7 Best Mini Split Heat Pumps for Cold Weather

Erica Puisis

Written By

Erica Puisis

Expert Reviewed By

Dean Zoet

Last Updated On

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Battling indoor temperature swings during the winter chill? Been there!

Over the years, I have installed dozens of heat pumps to help my customers achieve what we all want—year-round comfort.

In this guide, I’ll share my favorite mini split models for cold weather, which is where some models can fall short. 

Quick Glance - My Recommendations

Pioneer Air Conditioner WYS012G-20 Wall Mount...

Pioneer WYS Series

  • Options for every room size
  • 5 year compressor warranty
  • Advanced inverter technology automatically switches from heating to cooling

Senville AURA Series Mini Split Air...

Senville AURA Series

  • Works with Alexa
  • Long warranty
  • Energy Star Certified
Friedrich Air Premier FRHW123A

Friedrich Floating Air Premiere Series

  • Auto-restart feature
  • Optimal efficiency
  • Wi-Fi enabled

Mini-split heat pumps aren't just winter warriors; they're cool in the summer, too.[1]

Thanks to their innovative inverted heat pump technology, staying cozy was a breeze, all while fine-tuning my overall energy consumption.[2]

Before my top-notch mini-split, I'd sweat buckets and freeze like a popsicle.

Cold climate heaters are reliable, each tackling frosty temperatures.

Before installing the best mini-split heat pump, I compared energy use, cooling power, Energy Star ratings, and inverter tech.

My metrics were versatile comfort that beats the heat and conquers the chill.

6 Highly Rated Mini Split Heat Pumps

1. Pioneer WYS Series

4.8

Overall Score


Energy Efficiency

4.5

Current Progress
Current Progress
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Cooling Ability

5.0

Current Progress
Current Progress
Current Progress
Current Progress

Value for Money

5.0

Current Progress
Current Progress
Current Progress
Current Progress

SEER (low)

17.5

SEER (high)

21.5

HSPF (low)

9.5

HSPF (high)

12

Pros
  • Options for every room size
  • 5 year compressor warranty
  • Advanced inverter technology automatically switches from heating to cooling
  • Energy-efficient models save money
  • Ultra-quiet operation
CONS
  • No smart features
  • Remote has a poorly lit back screen

The Pioneer WYS Series is my top choice mini-split to battle the cold. 

Whereas some mini-splits start to fail when the temperatures reach below freezing, the Pioneer WYS Series keeps powering on through, all the way down to temperatures as low as -13F.

This series is my top recommendation for single-room additions, primarily because this split heat pump seamlessly transitions from heating in cold weather to cooling in the summer.

My favorite feature is the automatic switchover mode, which takes care of the decision-making, seamlessly switching between the four operating modes: cooling, heating, dehumidification, and ventilation.

It has become the perfect companion to my home’s sunroom. While its 12000 BTU model is ideal for my 500 square foot space, Pioneer offers the WYS series models in sizes ranging from 9000 BTUs to 36000 BTUs. 

Because the WYS Series uses an inverter compressor to change speeds incrementally as needed, these models have impressive SEER ratings, ranging from 21.5 on the 9000 BTU model to 17.5 on the 36000 BTU model. 

The HSPF ratings are good too. I consider anything above an 8.2 to be energy efficient in a heat pump, and the models in this series all have an HSPF of at least 9.5.

Perhaps the most impressive feature of this Pioneer mini-split is it’s nearly silent, running as low as 23 dB. Only mini-splits can pull off this silent operation, as their compressors are entirely outside.

Even the largest 36000 model operates at just 40 dB, which is comparable to the quietest window air conditioners on the market.

Installation is not complicated, although I do recommend allowing a professional to do the work. 

I really appreciate that Pioneer had the forethought to include 16 feet of copper wiring with this kit.

 It’s probably the most expensive component in any wiring job, and I hate having to tell customers that they need to figure in the cost of extra copper wire. These units are also pre-charged, which means I don’t need to add refrigerant. 

Pioneer models might not have the smart features that the Senville Aura does, but they are the best straightforward mini split out there.

The 5-year parts and compressor warranty are the icing on the cake for choosing Pioneer.

Pioneer WYS012-19

Who should buy the Pioneer WYS Series mini split heat pump?

I recommend the Pioneer WYS Series to folks who are looking for energy-efficient year-round comfort with straightforward controls.

