected mode using the dial. Swipe around the circle to increase ordecrease temperature.PNM Wi-Fi Web-Programmable Thermostat User’s Manual7LETTER8.5” X 11”PNMMAN1902–PNM IT801 User ManualPiece: ManualQuantity: XXXXXSize: 8.5 x 11”Colors: 4/4Finishing: Fold, TrimMail: N/ACREATIVEDIRECTORPROOFREADER Program Specific ChecklistCOPYSUPERVISORCOPYWRITERPhone NumberURLProgram AGER

PNMMAN1902PNM IT801 User ManualJob Opened: February 1, 2019Requested In-Home Date: FebruaryLatest Revision: April 5, 2019Approved:Step 2: ProgrammingC. Using Your Thermostat Control App (continued)UserchoosesUserchoosesUser choosestt t3. Program your thermostat’s timed setpoints to the desired time and temperature.Edit Cool SetpointMy ThermostatTemperatureMy ThermostatScheduleTemperature78 CustomCustomHeat ScheduleSMTCool ScheduleWTFWeekend24472 Apply2466:00 AM72 888:30 AM78 78 1012 pm12 pm2241012 pm244:15 PM44:15 PM4:15 PM72 672 68689:00 PM1089:00 PM1075 12 am1075 12 amCopy to Other ThermostatsClicking a setpointbrings up a modalpopup.Weekend12 am66:00 AM1075 WeekdayCancel8:30 AM9:00 PMCool ScheduleDay before 60 2872 10:00 AM12 am8:30 AM78 Start TimeHeat ScheduleApplyDay before 60 672 82 Custom8:30 AMWeekdayCancelScheduleStart TimeCool Schedule12 amDay before 73 6:00 AMMy ThermostatScheduleHeat ScheduleSThere are 3 programoptions in your settingsmenu located in thedropdown.ESetpointEdit Cool12 amScheduler displays modiﬁed setpoint.Copy to Other ThermostatsCopy to Other ThermostatsAdjust temperature andstart time of setpoint.Click Apply and thesettings shown in themodal are applied to theschedule.iii. Set A Vacation or Away Hold1. Click Vacation to set a temperaturehold for a speciﬁed number of days.The temperature and schedule willrevert to the programmed settingafter the speciﬁed number of dayshas concluded. This setting is similarto the Timed Temporary Hold asdescribed on page 21.2. Click Away to set a temperature holdfor an undetermined period of time.The temperature will hold until youexplicitly remove it. This is similar tothe Permanent Hold as describedon page 22.8PNM Wi-Fi Web-Programmable Thermostat User’s ManualLETTER8.5” X 11”PNMMAN1902–PNM IT801 User ManualPiece: ManualQuantity: XXXXXSize: 8.5 x 11”Colors: 4/4Finishing: Fold, TrimMail: N/ACREATIVEDIRECTORPROOFREADER Program Specific ChecklistCOPYSUPERVISORCOPYWRITERPhone NumberURLProgram AGER

PNMMAN1902PNM IT801 User ManualJob Opened: February 1, 2019Requested In-Home Date: FebruaryLatest Revision: April 5, 2019Approved:Step 2: ProgrammingD. Programming Your Thermostat ManuallyAlthough the process below explains how to program your thermostat manually when you are home, using the PNM SelfService app from your mobile device is much easier and quicker. See page 7 for more information.Your Wi-Fi web-programmable thermostat’s remote capabilities enable you to make instant energy-management decisionson the go. This is why programming your thermostat through the PNMSelf-Service app is recommended over the manualprogramming described below.The main thermostat screen displays the date, time, current temperature setpoint and the temperature in the room. It isalso the starting point for programming the thermostat settings and schedule.To set a programmed schedule:1. Press the Menu button.2. Press the Sched button. This button appears on the leftmenu.3. Press the System button to select Heat or Cool, depending onwhich system you want to set a schedule.4. The time for the Morning setting will ﬂash. Use theandbuttons to increase or decreasethe Morning time setting. When ﬁnished press theNext button.PNM Wi-Fi Web-Programmable Thermostat User’s Manual9LETTER8.5” X 11”PNMMAN1902–PNM IT801 User ManualPiece: ManualQuantity: XXXXXSize: 8.5 x 11”Colors: 4/4Finishing: Fold, TrimMail: N/ACREATIVEDIRECTORPROOFREADER Program Specific ChecklistCOPYSUPERVISORCOPYWRITERPhone NumberURLProgram AGER

PNMMAN1902PNM IT801 User ManualJob Opened: February 1, 2019Requested In-Home Date: FebruaryLatest Revision: April 5, 2019Approved:Step 2: ProgrammingD. Programming Your Thermostat Manually (continued)5. The setpoint temperature will ﬂash. Use theandbuttons to increase or decrease the temperature tothe desired Morning temperature setting. When ﬁnishedpress the Next button.6. The time for the Day setting will ﬂash. Use theandbuttons to increase or decrease the Day timesetting. When ﬁnished press the Next button.7. The setpoint temperature will ﬂash. Use theandbuttons to increase or decrease the temperature to thedesired Day temperature setting. When ﬁnished press the Next button.10PNM Wi-Fi Web-Programmable Thermostat User’s ManualLETTER8.5” X 11”PNMMAN1902–PNM IT801 User ManualPiece: ManualQuantity: XXXXXSize: 8.5 x 11”Colors: 4/4Finishing: Fold, TrimMail: N/ACREATIVEDIRECTORPROOFREADER Program Specific ChecklistCOPYSUPERVISORCOPYWRITERPhone NumberURLProgram AGER

