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HVAC refrigerant rules changed in 2025 and homeowners are still getting bad advice from installers

Federal rules that took effect in 2025 quietly rewired how new home air conditioners and heat pumps are built, yet many ...
IEEE

Convolutional Neural Networks for Electrical Endurance Prediction of Alternating Current Contactors

Abstract: This article proposes a deep-learning-based approach that predicts electrical endurance of alternating current (ac) contactors by using measured electric waveforms. We execute AC-4 tests and ...
IEEE

Investigation of the degradation process and failure mechanisms of AC contactor in the electrical endurance experiment

Abstract: The longer electrical lifetime and higher reliability of AC contactors are forever demanded for industrial customers. It is known the occurred failure events of contactors are mainly caused ...
thecooldown

Homeowner furious after unreasonable HOA prevents AC installation during heat wave: 'I have two dogs trying not to die'

One homeowner in a heat wave was appalled when their homeowners association refused to let them replace a broken air conditioner. They posted about their predicament in an anti-HOA subreddit. "HVAC ...