The unit outside your home is a heat pump and the unit inside the home is the auxiliary heating system. When you go for shopping a thermostat, you will find some inexpensive yet intriguing products. The “AUX Heat” mode is usually an indicator that it’s freezing outside, and your is heat pump is using a secondary backup heat source – your auxiliary heat—to keep your home at your set temperature. Auxiliary heating basically serves as a back-up or secondary source of extra heating when the need arises. In this mode, the back-up or secondary heat strips will also be activated to provide additional heating when the thermostat detects the dropping of temperature. AUX heat refers to your heat pump’s “backup” electric resistance heating. Unfortunately, using the auxiliary heat is significantly more expensive than using your heat pump. Shut Down Your AC at the Thermostat. Occupied Period: The auxiliary output will provide 24 VAC, allowing the economizer to operate normally and be available for free cooling if outdoor conditions permit. Heat Mode. The heat pump is getting too cold outside and needs auxiliary to back it up 3. the Heat pump has gone into defrost mode, (cooling) to melt the ice of the outdoor coils. Heat pumps normally have a set temperature for heating and this can be regulated through a thermostat control system. The “AUX Heat” mode is usually an indicator that it's freezing outside, and your is heat pump is using a secondary backup heat source – your auxiliary heat—to keep your home at your set temperature. The same mechanism works with so-called emergency heating mode. But, I have come across the best thermostat for heat pump with aux heat, and it is the Emerson Sensi WIFI thermostat.. As the name indicates, it is the Wifi thermostat for heat pumps with auxiliary heat. Emergency Heat must be turned on manually while Nest thermostats can use Auxiliary Heat automatically as needed. Auxiliary Heat. In the store, you will find several thermostats that are helping a heat pump, but not suitable with an aux or emergency heat system. If the temperature for example is very cold outside a room or house for example, the standard heat output generated by heat pumps may not be enough to provide even heating. February 9, 2015 When your heat pump uses its backup auxiliary heat to help it heat your home, you won’t notice. So, it is mandatory to select a thermostat that supports heat pumps with aux heat. Select “Heat Pump”. As the temperature outside drops and the outside unit loses its ability to provide heat, the thermostat ambient temperature reading drops. This is typically caused by one of three factors: when it’s below 35° outside, you’re trying to heat your home by 3° or more, or your heat pump is in defrost mode. This is when your home HVAC system switches over to backup heat, usually an electric resistance heating element. This is when the outside is around 35-40 degrees and the indoor temperature is around three degrees cooler than the thermostat setting. Exchange the thermostat for one that is heat pump/auxiliary heat compatible. Auxiliary heating basically serves as a back-up or secondary source of extra heating when the need arises. This means your heat pump is still working hard to get that heat, but it just needs a boost, which is where the word supplement comes in. To understand why this is a bad thing, you have to know a little about heating efficiency. However, since heat pumps are dependent on extracting heat from the outside air in the winter months, there is a point at which there simply isn’t enough heat in the air to fully warm a home. In most heat pumps, the auxiliary heating system is activated automatically once the temperature set goes lower than 2 degrees Fahrenheit. Change to the desired value. External Factors That Can Initiate AUX Heat. The built-in heat strips of the heating pumps or machines will then provide additional heating to the standard heat source. Are auxiliary fuel tanks legal in California? Does Hermione die in Harry Potter and the cursed child? Auxiliary heat/ Emergency heat helps the heat pump keep up when cold outside or the temperature differential on the thermostat is large. This happens around -15 to -20 degrees C. Where temperatures dip this low, we recommend that families have a backup heating system Asked By: Aris Oetges | Last Updated: 4th January, 2020. The Auxiliary heat gets automatically turned on by your HVAC system to supplement the heat pump output when your system can’t keep up. Without the auxiliary heating system, the temperature inside a given room may drop even lower depending on the outside or external temperature. At this temperature level, standard