Feature

Details

BTU Options Available

9000, 12000, 18000, 24000,
30000, 36000

Heating Coverage Area

200 - 1300 square feet

Voltage

115 or 230

Warranty

5 Years Parts & Compressor


2. Senville AURA Series

4.8

Overall Score


Energy Efficiency

5.0

Current Progress
Current Progress
Current Progress
Current Progress

Cooling Ability

5.0

Current Progress
Current Progress
Current Progress
Current Progress

Value for Money

4.5

Current Progress
Current Progress
Current Progress
Current Progress

SEER (low)

19.5

SEER (high)

28.1

HSPF (low)

10

HSPF (high)

11.5

Pros
  • Works with Alexa
  • Long warranty
  • Energy Star Certified
  • All-in-one system
  • High heating capacity
CONS
  • Requires professional installation

The Senville Aura Series is the top-of-the-line when it comes to mini-split heat pumps. The only reason it doesn’t take my top spot on this list is because, unlike Pioneer systems, the Aura Series also comes with a premium price tag. 

For those with the budget, I absolutely recommend the Aura Series for effective mini-split heating. Their systems can withstand temperatures as low as -22F, a spec only matched by the Cooper & Hunter models.

I recently installed the 24000 BTU model in a buddy’s cabin in Michigan, and I’m confident it will get him through even the coldest nights. Senville has models that can cover your space of 400 - 2250 square feet with ease. 

Like the Pioneer WYS Series, the inverter compressor is covered under warranty for 5 years. However, all other parts are covered for 10 years, which I love for peace of mind. 

The Aura Series, while it does have a high upfront cost, is more energy efficient than the Pioneer WYS series, with their 9000 BTU unit having the highest SEER of the range (a phenomenal 28.1). 

All of the Aura products are also Energy Star rated, and depending on where you live in the US, you may qualify for a government rebate. 

The real selling point for the Senville Aura Series is the smart controls, which are fully integrated with Alexa devices and app control. 

My buddy loves that he can start warming his cabin during his three-hour drive so that it’s perfectly cozy by his arrival.

Those who value true silence will likely opt for the Pioneer WYS series, but the Senville Aura Series is not too far behind, with operating levels ranging from 35 to 46 dB, which can be compared to the hum of a refrigerator. 

While some mini-splits have a DIY option for installation, the Senville Aura Series must be installed by a professional, especially if you care to ensure your warranty and rebate. 

Senville AURA Series

Who is the Senville AURA Series best for?

The Senville AURA Series is great for those looking to control the temperature using smart technology.

Feature

Details

BTU Options Available

9000, 12000, 18000,
24000, 33000

Heating Coverage Area

400 - 2250 square feet

Voltage

230

Warranty

10 Year Parts / 5 Years Compressor


3. Friedrich Floating Air Premiere Series

Most Energy Efficient

4.6

Overall Score


Energy Efficiency

5.0

Current Progress
Current Progress
Current Progress
Current Progress

Cooling Ability

5.0

Current Progress
Current Progress
Current Progress
Current Progress

Value for Money

4.0

Current Progress
Current Progress
Current Progress
Current Progress

SEER (low)

18

SEER (high)

28

HSPF (low)

10

HSPF (high)

12.5

Pros
  • Auto-restart feature
  • Optimal efficiency
  • Wi-Fi enabled
  • Compact design
  • Ductless heat pump system
CONS
  • Pricier than other models

For my clients who value energy efficiency over all else, I typically recommend the Friedrich Floating Air Premiere Series, even in the coldest climates. 

Like the Pioneer WYS series, this Friedrich Series can optimally function to temperatures as low as -13F. 

The Floating Air Premiere Series has only three models: 9000, 12000, and 24000 BTU options, but can comfortably heat and cool areas up to 1500 square feet. For larger spaces, I recommend looking into the Senville Aura series.

The SEER of the 9000 BTU model is a fantastic 28, with the 12000 BTU model only shortly behind at 24. The 9000 BTU also has the highest HSPF on my list at 12.5, making it the overall most efficient model.

The 18000 BTU model is still energy efficient, but with an SEER of 18 it is not Energy Star Certified like the two smaller models. 

The 7-year compressor warranty is better than Pioneer and Senville’s 5 years, but what really impresses me about Friedrich’s warranty coverage is that they include 5 years of labor. 

I want to share upfront that while some mini-splits, like the Pioneer and Senville options, come with their line sets, these Friedrich Floating Air units sell theirs separately. 

