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Frequently Asked Questions

We are pretty sure that most questions you have for the moment are covered here. Take a moment to read it!

What are these ducts?

Most ducts are constructed of metal and installed by tradesmen called sheet metal workers. However, rigid fiberglass and flexible round ducts are also used, as well as “hollow” constructed spaces within the building – the space between floor joists is sometimes used as the return air path, for example.

How can I get the right duct for my house?

Code-making bodies recognize construction standards developed by SMACNA, the leading authority on duct construction and installation. SMACNA contractors should be considered your preferred source of HVAC Expertise regarding duct selection.


How often should we replace the HVAC system filter?

There’s no one-size-fits-all answer. The frequency of filter changes is driven by how much your HVAC system operates, which is driven by the severity of the seasons.

In some locations the cooling system might be in use more than four months of the year – to keep heat and humidity under control. If your house is in such a hot and humid location, you should pay a lot more attention to your filter than in an area where the air conditioning is seldom used. The same logic applies to heating. If the heat is used only on especially cold days during the three or so months of winter, then filters would be checked less often.


How much water does humidifier use?

Depending on the product you choose and the size of your home, a humidifier may use from 1.5 to 12 gallons per day when the furnace is operating. The amount of water used is enough to raise the humidity to your desired level, but not enough to notice a difference on your water bill.


Can Idor Air be dangerous to your health?

Absolutely. Exposure to air pollutants can be up to 100 times higher indoors than outdoors. The American Lung Association estimates that most people spend 90 percent of their time indoors, making indoor air quality (IAQ) a critical component of home comfort. Many common household items contribute to poor indoor air quality. Compounds found in carpeting, furniture, upholstery and drapery fabric constantly emit fumes. Other sources of pollutants can include cleaning agents, paints and personal care products. The tight construction of today’s homes also contributes significantly to poor IAQ. Things like weather stripping and storm doors are designed to save on energy costs. However, they also prevent proper ventilation by keeping indoor air in and outdoor air out. The result can be a buildup of contaminants within the home.

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HVAC green by design is also committed to viewing your home or businesses’ mechanical components as a system that must work together for maximum efficiency. We take an approach to system design that ensures each component is carefully balanced to provide the results you want at a price you can afford. Contact us today for an estimate.


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