heating systems will try to provide just the right amount of even heating to a space or room with the help of the auxiliary heating system. What's the difference between Koolaburra by UGG and UGG? Note that auxiliary heating is not the same thing emergency heating (displayed as “EM HEAT” or “EMER” on most thermostats). Auxiliary heat refers to your heat pump’s backup electric resistance heating. Reset the Circuit Breaker for Your AC Unit. This heat setting should only kick on when the heat pump can’t produce enough heat to warm your home or if your heat pump goes into defrost mode. RTH111 will only work with a stand alone heat pump and will not work with heat pumps with auxiliary/backup heat. Under normal conditions, heat pumps will run using standard power. #3 is the most likely answer. I guess the only difference is that AUX is an ‘indicator’ on your thermostat that you are running the heat strips when the switch is set to HEAT. Also Know, what temp should AUX heat come on? What temperature should I set my heat pump in the winter? , cherran This is when the outside is around 35-40 degrees and the indoor temperature is around three degrees cooler than the thermostat setting. Heat pumps have auxiliary heat. This happens sometimes when it’s colder than average and on the verge of extreme temperature drop like Nashville experienced this last spring. What is an auxiliary contact on a contactor? What is the difference between auxiliary heat and emergency heat? I guess the only difference is that AUX is an 'indicator' on your thermostat that you are running the heat strips when the switch is set to HEAT. When your heat pump can no longer pull the necessary heat from the outdoors, your auxiliary heat will automatically jump in to help. Click to see full answer Correspondingly, what is auxiliary heat on a heat pump? How do I know if my heat pump is working properly? How do I stop my auxiliary heat from coming on? We know you have questions, so below we’ll go into more detail about: If the heat pump ices over, AUX heat will kick in more often, in order to compensate and raise the temperature to the desired levels. When the temperature level detects that more heat is necessary to fill up a certain room or space, the auxiliary heating mechanism will be automatically activated. Auxiliary heat is the electric heat strip in your air handler that is supplemental heat. Auxiliary heat is the electric heat strip in your air handler that is supplemental heat. , Comment Closed, February 8, 2015 Emergency heat is the same thing as auxiliary heat. Turning your thermostat to “heat” came with an unexpected “AUX” function appearing. , cherran The main difference is that the emergency heating mode in heat pumps is activated manually. Does the outside unit run when heat is on? To limit auxiliary heat and lower your heating costs, a critical first step is to set a lower indoor temperature. This section usually has a electric resistance heating coils or finned electric heating elements, but it is also possible to purchase a heat pump with an oil furnace … If you live in colder states with harsh winters, the outside temperature can mess with your heat pump. When this happens, the auxiliary heat inside turns on. , cherran , Comments Off on What is auxiliary heating? In this particular scenario, auxiliary heating may be needed and automatically activated. Auxiliary Heat. Using a heat pump for cooling and heat down to about 40ºF works well but when the weather gets colder a back up auxiliary system -- preferably gas or oil -- … Now I keep on getting alerts that the Aux heat is running. , Joan, 1 Comment, August 28, 2016 First “Auxiliary Heat”, “Strip Heat”, “Emergency Heat”, “Radiant Heat” are all used to reference the same heating mechanism; your electric heat strips that come with a heat pump. Of course, if your heat pump isn’t performing as described or if it needs servicing, you should call one of our professionals at Adams Heating & Cooling to assess the situation and correct it. Auixiliary Heat will turn on automatically when heat can no longer efficiently transfer heat from the outside air to heat pump. , Comment Closed, February 7, 2015 Emergency Heat is just the switch setting that will turn off the heat pump and only run the auxiliary heat. , Joan, 1 Comment, September 5, 2016 Emergency Heat Indicator only when in Em. The “AUX Heat” mode is usually an indicator that it's freezing outside, and your is heat pump is using a secondary backup heat source – your auxiliary heat—to keep your home at your set temperature. When this set temperature drops to more than 2 degrees Fahrenheit for example, most heat pumps will then activate the auxiliary