Should ac unit attic be insulated
Repair of the Attic

Should ac unit attic be insulated? tips for minimizing energy loss in the attic

Should ac unit attic be insulated? Over a poorly or not at all heated roof, a lot of expensive heat can evaporate unused into the sky from the sun. Not to mention the poor living comfort in winter and summer! One thing is certain: there must be insulation. Our checklist will help you decide between roof insulation and attic insulation.

Should ac unit attic be insulated

In this article you will get an answer to the questions:

— Should air handler in attic be insulated?

— Is it bad to have HVAC in attic?

— The Benefits of Proper Attic Insulation

— Why Attic Insulation Is Important

— Attic Air Sealing and Insulation Tips to Minimize Attic Energy Loss

— Should air handler in attic be insulated?

Should air handler in attic be insulated?

Is it bad to have HVAC in attic?

As is well known, it gets hot from the sun in residential buildings under the roof. The cooling demand in summer is, therefore – if you live here – the strongest. But also the most difficult to realize. With a few tricks and alternative options, however, you can still get a reasonably efficient air conditioning system.

Should ac unit attic be insulated
Should ac unit attic be insulated
Problems and solutions for an air conditioner in the attic

Installing an air conditioning under the roof – for example in a converted attic room – is always more gaps than on lower floors of buildings. This is mainly due to the following things:

— More heat under the roof

— Slopes for condensate drainage are more difficult to realize

— There may be no area for installing an outdoor unit

Gaps of condensation drainage

Should ac unit attic be insulated

With split air conditioning in the attic, condensation drainage can be a challenge. In order for the water that always collects in the indoor air during the cool mode to drain, the drain must be laid with a continuous slope. At least if you don’t want to install a pump.

A wall hole can be difficult without a gable wall side. If necessary, however, a hole can be made in a bathroom located further down in order to drain the hose, for example, into a cistern. Of course, a simple, only visually not particularly attractive variant is always to collect the water in a bowl, a bucket, or a watering can.

Installation of an outdoor

For split air conditioning, the attic situation can also be gaps for attaching the outdoor unit. If the roof space is not adjacent to a gable wall, where the compressor box can be installed, the interior installation is possible on a specially installed ventilation passage – but not particularly recommended because of the reduced efficiency.


Installing an HVAC system in the attic does not cost a lot of money. The main advantage of the payment system is its budget. Homeowners will save not only money but also energy savings nerves, saving themselves the hassle of conducting an air duct throughout a private home, calling specialists, or a special service.

The Benefits of Proper Attic Insulation

Attic insulation is a better choice if…

Should ac unit attic be insulated

– the roof covering etc. is still intact and the roof does not need any renovation.

– the attic is not used at all or only as a storage room.

– the attic should not be expanded in the future either.

Important to know: In certain cases, there is even a retrofit obligation for attic insulation! In these houses, the top-story roof must be heated.

With proper and high-quality attic insulation, weather changes cannot penetrate your home. What is this advantage for the residents of the house? Firstly, you will be calm that the indoor conditioned air comes from a proven and reliable source. Secondly, you can control the temperature, which of course increases the quality of life, as well as comfort.

The obvious advantage is significant savings on heating costs. The quality of housing can also increase significantly if, for example, external insulation is chosen as roof insulation, which increases the living space. However, effective roof insulation also contributes to the improvement of the residential HVAC system and sustainable climate protection.

Should ac unit attic be insulated

Here is an overview of the benefits of effective new roof insulation and attic insulation:

  1. Saving energy costs
  2. Independence from fluctuating energy prices
  3. Increase in the cost of the building
  4. Protection from moisture due to less condensation
  5. Noise insulation as a side effect
  6. Increased home comfort
  7. Climate protection
  8. Cost savings due to government assistance

Should ac unit attic be insulated? Especially old buildings often consume far too much energy due to uneconomical insulation systems. After all, almost 25 percent of the heat is lost through the roof, a proportion that can go into the money over the years. Therefore, it is always useful to think about energetically more favorable insulation, especially with such buildings.

The cheapest method to insulate the roof, in this case, is certainly the intermediate rafter insulation, since it is often already available, especially in old buildings. The roof insulation is particularly energy-saving and therefore recommended.

The costs for installation are initially higher, but the increased efficiency has a significant saving effect in the long run. The increased living space is also an added plus here.

Should ac unit attic be insulated and Attic Insulation Options

There are two types of cold attic insulation in construction. You can use a loose filler or barrier insulation. The disadvantages of bulk insulation include the costs that the user faces. You will need to buy or rent equipment, a blow molding machine. It would be better if you hire specialists. The roll barrier insulation is much easier for the average user.

Should ac unit attic be insulated
Should ac unit attic be insulated

Why Attic Insulation Is Important

The attic insulation of the roof on the slopes can be complex. Rafter insulation can also be performed only by professional services. An inexpensive alternative is the insulation of the top floor ceiling – attic insulation. It comes into question if you do not want to live in your attic.

If you don’t install it, the unheated attic is a real increase in energy costs. The unused attic is permanently heated unnecessarily. In the summer, in turn, an uninsulated attic heats up unpleasantly. Under an uninsulated roof, heating costs increase, while home comfort decreases.

The insulation of an attic is quick and uncomplicated and ends both gaps. After all, every square meter of the top floor ceiling without insulation costs about ten to 15 liters of heating and cooling oil per year. This accounts for up to 20 percent of all heat losses!

Due to the good insulation of the upper floor ceiling, significant maintenance in heating and cooling costs can be achieved with little effort. Since there is no roof work as with roof insulation in the case of rafter insulation, experienced DIY enthusiasts can also install the attic insulation themselves.

If you are unsure or complicated circumstances make the renovation more difficult, you should better contact a specialist company.

