As Irish homes become better insulated, having appropriate heating and ventilation systems has never been more important ...

Dear Jim: I have an energy-efficient house that is fairly airtight. I installed new windows and doors. Now the indoor air does not seem as fresh as it used to and odors linger. How can I get more ...

For industrial and commercial facilities, simultaneous heating and cooling needs across a building, or even a single floor, bring challenges to both near-term energy management and long-term ...

Dear Jim: I have an energy efficient house which is fairly airtight. I installed new windows and doors. Now the indoor air does not seem as fresh as it used to and odors linger. How can I get more ...

Q: I have caulked and weatherstripped to make my house more airtight, but the air seems stale. What are some efficient methods to bring in more fresh outdoor air? A: Making your house more airtight ...

Dear Jim: The indoor air gets stale and too dry or too humid during winter and summer when we heat or air-condition. Is there any efficient way to get fresh air indoors without opening windows and ...

Dear Jim: The indoor air gets stale and too dry or too humid during winter and summer when we heat or air-condition. Is there any efficient way to get fresh air indoors without opening windows and ...

Dear Jim: I have an energy-efficient house that is fairly airtight. I installed new windows and doors. Now the indoor air does not seem as fresh as it used to and odors linger. How can I get more ...

Geothermal heat exchangers almost always use condenser water or glycol as the heat transfer medium — and, sometimes, refrigerant. Wastewater heat recovery systems typically preheat domestic cold water ...