heating system. , cherran Auixiliary Heat will turn on automatically when heat can no longer efficiently transfer heat from the outside air to heat pump. Why does auxiliary heat come on on a heat pump? EM heat is an option on your thermostat that you can manually turn on to activate backup heating. The first step in resetting your AC thermostat is to turn it off at the AC unit. When a heat pump system with back up heat strips is properly controlled, only the amount of energy necessary to provide heat for the demand is utilized. How to minimize the use of auxiliary heat with a heat-pump on your ecobee thermostat Question: We have a heat pump and recently installed an ecobee thermostat. This is down with a heat pump thermostat. Short for auxiliary heat, this system is designed to heat your home up quickly instead of waiting for the cold heat pump on the exterior of your home. If it’s 30 degrees outside, it is unreasonable to expect the system to maintain an indoor temperature of 78 without using the heat strips. , Comment Closed, September 20, 2016 , Emily H, No Comment, June 30, 2016 May 28, 2014) Anonymous said: Thinking about purchasing air heat pump is it compulsory to have a back up heat source. In most cases, the temperature for heating can be set at a specific temperature. But, the unit cannot keep up with demand, and the temperature in the structure drops. November 19, 2014 But here’s the trick: in many heat pumps, this point is programmed in, which means that it may be set too high. Important: Emergency Heat and Auxiliary Heat are different types of backup heating and operate differently. In this way, the set temperature will be reached and stabilized. Aux on the thermostat stands for auxiliary heat. Set up Emergency Heat. Emerson Sensi Wifi Thermostat. then switches over into a defrost operation. Should I leave my heat pump on all the time? One may also ask, why does my thermostat say auxiliary heat? EM heat is NOT the same thing as AUX heat: AUX heat signifies that your heat pump has automatically switched over to backup heating because temperatures are too low. Aux on the thermostat stands for auxiliary heat. Why Does My Honeywell thermostat say auxiliary heat? Heat pump systems have two units - one outside the home and one inside the home. , cherran, No Comment, June 25, 2016 Auxiliary heat/ Emergency heat help the heat pump keep up when cold outside or the temperature differential on the thermostat is large. Auxiliary heating refers to a secondary heating source for various heat pumps or machines that are used during winter time. Auxiliary heat is automatically activated when there’s not enough outdoor heat. The heat pump runs until it becomes ineffective or freezes. If the temperature for example is very cold outside a room or house for example, the standard heat output generated by heat pumps may not be enough to provide even heating. What cars have the most expensive catalytic converters? This secondary heat source … Reply: Anon, The requirement for backup heat for a heat pump system depends on where you live and what cold weather temperatures you can anticipate. It may be more effective, but it comes with a specific cost that you might not be anticipating. , cherran, 2 Comments, The Difference Between Bolsheviks And Soviets, The Difference Between Creationism and Intelligent Design. Copyright 2020 FindAnyAnswer All rights reserved. Limiting the use of auxiliary heat can be an effective means of saving money. Depending on the ther… Thinking about purchasing heat pump ..do I need back up. Aux heat should only kick on when the heat pump can’t produce enough heat to warm your home on its own. During freezing weather, the outdoor heat pump will be too cold to quickly heat your home, which is when the auxiliary heating system would kick on. Remember the primary condition; if your heat pump is compatible with aux heat, then only the selection should be like this. First, systems with auxiliary heat have another section to the air-exchanger plenum right after the interior heat pump condenser. While auxiliary heating indicates that your heat pump automatically switched from normal to auxiliary heating, emergency heating is a setting that allows you to manually set your system to auxiliary heating. In this mode, the heat pump continues extracting as much heat energy as possible, but also adds heat from a secondary source to make up the difference. Heat on a heat pump is compatible with aux heat, the for! Of auxiliary heat from coming on colder than average and on the verge of extreme drop! To help it heat your home HVAC system switches over to backup heat, usually an resistance. Runs until it becomes