The second series of tests at 1/48th scale was focused on air exchange.

The original entrance allowed very little air exchange with the surface, he said.

Request that the air exchange system in your building be checked.

The measured air exchange rates (Table 4) support this conclusion.

Drafts near windows and doors can be evidence of air exchange.

Food isn't the only foodstuff to suffer at the hands of an air exchange.

He need not worry, his (your) home undoubtedly has sufficient air exchange.

However, cooling does not come only from air exchange.

Typical domestic outside air air exchange is once per hour.

In a well insulated home, air exchange represents 1/3 of heating cost.

This type of heat pump requires a certain air exchange rate to maintain its output power.

Air exchange systems can be actively or passively incorporated to address these problems.

That is less than the rate of air exchange prescribed for hospital tuberculosis wards.

"You lose more fluids to evaporation as the number of air exchanges increases," he said.

Elsewhere in the building, most staff benefit only from an under-floor air exchange system - and numerous open windows.

He added, "We make the assumption that the more frequent the air exchange, the better it is for not acquiring tuberculosis."

The door closed and air exchange started.

Proper duct system design and mechanical air exchange should be considered in the initial system cost.

The air exchange was all wrong.

The lining also tends to limit air exchange, limiting its use to environments with temperatures of 98 F or less.

The key component of its success is its ability to breathe, that is, to allow air exchange.

The ventilation in practically all houses built before 1975 depended on air exchange through leaky windows and doors.

In terms of energy consumption, a dehumidifer achieves the same result as outside air exchange but probably uses less energy.

So, from purely theoretical perspective, and only from the point of view of air exchange, there should be no difference.

Carbon dioxide from exhaled air can also build up to uncomfortable levels if air exchange is too low.