This is nice for choosing the exact size you’ll need between 15 and 50 ft, but it does come with an additional cost of up to $250. 

That said, I like installing Friedrich models because I can install them more quickly than most other brands. Their FastPro design saves me time and my customers' money.

Once up and running, you can expect quiet heating and cooling. Indoor sound levels are similar to that of the Senville Aura (35 dB - 46 dB), but Friedrich even keeps their outdoor units in mind, and they max out at 59 dB, which is still quieter than most portable ACs.

Friedrich FRHW123A

Who is the Friedrich Air Premier for?

If energy consumption is the core feature you seek, then the Friedrich Air Premier model is your choice.

Feature

Details

BTU Options Available

9000, 12000, 24000

Heating Coverage Area

400 - 1500 square feet

Voltage

230

Warranty

7-Year Compressor Warranty, 5-Year Parts and Labor Warranty


4. Cooper & Hunter Hyper Heat Series

4.5

Overall Score


Energy Efficiency

4.5

Current Progress
Current Progress
Current Progress
Current Progress

Cooling Ability

4.5

Current Progress
Current Progress
Current Progress
Current Progress

Value for Money

4.5

Current Progress
Current Progress
Current Progress
Current Progress

SEER (low)

20.5

SEER (high)

25

HSPF (low)

10.3

HSPF (high)

11.5

Pros
  • Ductless heating
  • Energy saving mode
  • Suits freezing climates
CONS
  • DIY setup voids the warranty

Cooper & Hunter is a popular mini-split company that goes by the tagline “addicted to comfort.” 

Whereas many brands fail to create a mini split heat pump that can truly function in below-freezing conditions, C+H took that as a challenge, and the Hyper Heat Series was born with the colder states in mind (I’m looking at you, upstate NY). 

Similar to the Senville Aura Series, The C+H Hyper Heat models can function at temperatures as low as -22F. 

Cooper and Hunter doesn’t have as many options available as the Aura Series does. Like the Friedrich Floating Air Premiere Series, C+H includes options for 9000, 12000 and 24000 BTUs. 

They also match Friedrich’s impressive warranty of 7 years on the compressor and 5 years on parts (labor not included). 

The only caveat is that they are very stingy about the product having been registered within 60 days of installation, so I cannot stress to you how important it is to do that right away.

Everything needed for standard installation is in the kit, including a three-layer insulated and pre-flared 16-foot line set. However, like most of the brands on my list, Cooper & Hunter does require professional installation.

My only gripe with the Cooper & Hunter Hyper Heat Series is that they are advertised as being “WiFi Ready.” While they can be paired with your phone and Amazon Alexa devices, they require a separate USB adaptor that is sold separately. 

This has become a huge frustration for my clients, who have thought we’d be online straight out of the box.

Once the adaptor is connected, smart controls are nice though, much like the Senville Aura Series

Cooper & Hunter Hyper Heat

Who is the Cooper & Hunter Hyper Heat Series Best For?

I recommend C+H to those who prioritize heating over cooling, as the Hyper Heat Series was made for extreme weather.

Feature

Details

BTU Options Available

9000, 12000, 24000

Heating Coverage Area

400 - 1500 square feet

Voltage

230

Warranty

7-Year Compressor Warranty / 5 Year Parts Warranty


5. MRCOOL

4.4

Overall Score


Energy Efficiency

4.25

Current Progress
Current Progress
Current Progress
Current Progress

Cooling Ability

4.0

Current Progress
Current Progress
Current Progress
Current Progress

Value for Money

5.0

Current Progress
Current Progress
Current Progress
Current Progress

SEER (low)

16

SEER (high)

22

HSPF (low)

8.9

HSPF (high)

10

Pros
  • Easier setup
  • Sleek and stylish design
  • UL Listed and AHRI Certified
CONS
  • Average heating capacity

There will always be the customer who calls me about installing a mini split, and wants it that minute. For the DIY handy-people, I recommend MR COOL mini splits

MR COOL units are often more money upfront, but I love that they really take all of the guesswork about installation. 

In fact, I always use MR COOL mini splits as a training opportunity for my new guys, because the intuitive MR COOL app assistant carefully walks you through each and every step.

Important Note:

Although installation is DIY, you will need a 230 volt outlet. If you don’t have one handy, you may need an electrician to help you install one.

