ALT HEAT (Dual Fuel)= Heat pump+Alternate heat source like gas, propane, or oil. AUX HEAT (Single fuel)= Heat pump with Aux Electric heat strips. The difference is Aux heat will run with the heat pump when temps are cold enough outside.

Similarly, At what temperature should auxiliary heat come on?

Auixiliary Heat will turn on automatically when heat can no longer efficiently transfer heat from the outside air to heat pump. This is when the outside is around 35-40 degrees and the indoor temperature is around three degrees cooler than the thermostat setting.

Additionally, What are alternative heat sources?
5 Alternative Heating Sources for Your Home

  • Geothermal Heat Pumps. Geothermal heat pumps rely on consistent underground temperatures to efficiently heat a home during the winter. …
  • Heating Oil.
  • Pellet Stoves. …
  • Solar Heating. …
  • Under-floor Heating.

Is it bad if auxiliary heat comes on?

Is AUX heat bad? The short answer is no. In fact, aux heat is a critical mechanism that keeps your heat pump properly running when the outdoor temperature drops. Since this type of unit doesn’t work the same as a furnace, it can get cold.

How much more expensive is emergency heat?

As you can see, there is a severe increase in the cost of

$163.80 per week

when the emergency heat is in use in extremely cost weather.



What You Should Know About Heat Pumps and Emergency Heat.

Cost Breakdown Normal Operation at 30 Degrees for 1 week Emergency Heat Operation at 10 Degrees for 1 week
Watts per hour: 3000 watts 3000 watts + 15000 watts

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26 mai 2021

Does emergency heat come on automatically?

Your emergency heat setting automatically turns on when outside temperatures drop below a certain temperature, usually 30 degrees Fahrenheit. If you need to manually turn it on, you should call an HVAC professional to get your heat pump fixed.

When should you turn on emergency heat?

It is used when there is something wrong with first-stage heating (the Heat Pump itself). In other words, if you notice your house is cold and it isn’t heating properly and you went outside and noticed that a tree fell and crushed your heat pump, that would be a good time to switch to Emergency Heat.

What is auxiliary lockout temperature?

Auxiliary (AUX) heat is a second source of heat that comes with some heat pump systems. … If it gets colder outside than the set lockout temperature, your heat pump will use AUX heat. For example, if your AUX lockout temp is 40ºF or 4.4ºC, then AUX heat will come on when the outdoor temperature drops below 40ºF or 4.4ºC.

What are the 5 sources of heat?

Here are only some of your many choices for heating energy sources: natural gas, propane (LP), oil, coal, wood, electricity, heat pumps, ground source heat pumps and solar energy.

What is an example of heat source?

Typical examples of heat sources for heat networks are: gas boilers, Combined Heat and Power (CHP) plants, wasted heat (from industrial processes, wastewater treatment etc.) and biomass fuelled boilers.

How can I heat my room without a heater?


10 Ways to Warm Up at Home Without Turning on the Heat

  1. Close up any cracks in your window frame. …
  2. Reverse the direction of your ceiling fan. …
  3. Invest in the best blankets. …
  4. Make your curtains work harder. …
  5. Use draft stoppers on your doors. …
  6. Cover your floors with rugs. …
  7. Prevent drafts around electric outlets.

What does it mean when AUX heat comes on?

What Does It Mean on My Thermostat? If your aux heat indicator is on, it means your heat pump needs a little help reaching its target temperature setting. Aux heat comes from the same heat source as emergency heat, but aux heat works together with your heat pump, so it’s less expensive than emergency heat.

Why does my AUX heat keep coming on?

The AUX heat setting on an HVAC unit usually turns on when you need heat fast. If this secondary heating system is constantly running, it may mean that the weather outside is very cold or that the thermostat is set higher than normal. It’s also possible that a part of the heat pump is malfunctioning.

What causes AUX heat to come on?

Aux heat should only kick on when the heat pump can’t produce enough heat to warm your home on its own. 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.

What is the difference between emergency heat and regular heat?

Heat pump systems have two units – one outside the home and one inside the home. The unit outside your home is a heat pump and the unit inside the home is the auxiliary heating system. … The emergency heat setting has to be manually switched on and should only be used in temperatures below 30 degrees.

What is the drawback of emergency heat?

What is the drawback of emergency heat? The supplemental heat costs more to operate than a heat pump.

When should you switch to emergency heat?

It is used when there is something wrong with first-stage heating (the Heat Pump itself). In other words, if you notice your house is cold and it isn’t heating properly and you went outside and noticed that a tree fell and crushed your heat pump, that would be a good time to switch to Emergency Heat.

How do you know if your emergency heat is on?

Emergency Heat Mode Comes with a Red Indicator Light: When you turn your emergency heat on, you will see a red indicator light. This light tells you that your HVAC system is now operating in emergency mode, and it will remain on until you deactivate your emergency heat.

Why does my heat only work on emergency heat?

You should only use your heat pump’s emergency heating mode when it’s truly an emergency (e.g., your heat pump isn’t working in winter) because manually overriding your system means it won’t run as efficiently as it can—which will result in higher energy bills.

How do I turn on ecobee emergency heat?

To enable this system mode, go to Main Menu > Settings > Installation Settings > Thresholds > Auto Heat/Cool and select Enable.

Does emergency heat setting cost more?

Using Emergency Heat May Cause Higher Heating Bills: Emergency heat is more expensive than its traditional counterpart, so you will probably see a spike in your utility bills if you need to use it. You should use emergency heat for the shortest period of time possible.

What temperature is a heat pump not effective?

Heat pumps do not operate as efficiently when temperatures drop to between 25 and 40 degrees Fahrenheit for most systems. A heat pump works best when the temperature is above 40. Once outdoor temperatures drop to 40 degrees, heat pumps start losing efficiency, and they consume more energy to do their jobs.

How do I stop my auxiliary heat from coming on?


Tips for Avoiding AUX Heat Issues

  1. Schedule preventative maintenance every six months.
  2. Clean the areas around the outdoor HVAC unit regularly.
  3. Keep ducts and heat vents free of clutter.
  4. Don’t use the emergency heating setting for normal heating.
  5. Clean or replace the heat pump filter every month or two.

Can you turn off auxiliary heat?

Technically, Honeywell doesn’t have a built-in way to cancel auxiliary heat use, since it’s designed to be a backup method. There are several ways to avoid using the auxiliary heat on your Honeywell thermostat. The most popular solutions include: Turning Down The Heat.

What does heat pump lockout mean?

Option 9 (Heat Pump Lockout): Set at Of(f), the compressor (heat pump) will always run (with the auxiliary) no matter how low is the outdoor temp. If set to a specific temperature (i.e. 35), the compressor is locked-out and ONLY the auxiliary will run when the outdoor temp drops below the specified temp.