Frequently Asked Questions

The most frequently asked questions, except asking for prices of course. The answer here is clear:


1. What type of windows should I choose for my home - aluminum or PVC?

It depends on many factors: If windows are designed for home and are of conventional dimensions, so as their statics to be covered by PVC profiles, then this is the right choice. PVC systems hold very good insulating qualities, with ventilation and controlled drainage. Of course there are aluminum systems that commensurate to the qualities of PVC windows, even superior to them, but their prices are very high. This is the main reason to recommend PVC window systems for home.

2. What is the "k" or low emission glass?

This is float glass, which is bombarded with ions of silver or titanium in special cameras, to form a thin film, which is actually metal. This film rises glass packet surface temperature when heated by room temperature or sunrays. This type of glass has both large absorption and better reflection of long waves, which are the waves of the heating appliances. Glass packets from low emission glass have up to 30% better thermal insulation properties.

3. Can condensation appear between the two panes?

It can, but it's a sign of a default on the glass packet. It must be replaced. In our company within five years replacement is at our expense. Keep in mind that glass packets have a certain lifespan. If it is produced by the standards their life is over 10 years. How much will they last depends on many factors - way of production, number of barriers, type of adsorbent, size etc.

4. Will I have condensation inside the room?

Condensation is a problem of any window that is well sealed. This is pure physics and it can not be escaped. Any object with temperature below 9.3°C, if submitted to a room with a temperature of 20°C and humidity higher than 80% will condense. There are methods you can use to reduce condensation.

One method is to increase the temperature of the object (your window):

• Use glass packets with special low emission glass

• Install heaters under windows so that the rising up warm air first raises the temperature of the window and then moves the air around it so that there is no time for this air  to be in contact with the cold surface  to form condensation.  

• When not in the room or the light is not on, pull the curtains or blinds over the window. The air around windows moves and reduces condensation.

Another method is to lower the humidity in the room. It could be done in several ways:

• Ventilate properly. This is done when the window is wide open for a few minutes. If the room temperature is 20°C and the window is wide open for several minutes, warm air, which is with high moisture percentage will be replaced by cold air. Cold air is generally dry. It heats quickly and when you close the window, just in a few minutes the room temperature will rise again to 20°C, more so those few minutes will not cool enough walls and furniture as to feel yourself uncomfortable in the room.

Install a ventilation valve. This device controls fresh airflow into the room. It allows your hood or fan to work effectively, because with airtight windows, hoods and fans create high underpressure. Most people have noticed that aspiration functions better when a door or a window is ajar.

Summarizing the above said, we can say that condensate depends on the microclimate in your home.

5. Where are the pitfalls in the selection of PVC windows?

In our industry there is always a fight for customers. In this regard, each company strives to offer the lowest price possible. There are many ways to reduce price. What the customer sees as a finished product is the actual PVC window or door. There are infinitely many window elements that remain invisible to non-specialists. Replacement of elements leads to reduction in price but also to poor quality.

We will mark only some of the elements:

Supporting metal.

In German PVC systems that set the standards and guidelines for the development of window systems, metal thickness is always minimum 1.5 mm. If this requirement is not met, strength and linear expansion of the profiles is compromised. To reduce the price the company can replace supporting metal with a thinner one.

Fasteners and fixtures.

All fasteners must be specially coated against corrosion. We use mainly "Wuerth" fasteners.


There are many types of hardware on the market nowadays - in origin and quality. The most common and market proven are the German and Austrian systems. The hardware we work use is "Roto". "Roto" is the leader in the field of window systems hardware. Special nanocoating ensures resistance against aggressive humid air. This hardware is burglary resistant too.

6. Ventilation valves Aereco

We offer an intelligent solution to moisture and mold - French ventilation valves Aereco.
When installing quality windows and insulation, we seal our home, do not let it "breathe", and that is a prerequisite for the emergence of moisture and mold. Our home needs a constant supply of fresh air.

Aereco window valves provide this air to our home. They are fully automatic, silent and without power consumption, with sleek design and can be fitted to all types of windows. The types we offer are with additional manual closing in case of strong winds, smoky external air and other extreme situations.

How it works?

With humidity excess in the room, a built-in sensor activates an actuator that opens the valve and increases the outside air flow while room air leaves through the ventilation vents.

Humidity sensor is factory set not to react to humidity in the room lower than 35% - 40%. Above these values, it gradually opens the valve and lets outside air in, thereby creating sufficient traction to lead humid and polluted air out through ventilation vents. Humidity sensor provides the necessary thrust to fans and hoods at home, so the moisture disappears not only in the rooms where valves are installed, but in the bathroom, glass-enclosed balcony etc..

 Do I need to install additional vents?

Air valves let in only air. In order to get air circulation, the house should have outlets with natural draft vents. Most often they are in bathrooms or in the toilets. To reach the vents, room air needs to flow through a slit under the doors no more than 1 centimeter wide. If door is tightly sealed, it should be left ajar or grills should be installed at door’s lower end.

Valves Aereco - advantages

• Solve the moisture problem forever

Automatic control of fresh airflow into the room

• Operates without electricity and batteries

• Can be installed on any type of frame. It is recommended that this be done in a factory, but can be additionally installed as well.

• They keep the warmth in your home and provide you with healthy air.

• Forget morning headaches and respiratory problems caused by humid and polluted air in your home.

• They are silent

• They are stylish

Welcome to our offices to acquaint you with the product.

Solve the problem of moisture and mold FOREVER!
7. How to choose the right company?

There are over 800 window and door companies just in Varna, but many of these companies are phantoms. How to choose the company which will satisfy your expectation? Here are our recommendations how not to get ripped off:

• The company must have a showroom where you can see the "live" samples of windows will be professionally consulted.

• Ask to see the documented system for production control or quality management certificate. The above ensures that the company produces and installs according to standards.

• The company must put a CE Mark on their products and issue a product conformity declaration.

• Sign an agreement.

• Request an invoice for each payment you make.

• Ask for the warranty period. Warranty period for these products is by law (SPA) 5 years. Ask for a warranty card.

• Choose a company whose production site is near your city, so you can ensure rapid response to the need for maintenance.

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