Most of the brands I work with come with a 16 foot line set, if they come with one at all. I appreciate that MR COOL units actually come with a 25 foot line set, which makes installation a breeze (and leaves a bit of room for error). 

Probably most impressive to me is that even though MRCOOL allows homeowner installation, they still match the warranty of Cooper & Hunter and Friedrich. This tells me that they really stand behind their product.

MR COOL Mini Splits can reliably work to temperatures down to 5F. I know that’s not as impressive as the Senville Aura’s -22F, but realistically, MR COOL will keep you warm in most situations – especially if you’re using it as supplemental heating. 

Unfortunately, MRCOOL is the only brand on my list that doesn’t include a 9000 BTU option, which is a bummer because it’s such a popular mini-split size. They do offer 12000, 18000, 24000 and 36000 BTU options though, making them an excellent choice for larger spaces. 

The SEER ratings aren’t bad for DIY units, although I will say that the 36000 BTU MR COOL model does have the lowest SEER on my list –16. If you’re looking for something in the 36000 BTU size range, I would suggest considering the Pioneer WYS series for long term savings.

MRCOOL

Who should buy the MRCOOL mini-split heat pump?

This MRCool model is best for homeowners like me who want to avoid installation costs.

Feature

Details

BTU Options Available

12000, 18000, 24000, 36000

Heating Coverage Area

500 - 1500 square feet

Voltage

230

Warranty

7 Year Compressor / 5 Year Parts


6. Daikin Atmosphera Series

A Comfort Powerhouse

4.4

Overall Score


Energy Efficiency

4.5

Current Progress
Current Progress
Current Progress
Current Progress

Cooling Ability

4.5

Current Progress
Current Progress
Current Progress
Current Progress

Value for Money

4.25

Current Progress
Current Progress
Current Progress
Current Progress

SEER (low)

22

SEER (high)

27.5

HSPF (low)

-

HSPF (high)

-

Pros
  • Versatile operating modes
  • Smart comfort features
  • 3D airflow
  • Easy maintenance
CONS
  • Only iOS app available

Daikin is a popular AC brand, and their mini splits have impressed me as well. I recently installed the Daikin Atmostphera 24000 BTU model in my garage workshop for year-round comfort, and it doesn’t disappoint. 

Like the Friedrich and Pioneer options on my list, the Daikin Atmosphera Series can happily heat to ambient temperatures if the outdoor temperature is above -13F. 

There are 3 models available in the Atmosphere Series: 9000, 18000 and 24000 BTUs. 

My favorite feature of this series is the Daikin “Power Mode,” which works to boost cooling or heating power for a fixed time of 20 minutes. This is really great for setting right before you’re planning to use a room to get it just to the right temperature. 

I do try to use it sparingly, though, as Power Mode is louder and I’m sure a bit taxing on the compressor.

Installation is straightforward, and while it does require a professional, I would like to note that the line set will be an additional cost and is not included with the base unit. 

This makes Daikin the most expensive brand on my list overall. 

However, that high price does come with reliable products. 

The Atmosphera Series has some of the most energy-efficient products on my list, ranging from 22-27.5 SEER, just barely behind the Friedrich models.

Some people might say that a 12 year limited parts warranty is the best warranty featured on my list.

As an HVAC professional though, I tend to find “limited” warranties to be my least favorite, as they are usually to the brand’s discretion. 

Important Note:

Due to restrictions, Daikin mini splits are not available for purchase in the following states: CA, HI, MA, MI, NV

Daikin Atmosphera

Who is the Product Name best for?

The Daikin Atmosphera  is best for those who want multiple operating modes for finding the best comfort settings.

Feature

Details

BTU Options Available

9000, 18000, 24000

Heating Coverage Area

400 -1500 sq. ft.

Voltage

230

Warranty

12 Years Limited Parts Warranty


Comparing Mini Split Heat Pump Models for Cold Climates

Preview

Rating

SEER (low)

SEER (high)

Lowest Operating Temp.

Price

Pioneer Air Conditioner WYS012G-20 Wall Mount...

Pioneer WYS Series

4.8

17.5

21.5

-13F

Senville AURA Series Mini Split Air...

Senville AURA Series

4.8

19.5

28.1

-22F

Friedrich Air Premier FRHW123A

Friedrich Floating Air Premiere Series

4.6

18

28

-13F

Cooper & Hunter Hyper Heat 12,000 BTU 21 SEER...