PNMMAN1902PNM IT801 User ManualJob Opened: February 1, 2019Requested In-Home Date: FebruaryLatest Revision: April 5, 2019Approved:Step 2: ProgrammingD. Programming Your Thermostat Manually (continued)8. The time for the Evening setting will ﬂash. Use thebuttons to increase or decreaseandthe Evening time setting. When ﬁnished press theNext button.9. The setpoint temperature will ﬂash. Use theandbuttons to increase or decrease the temperature to thedesired Evening temperature setting. When ﬁnished press the Next button.10. The time for the Night setting will ﬂash. Use theandbuttons to increase or decreasethe Night time setting. When ﬁnished press theNext button.11. The setpoint temperature will ﬂash. Use theandbuttons to increase or decrease the temperature to thedesired Night temperature setting. When ﬁnished press the Next button to continue to the next day and repeat theprocess for the remaining day.12. When ﬁnished press the Done button.PNM Wi-Fi Web-Programmable Thermostat User’s Manual11LETTER8.5” X 11”PNMMAN1902–PNM IT801 User ManualPiece: ManualQuantity: XXXXXSize: 8.5 x 11”Colors: 4/4Finishing: Fold, TrimMail: N/ACREATIVEDIRECTORPROOFREADER Program Specific ChecklistCOPYSUPERVISORCOPYWRITERPhone NumberURLProgram AGER

PNMMAN1902PNM IT801 User ManualJob Opened: February 1, 2019Requested In-Home Date: FebruaryLatest Revision: April 5, 2019Approved:Step 3: MenusA. Wi-Fi Settings MenuThis menu displays the name of the wireless Internet access network to which the thermostat is connected. In this menu,you may reset your wireless Internet connection [RESET Wi-Fi] or remain connected to the existing network [CLIENT]. Thedefault setting is CLIENT.1: Return Thermostat to Wi-Fi Conﬁguration ModeSometimes it might be necessary to move the wireless Internet accessible thermostat to a different wireless Internetaccess network, change your network name or change your network password. To do this, you will need to disconnect yourPNM Power Saver thermostat from your wireless Internet network as follows:1. On the Main Menu screen,press the Menu button.2. Press the Other button. Thethermostat will display the WiFi SETTINGS menu.3. Press the Select button. Themessage area of the thermostatwill display the wirelessInternet access network name(SSID) to which you arecurrently connected.4. Press the Next button. The topline of the message area willﬂash CLIENT.5. Press thebutton toadvance the display toRESET Wi-Fi.6. As RESET Wi-Fi is ﬂashing,press the Select button.12PNM Wi-Fi Web-Programmable Thermostat User’s ManualLETTER8.5” X 11”PNMMAN1902–PNM IT801 User ManualPiece: ManualQuantity: XXXXXSize: 8.5 x 11”Colors: 4/4Finishing: Fold, TrimMail: N/ACREATIVEDIRECTORPROOFREADER Program Specific ChecklistCOPYSUPERVISORCOPYWRITERPhone NumberURLProgram AGER

PNMMAN1902PNM IT801 User ManualJob Opened: February 1, 2019Requested In-Home Date: FebruaryLatest Revision: April 5, 2019Approved:Step 3: MenusA. Wi-Fi Settings Menu (continued)2: Connect to a Wireless Internet NetworkIn the conﬁguration mode, the PNM Power Saver thermostat acts like a wireless Internet access point. This allows the user touse any wireless Internet-enabled device to connect to the thermostat and conﬁgure it to use their Wi-Fi settings with astandard Web browser.It is necessary to reconnect to the wireless Internet access point if you see any of the follow communication error messagesat the top of your thermostat display: COMM ERROR, XMPP ERROR, SSL ERROR.NOTE: If any settings on your wireless Internet router are changed at any time during this step, you must turn off power toyour furnace or air conditioner and restart this procedure.1. On the thermostat Main Menuscreen, press the Menu button.2. Press the Other button. Thethermostat will display theWi-Fi SETTINGS menu.3. Press the Select button.4. The message area of thethermostat will displayTHERMOSTAT followed by thelast four digits of thethermostat’s Wi-Fi moduleserial number. This is thenetwork name (SSID) you willuse to connect to thethermostat.5. Use a Wi-Fi-enabledsmartphone, tablet, orcomputer to connect to thethermostat. Open settings onyour device, select Wi-Fi, andselect the THERMOSTAT####name displayed in Step 4.6. You may receive a notiﬁcationthat you are connected to anon-secure network. Select OKor CONTINUE.PNM Wi-Fi Web-Programmable Thermostat User’s Manual13LETTER8.5” X 11”PNMMAN1902–PNM IT801 User ManualPiece: ManualQuantity: XXXXXSize: 8.5 x 11”Colors: 4/4Finishing: Fold, TrimMail: N/ACREATIVEDIRECTORPROOFREADER Program Specific ChecklistCOPYSUPERVISORCOPYWRITERPhone NumberURLProgram AGER