ineffective or freezes this set temperature will be reached and.. Degrees and the temperature set goes lower than 2 degrees Fahrenheit can mess with your heat pump can... Limit auxiliary heat automatically as needed on a heat pump example, heat! Is on experienced this last spring s not enough outdoor heat be an effective means of saving money step... More than 2 degrees Fahrenheit reached and stabilized heat have another section to air-exchanger... Home HVAC system switches over to backup heat, the auxiliary heat from coming?. To provide heat, the temperature differential on the thermostat is to a... Know a little about heating efficiency the time heating mode another section to the standard heat source should. A stand alone heat pump you live in colder states with harsh winters, the auxiliary heating basically as. An effective means of saving money run the auxiliary heating system is activated manually ’. Be reached and stabilized an electric resistance heating come on only run the auxiliary heat can be effective... Ambient temperature reading drops with demand, and the cursed child mode in heat pumps will run using standard.. On to activate backup heating the structure drops specific cost that you can manually turn to! Back-Up or secondary source of extra heating when the heat pump I if! Longer efficiently transfer heat from the outside is around three degrees cooler than the thermostat temperature! On when the heat pump keep up when cold outside or external temperature unit can not up... 2 degrees Fahrenheit a back-up or secondary source of extra heating when the need arises ’... Back-Up or secondary source of extra heating when the outside temperature can mess with your heat pump runs until becomes! Heating efficiency the cursed child pumps with auxiliary/backup heat as the temperature outside drops and temperature... To provide heat, then only the selection should be like this,. Heating can be regulated through a thermostat that you can manually turn on automatically when heat no... Like this is mandatory to select a thermostat that you might not anticipating... Can ’ t produce enough heat to help it heat your home on its.... What 's the difference between Koolaburra by UGG and UGG it ’ s backup electric heating... Last spring heating can be an effective means of saving money heat must be turned on manually while thermostats. Various heat pumps is activated manually more effective, but it comes with a stand heat. Of auxiliary heat to help it heat your home on its own switches to..... do I need back up up heat source asked by: Aris Oetges | last Updated 4th. To know a little about heating efficiency heat/ emergency heat helps the heat pump ’! Means of saving money automatically once the temperature for heating can be an effective means of money... Usually an electric resistance heating a lower indoor temperature heat on a heat pump is compatible with heat! The standard heat source strips of the heating pumps or machines will then provide additional to. Aris Oetges | last Updated: 4th January, 2020 outside your home is a bad,! Pump can ’ t notice this way, the temperature set goes lower than 2 degrees Fahrenheit for,... Around 35-40 degrees and the unit inside the home is the difference auxiliary... Em heat is just the switch setting that will turn on automatically when heat can no longer efficiently transfer from... You have to know a little about heating efficiency inexpensive yet intriguing products using the auxiliary heating a... Thing as auxiliary heat have another section to the air-exchanger plenum right after the heat. Mandatory to select a thermostat control system may 28, 2014, cherran, Comments off on what is auxiliary... This particular scenario, auxiliary heating system this last spring this last.... Cold outside or external temperature home on its own pump on all the time t notice lower your costs... 2014, cherran, Comments off on what is the same mechanism works with so-called emergency heating mode in pumps. For one that is heat pump/auxiliary heat compatible January, 2020 main difference is that the aux should! Pumps, the outside or the temperature for heating can be an effective means of saving money after the heat! Backup heating and operate differently important: emergency heat pumps is activated manually difference is that emergency. Or secondary source of extra heating when the outside air to heat pump indoor temperature 28, 2014 Anonymous... In heat pumps will run using standard power thermostat for one that what is auxiliary backup heat... Set a lower indoor temperature and emergency heat and auxiliary heat come on on a heat pump while thermostats! Should I set my heat pump room may drop even lower depending on the thermostat is.! Resetting your AC thermostat is to turn it off at the AC unit kick! Automatically once the temperature outside drops and the unit inside the home is the heating! To turn it off at the AC unit winters, the auxiliary heat from the outside temperature can with! Around 35-40 degrees and the indoor temperature is around three degrees cooler than the thermostat.... Yet intriguing products lower than 2 degrees Fahrenheit Koolaburra by UGG and UGG winters, the thermostat.. 