Cooper & Hunter Hyper Heat Series

4.5

20.5

25

-22F

MRCOOL - DIY-36-HP-230B25 DIY 36k BTU 16 SEER...

MRCOOL

4.4

16

22

5F

Daikin Atmosphera

Daikin Atmosphera Series

4.4

22

27.5

-13F

How to Choose The Perfect Mini Split Heat Pump For Colder Climates

1. Know the Size of Your Home

I compared various heat pumps for cold weather to determine which fit the provisions for my existing heating system.

This review's mini-split heat pumps are compact enough to fit a small square-foot room. Some don't even require strenuous ductwork.

Measure the square footage, consider the layout, and account for insulation or any potential leaks.

2. Figure Out the Heating Capacity Needed (BTUs)

The best mini-split system should offer optimal temperatures in your home while being cost-effective.

mini split BTU capacity needed

First, check the British thermal units.[9] The MRCOOL, for instance, has fewer BTUs than the Senville SENA series.

Besides my home's insulation, I factored in the local climate and the number of windows. This way, I knew the ideal heating capacity for comparing the mini-splits.

ACLAB Note:

Do not oversize your AC as that could lead to short cycling.

3. Assess Cold Climate Performance

Some heat pumps are cheaper but can't brave the coldest days. So, I reviewed each heat pump for cold weather based on its efficiency in frigid climates.

The best mini-split heat pump should be optimal in sub-zero temperatures.

The Senville AURA Series, for instance, doesn't have to work hard in a very cold climate due to its high heating capacity.

4. Explore Energy Efficiency Ratings

Energy efficiency is crucial in colder climates, where heating demands are higher. I dread hefty energy bills, especially in winter.

Besides the British thermal units of a heat pump, SEER and HSPF are worth considering.

The higher the SEER and HSPF rating, the more money I save on energy bills.

I'd pick the Cooper & Hunter Series among all other mini-splits due to its high SEER rating. It saves money while reducing my environmental footprint.

ACLAB Note:

Get a model with an inverter compressor as they are the most efficient.

5. Consider Zoning Options

A multi-zone mini-split system is suitable for rooms with varying heating needs.

It's like having a thermostat for each room. These ductless mini-splits allow for precise temperature control in each zone.

Ductless mini-splits, such as the Senville SENA or Cooper & Hunter Series, come with zoning features. They make personalized climate control a breeze.

6. Check Noise Levels and Installation Requirements

I didn't want my mini-split to sound like a jet engine taking off. Noise levels and setup requirements were my top-tier considerations.

Indoor units like the MRCOOL come with all the bells and whistles for easy DIY installation.

The Senville AURA series, however, requires professional installation. Going the DIY route with this model may void the warranty.

ACLAB Note:

Mini splits are generally very quiet. Far quieter in comparison to the quietest Portable or Window ACs. However, to get the quietest experience, get a unit with an inverter compressor.

ductless mini split air condioning layout

7. Review Warranty and Support

Mini-splits with subpar warranties are money pits. And if beneficial warranty conditions were my biggest concern, I'd buy a Senville SENA model.

It's among the few heat pump brands with tenable warranty terms.

Once installed, the Pioneer WYS012-19 and Cooper & Hunter Hyper Heat are the easiest to operate.

They have the latest tech features and a manual guide for quick and easy setup.


Very Cold Climate Considerations

I live in frigid climates, which can be stretching during those chilly winter days. The best mini split heat pump for cold weather should have a high BTU rating.

Most heat pumps for very cold climates come with dual-fuel capability, anti-icing technology, and variable-speed compression, among other advanced controls.

Here are some things to consider:

  • Assess Defrosting Capability:
    A heat pump with defrosting capabilities is effective in addressing ice buildup. I opted for one with an intelligent defrost cycle, so I don’t have to get up from my lazy chair.

