I’ve heard about the option of using Argon gas to boost energy efficiency. – Should I spend more to get the Argon gas?
The repair of a fogged double paned window (or IGU–insulated glass unit)can be further enhanced by adding Low-E coatings and filling the space between the lites with a noble gas such as Argon.
Argon is denser than air and reduces the amount of heat transfer through the IGU.
When 90 percent Argon gas-fill is used in a low-e IGU instead of air, the window’s insulating value can be improved by “up to” only 16 percent.
Argon gas is relatively cheap, but it can result in a slower cycle times in fabrication and add to increased production costs.
It is generally not a good investment to reppair fogged IGU’s with Argon just for energy-efficiency purposes.
Argon only typically increases the insulating R-value of a window by only half a point. (R-value is the measurement of thermal resistance; the higher the number, the more efficient the window.)
The small increase in insulating value from Argon will get you slight energy savings at a high purchase cost.
Argon does little or nothing to reduce transmission of ultraviolet and infrared radiation. (UV light from the sun can damage furnishings more important, infrared radiation transfers heat into or out of a home.)
Argon filled IGU’s have a risk of gas leakage. The partial pressure differentials between the air outside and the Argon inside cause it to naturally escape the IGU.
As Argon leaks out, the IGU loses insulating performance, and, since air doesn’t backfill into the IGU, the two lites of glass begin to collapse into the center of the unit, which can cause the glass to look distorted or even break.
Large incremental costs for Argon filled IGU’s generally outweigh their benefit.
At the end of the day it’s the customer’s choice if he/she wants to pay more for Argon filled IGU’s