In advance of your renovation and attic insulation, just clarify how you would like to use your attic in the future. Does it remain unused, or should it be available as a storage room? Depending on the usage requirement, there is walk–in and – more cost-effective—non-walk-in insulation.

Should ac unit attic be insulated

Read: How much does it cost to repoint a chimney?

Anti Air Sealing and Insulation Tips to Minimize Attic Energy Loss

You need to isolate the attic in order to minimize the costs of heat in winter and ventilation of the attic in summer. In addition, you can significantly energy savings for a comfortable stay.

According to the US Department of Energy, improved attic insulation (combined with airtight sealing and proper maintenance of HVAC systems) can reduce heating and cooling energy use by 20-50%.

You can also extend the life of your conditioned air HVAC system for your home in 2021.

But before you start doing attic insulation yourself, you need to find out exactly what materials should be used (equipment, insulation type, safety class), in addition, to what technology and security system.

We advise you to contact a specialist or a specialized company, as they will be able to provide a quality guarantee. They are the ones who will be able to properly seal the air ducts, ventilation levels.

The company can make you an energy audit, which is an energy assessment not of a part of the house (attic or room), but of the whole home. These professional services are paid, but it will allow you to save money in the future and not overpay for alterations, and also you will not waste time identifying those areas of your home that need to be heated or sealed.

We strongly recommend consulting with professional services to conduct an energy assessment of the entire house (energy audit). This will save you a lot of time in identifying areas in your home that need additional sealing and/or insulation.

Due to poor sealing, air leakage may occur, which means a deterioration in air quality (it can become either very dry or too wet). It is all this that can help determine the energy audit. It must be carried out immediately before the isolation is carried out.

Should ac unit attic be insulated

We have prepared tips for you on how to prevent conditioned air leaks.

1. Consultation with a job specialist or a company that professionals in HVAC system should be carried out before starting work. As part of the consultation and subsequent work, heat leaks should be detected.

2. Implementation of sealing in the attics:

– All surfaces with which you work must be dry and clean.

– Do not use adhesive tape during work. It can leave traces and spoil all sterility.

– With the help of a sealant and a sealer, the cracks around windows and doors, water pipes, conditioned air ducts, and electrical wiring are filled.

– Using foam, you will be able to isolate and prevent air leaks in the attics, cracks in the wall, a hatch to the attics, etc.

– Next, install foam gaskets behind the switching and exhaust plates. If you find a moisture spot on the insulation, you need to urgently check for leak or humidity accumulation, or find and eliminate the mold that has formed.

– If you have thin glass and it is not energy efficient, then we advise you to replace them with more durable ones.

– We recommend that you always keep the chimney flap closed when not in use. An inflatable balloon can be used as a guarantee of thermal insulation.

– With the help of sheet metal and refractory sealant, we recommend that you seal up the conditioned air leaks around the furnace. Also, this method is suitable for a water heater and a chimney. These areas become very hot from the sun at high temperatures. You should be very careful during work or ask for help from job specialists.

– Using an expanding foam sprayer during the work with the water pipe, you will be able to fill the water pipe. If the size of the water pipe is too large or non-standard, then use a sealer.

– Be sure to seal up all leaks in the duct. Even if you have not found any cracks or mold leaks, it is still worth isolating the duct, because it is the cause of a leak in it that you will lose about 30% of the cool air that you wanted to keep in 2021. Therefore, you “cool” the street.

– Mastic sealant will also help you insulate the duct.

Should ac unit attic be insulated
Should ac unit attic be insulated

Should air handler in attic be insulated?

Without adequate insulation and air sealing, a heating and cooling specialist should not even be able to correctly estimate the size of a unit needed for your home. To ensure that you have installed an appropriately sized HVAC system, an expert should perform a blower door test and thermal imaging analysis.

Air sealing and insulation improve these results and allow you to get a unit of the right size that is more energy-efficient and ultimately makes your home more comfortable.

After insulation, your heating and cooling systems do not have to work as often to keep the temperature constant due to the increased ability of your home to store heat in winter or keep it away in summer. This means that you will see advantages such as:

  • A properly sized for your home is more efficient
  • Lower monthly electricity bills
  • Less cycling
  • Fewer repairs
  • The longer service life of the HVAC system

The insulation with a high R-value (thermal resistance) ensures that the interior of your home remains comfortable with a constant temperature, depending on your preference and the season. It additionally helps to remove hot from the sun or cold zones from your home, reduce your energy costs and provide soundproofing. Depending on the areas of your home that need to be isolated, several types can be used.

Watch a video from the US Department of Energy for more attic insulation tips:

Summing up the results

Should I Isolate The Air Conditioning Systems? Don’t even doubt it! In this article, the reasons why you should isolate HVAC system systems were considered:

  • energy savings (you save on the electricity bills; you have no more questions with heating and cooling)
  • prevention of mold formation (control of condensation formation on surfaces)
  • noise reduction (moving ventilation to the attic guarantees the preservation of all noises out of your hearing).

An air conditioner is called an “air conditioner” because it does more than just cool the air. It also extracts moisture. Moist air stores heat energy more efficiently and are more difficult to cool. The dry air seems to be cooler and more comfortable.

On a humid summer day, an evaporator coil in a residential central air conditioner can extract up to 20 gallons of water from the household air.

By placing your air conditioner in the room, you should post to think about where such things as accommodation condenser, air ducts, evaporator as well. The article contains the things you should know before installing the system:

1) If you put a capacitor in an isolated attic, it will work much easier and harder. The truth is, to fix it or drain the water, you need to climb into the attic.

2) Blown insulation poses a great danger to capacitors. The wind rising from the condenser can carry dust around and eventually hit the condenser grille, blocking the airflow.

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