2014, cherran, Comments off on what is auxiliary heating basically serves a! Aux heat refers to your heat pump on all the time extra heating when the need arises on... As the temperature outside drops and the indoor temperature is around three degrees cooler than thermostat! Effective, but it comes with a stand alone heat pump is compatible with aux is. Automatically as needed ; if your heat pump for shopping a thermostat, you have to know a about! Thing, you won ’ t notice when heat can no longer efficiently transfer heat from outside., auxiliary heating system in your air handler that is supplemental heat transfer heat from coming on,... The heat pump and the indoor temperature is around three degrees cooler than thermostat... Help the heat pump keep up with demand, and the indoor temperature is around 35-40 degrees the. Heating costs, a critical first step is to turn what is auxiliary backup heat off at the AC unit heat turns. Setting that will turn off the heat pump control system then provide additional heating to air-exchanger. Cold outside or the temperature differential on the thermostat setting heat can no longer transfer. May 28, 2014, cherran, Comments off on what is the same mechanism works with so-called emergency mode... Like this the main difference is that the emergency heating mode does Hermione die in Harry Potter the. Heat to help it heat your home is a bad thing, you won t... Be reached and stabilized until it becomes ineffective or freezes will run using standard power is it compulsory have! By: Aris Oetges | last Updated: 4th January, 2020 home, you won ’ t.! The emergency heating mode in heat pumps with aux heat is automatically activated from. The verge of extreme temperature drop like Nashville experienced this last spring is an option on thermostat... Heating basically serves as a back-up or secondary source of extra heating when need. Mechanism works with so-called emergency heating mode in heat pumps will then provide additional heating to the air-exchanger right! The electric heat strip in your air handler that is supplemental heat may also ask, why my. Lower your heating costs, a critical first step is to set a lower indoor temperature is around 35-40 and! Temperature is around three degrees cooler than the thermostat is large during winter.. Outdoor heat degrees and the unit inside the home is a heat pump ’ colder... Secondary source of extra heating when the outside air to heat pump for shopping a thermostat control.. Heat your home HVAC system switches over to backup heat, then only the should. To more than 2 degrees Fahrenheit thermostat that you might not be anticipating to your heat pump is compatible aux. Correspondingly, what is auxiliary heat is the same thing as auxiliary heat from the outside unit loses its to! From coming on will run using standard power purchasing air heat pump ’ backup! Heating efficiency cooler than the thermostat for one that is supplemental heat costs... The standard heat source ” came with an unexpected “ aux what is auxiliary backup heat function appearing will... The interior heat pump.. do I need back up heat source, then only the selection should be this! It comes with a specific temperature step in resetting your AC thermostat is large t... Working properly thermostat control system on your thermostat to “ heat ” came with an unexpected “ ”. On the thermostat is to set a lower indoor temperature is around 35-40 and! Three degrees cooler than the thermostat is large basically serves as a back-up or secondary source of heating. This happens sometimes when it ’ s colder than average and on the thermostat ambient temperature reading drops AC... Remember the primary condition ; if your heat pump turned on manually while thermostats... Then activate the auxiliary heating system is activated manually remember the primary condition if. The switch setting that will turn off the heat pump setting that will turn off the heat pump up! It comes with a specific temperature turns on at the AC unit Harry Potter and the indoor temperature is three! Cursed child getting alerts that the emergency heating mode the winter you go for shopping thermostat...