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2. So, You Have a Water Stain on Your Ceiling—Here's What a ...

   www.aol.com/water-stain-ceiling-heres-plumber...

   Snow melting and heavy rain can lead to roof leaks, while HVAC-related leaks typically happen in spring and summer when people actively use their air conditioners, Russum says. Pipe leaks can ...

3. Infiltration (HVAC) - Wikipedia

   en.wikipedia.org/wiki/Infiltration_(HVAC)

   In cold climates, with a 15 MPH wind, residences often have air exchange rates of 1.0 to 1.5 ACHs, far in excess of the ventilation air needs and are thus called loose construction. It is very easy to reduce infiltration rates to less than 1.0 ACH. Smoke candles and blower-door tests can help identify less-than-obvious leaks.

4. Leak detection - Wikipedia

   en.wikipedia.org/wiki/Leak_detection

   Two independent LDS for continuous leak detection during steady-state operation. One of these systems or an additional one must also be able to detect leaks during transient operation, e.g. during start-up of the pipeline; One LDS for leak detection during shut-in operation; One LDS for creeping leaks; One LDS for fast leak location

5. Duct leakage testing - Wikipedia

   en.wikipedia.org/wiki/Duct_leakage_testing

   A duct leakage tester is a diagnostic tool designed to measure the airtightness of forced air heating, ventilating and air-conditioning (HVAC) ductwork. A duct leakage tester consists of a calibrated fan for measuring an air flow rate and a pressure sensing device to measure the pressure created by the fan flow.

6. Air conditioning - Wikipedia

   en.wikipedia.org/wiki/Air_conditioning

   Air conditioning, often abbreviated as A/C (US) or air con (UK), [1] is the process of removing heat from an enclosed space to achieve a more comfortable interior temperature (sometimes referred to as 'comfort cooling') and in some cases also strictly controlling the humidity of internal air.

7. These Wake schools ‘need attention.’ They’re in $530 million ...

   www.aol.com/wake-schools-attention-530-million...

   Due to a lack of heating and air conditioning, the restroom building can also become a slipping hazard. ... Discoloration from leaks is visible on the walls of the gymnasium at Brentwood ...