The article linked to photo (click on photo) from the Washington Post says studies show dust in ducts usually stays there and does not noticeably affect HVAC...

Whenever you move into a new place I recommend you replace the dryer vent pipe. It is supposed to be cleaned every six months but people rarely do. I often...

This switch senses humidity and turns on the bathroom fan automatically! Good for basement and top floor bathrooms. If moisture doesn't make it up to the a...

Just did my second house with a fuel oil leak. Felt loopy after just about 20 minutes in the utility room. If the leak went through the concrete and or int...

The current solution to preventing mold in attics is very low tech: vents along the soffits and a ridge vent. Here's what soffit vents look like: Images o...

Give up on those ugly, plastic dryer vents, that clog easily and rats can chew through (Yes it happened to me... rats died in bathroom wall and maggots poure...

Is your condo in DC more than 50 years old? Mold in your bathroom? Many old buildings don't want to start cutting holes in the outside wall for better venti...

Good air, good light: really makes a difference. These are vent ducts leading up from the two bathroom fans in the upper floor bathrooms. One of the fans a...

Click on image for link. Click on image for link. #roof #ventilation

Just inspected a new condo in DC. Really modern and bright. However, they had installed a draft hood that fit between the cabinet framing. This meant that...

Ideally there should be continuous soffit vents and a continuous ridge vent in your attic to allow for a passive air flow over the inside of your roof deck w...

This beautiful room doesn't have a conventional attic space. It may still be vented from the eaves to ridge as required in R806.3 of the International Resid...

Ha! That title reminds me of the new grammar I learned while I was a peace Corps Volunteer in the Philippines. Interestingly the dialect had an inclusive and...

So, elsewhere on these blogs I suggest using washable filters in your HVAC system to save money on filters and improve airflow. To effectively remove allerg...

Actually for the same reasons we do. We breathe, or respire, so our cells can get oxygen to break down glucose, a complex hydrocarbon, through cellular resp...

There are several important layers of function in these things: the cells, prefilter and charcoal filters, for example. Also they require the fan to be runn...

Some of the new houses are too airtight! Most houses are stale at certain times of the year. Some need better ventilation for safety issues. This system c...

​Putting that dehumidifier in the basement will use a lot of electricty and only remove the water from the air, not mold spores, dander, dust and dirty sock ...

Heat rises, cold air sinks, so partially close some vents on the lower floors during the summer and partially close some upper floor ones if it's too hot ups...