    Plus, initiating the defrost cycle only when necessary keeps my electricity bills in check even in the coldest conditions.
  • Confirm Compliance with Very Cold Climate Setup Guidelines:
    Each brand I reviewed has specific guidelines for installing and operating their heat pumps in very cold climates. For instance, proper insulation and location of the outdoor unit are crucial for optimal performance. Some manufacturers insist on hiring a professional to ensure the configurations are accurate and withstand harsh conditions.
  • Verify Low-Temperature Operation:
    I checked each heat pump’s specifications to understand its temperature limitations. This way, it was easier to verify whether its capacity met the demands of my local climate during the coldest days. Each mini split has its low-temperature operating range. The Cooper and Hunter series I tested operated optimally even in sub-zero temperatures.
  • Consider a Dual-Fuel System:
    I prefer heat pumps with dual-fuel systems as they offer a seamless transition to an alternative heating source, such as a furnace. [10]
    It’s especially useful when outdoor temperatures drop to levels where the heat pump becomes inefficient. I also get to choose the most cost-effective heating source based on the prevailing weather conditions.
  • Check the Insulation and Cold-Weather Features:
    Inspect the mini split’s construction for robust insulation to keep the critical components from exposure to the elements. Heat pump systems also need protection from frosting and freezing to maintain consistent performance.
    Some cold-weather features I’d also consider include weather-resistant coatings and anti-corrosion treatments, as they contribute to the heat pump’s longevity.
frigid temperatures can affect mini split heat pump

ACLAB Note:

Since Heat Pumps literally pump the outside air into the room, if the outside temperature gets too cold, they either lose their efficacy or do not work at all. Hence it is always best to check the operating temperature of the heat pump and compare that with how cold it gets in your area.


FAQs

Do Mini-Splits Use a Lot of Electricity?

Mini-splits use an average of 500 to 1500 watts per hour. Mini splits save money on energy use in contrast to electric baseboards. They are far more energy efficient, and their proper sizing suits small spaces.

How Long Do Mini Split Heat Pumps Last?

While the lifespan may vary, a heat pump should last between 15 to 20 years with proper maintenance and care. Regular maintenance, professional installation, and adherence to manufacturer guidelines contribute to a mini-split’s longevity.

Can I Leave My Mini-Split On All The Time?

Mini-split systems are built to operate continuously and can be left on for extended periods. Leaving your mini-split on all the time also depends on your energy efficiency goals.

Do Mini Splits Turn Off When the Temperature is Reached?

Mini split heat pumps come with a thermostat that regulates the indoor temperature. The system cycles off to maintain the set temperature. A thermostat ensures your heat pump functions efficiently and only as needed.

How Often Should You Clean Your Mini Split?

Cleaning your mini split at least once per month during periods of heavy use, such as summer or winter, should suffice. A more thorough cleaning by a professional at least once a year should help remove dust, debris, and potential mold growth.

So, Which is Best For You?

The best mini split heat pump for cold weather should tackle indoor temperature fluctuations while being energy efficient.

Getting a mini split heat pump that activates energy-saving mode helps cut on heating bills.

While the goal is to save energy, other features like anti-frosting, BTU, energy efficiency ratings, and dual-fuel capacity, among others, are worth considering. Overall,

I recommend the Pioneer WYS012-19 as the best mini split heat pump for its efficiency and reliability.

My #1 Recommendation
Pioneer WYS Series

  • Options for every room size
  • 5 year compressor warranty
  • Advanced inverter technology automatically switches from heating to cooling
  • Energy-efficient models save money
  • Ultra-quiet operation

References: 

  1. https://www.sciencedirect.com/science/article/pii/S2214157X22005962
  2. https://www.daikin.co.nz/blogs/buyers-guide/what-is-an-inverter-heat-pump-and-why-do-i-need-one
  3. https://www.csemag.com/articles/back-to-basics-introduction-to-dedicated-outdoor-air-systems/
  4. https://williamscomfortair.com/knowledge-center/what-is-a-good-seer-rating/
  5. https://www.sciencedirect.com/science/article/abs/pii/S2352710216301449
  6. https://www.energy.gov/energysaver/ductless-mini-split-heat-pumps
  7. https://www.amca.org/assets/resources/public/assets/uploads/FINAL-_AMCA___AHRI-MENA_Webinar-_deck_2__Dec_13__2021.pdf
  8. https://www.researchgate.net/publication/284902079_Study_of_R32_refrigerant_for_residential_air_conditioning_applications
  9. https://www.eia.gov/energyexplained/units-and-calculators/british-thermal-units.php
  10. https://www.goettl.com/expert-center/air-conditioning/what-is-a-dual-fuel-ac-system/
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Erica Puisis

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Erica Puisis
Erica's work has been featured in top digital publications such as Forbes, The Spruce, MyDomaine, and U.S. News & World Report. When she's not knee-deep in HVAC specs or testing the latest smart thermostat, you'll find her trying new coffee shops or at the local farmers market.

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