PNMMAN1902PNM IT801 User ManualJob Opened: February 1, 2019Requested In-Home Date: FebruaryLatest Revision: April 5, 2019Approved:Step 3: MenusA. Wi-Fi Settings Menu (continued)7. Open the web browser on your device. If your browser is set to automatically open aweb page, the IntelliTEMP conﬁguration page, as pictured to the right, shouldautomatically appear.8. If the settings page does not appear after a few seconds, type “directlink/settings” inthe browser's address bar, then press ENTER. If the IntelliTEMP conﬁguration pagestill does not appear on the thermostat Main Menu screen, press the button nextto Menu. Then press the button next to Other. The thermostat will display the WiFi SETTINGS menu. Press the button next to Select. The message area of thethermostat will display the Wi-Fi Network Name to which you are currentlyconnected. Press the button next to Next. The IP Address of your device will bedisplayed in the thermostat’s message area. In the browser bar of your device, type“http://” followed by the IP address displayed on the thermostat. Press ENTER.The IntelliTEMP conﬁguration window will open.9. Use the dropdownmenu on theconﬁguration pageto select your usernetwork name.10. If your wirelessInternet router isset to hide thenetwork name oryour network is notlisted in thedropdown menu,click on the linkbelow the menu todisplay the manualsettings page.11. Enter the Security Key or password for your wireless Internet access.12. Enter the Install Code for your thermostat. This is the thermostat's serial numberas it is at the top of the screen.13. Once all ﬁelds are ﬁlled in correctly, click on the Save button.14PNM Wi-Fi Web-Programmable Thermostat User’s ManualLETTER8.5” X 11”PNMMAN1902–PNM IT801 User ManualPiece: ManualQuantity: XXXXXSize: 8.5 x 11”Colors: 4/4Finishing: Fold, TrimMail: N/ACREATIVEDIRECTORPROOFREADER Program Specific ChecklistCOPYSUPERVISORCOPYWRITERPhone NumberURLProgram AGER

PNMMAN1902PNM IT801 User ManualJob Opened: February 1, 2019Requested In-Home Date: FebruaryLatest Revision: April 5, 2019Approved:Step 3: MenusA. Wi-Fi Settings Menu (continued)14. The settings page will now show an overview of the settings youentered. If all settings are correct, click on Apply. If you need tocorrect any settings, click on Cancel.15. After clicking on Apply, the web page will now display the form shownon the right. The Wi-Fi thermostat will close the wireless Internetconnection to your device. It will then attempt to connect to your wirelessInternet accessible router. If there was an error detected in one of thesettings you will be prompted to return to the settings page and correctthe error.If you continue to have connectivity problems, please call the PNM Power Saver customer service center at1-866-471-7906.PNM Wi-Fi Web-Programmable Thermostat User’s Manual15LETTER8.5” X 11”PNMMAN1902–PNM IT801 User ManualPiece: ManualQuantity: XXXXXSize: 8.5 x 11”Colors: 4/4Finishing: Fold, TrimMail: N/ACREATIVEDIRECTORPROOFREADER Program Specific ChecklistCOPYSUPERVISORCOPYWRITERPhone NumberURLProgram AGER

PNMMAN1902PNM IT801 User ManualJob Opened: February 1, 2019Requested In-Home Date: FebruaryLatest Revision: April 5, 2019Approved:Step 3: MenusB. Filter Timer Settings MenuThe ﬁlter timer is an indicator to the user to check or replace the HVAC air ﬁlter.Filter Timer Menu allows you to set the number of days before the CHANGE FILTER alert appears in the thermostat display.It also allows you to disable the ﬁlter timer and the Reset Filter Timer. The default setting is 90 days, but ﬁlters should bechecked every month. How often you change them can impact the quality of your indoor air and the efficiency of your HVACsystem. To set and reset the ﬁlter timer:1. Press the Menu button. TheProgramming menu screentitle will appear in themessaging area.2. Press the Other button toadvance the menu screen tothe Wi-Fi SETTINGS menu.3. Press the Next button to advanceto the FILTER TIMER screen.4. Set the number of days untilthe CHANGE FILTER messagewill appear in the displaywindow by pressing theorbutton. The daysetting will advance or regressin 5-day increments.5. Press Done.To disable the ﬁlter timer:1. Press the Menu button. TheProgramming menu screentitle will appear in themessaging area.2. Press the Other button toadvance the menu screen tothe Wi-Fi SETTINGS menu.16PNM Wi-Fi Web-Programmable Thermostat User’s Manual

The Wi-Fi web-programmable thermostat displays up to four stages of heat or cooling. If you have a heat pump, there could be as many as four stages of heat. The ﬁrst stage is the compressor operating and Stage 1 will appear on the thermostat screen. There may be up to three other stages - 2, 3, 4 - depending on how much additional heat is