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Ventilation

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    Venting Gas Appliances

    Supply plenty of combustion air, keep the flue warm and dry, and don't restrict the flow of exhaust in the flue.

     
  • Products

    Compact excavators, hole saws with stamina, an easy-open utility knife, acrylic block windows, a drywall suspension system for domes, high-capacity toolbags, PVC railings, more

     
  • Q&A: Condensation on Windows

    Q. A customer with insulated-glass windows has a problem with excessive condensation on the interior of the windows. Can you please list the most important causes of high humidity in a home? A. Energy and sustainable

     
  • Q&A: Sizing a Range Hood Fan

    Q: How do I size the exhaust fan for a range hood above a gas cooktop?

     
  • Q&A: Right Size for an Insulating Air Space

    Q: How big does an air space need to be before it stops working as insulation and starts working as a convective loop?

     
  • Q&A: Makeup Air for an Exhaust-Only Ventilation System

    Q: Q. I’m building a tight house with above-average attention to air sealing, and I plan to ventilate with a Panasonic exhaust fan running continuously. Will the cracks around windows and doors admit adequate makeup air, or do I need to provide wall vents

     
  • Kitchen & Bath: Venting Professional-Style Kitchen Ranges

    Venting professional-style kitchen ranges

     
  • Q&A: Asphalt Shingles on Unvented Roofs

    Q: Our insulation subcontractor advises us to install dense-pack cellulose in the rafter bays over a cathedral ceiling, without ventilation baffles, and the local building inspector approves. If we don’t ventilate under the roof sheathing, what happens to

     
  • Q&A: Powered Attic Ventilation

    Q: I am trying to plan the best way to ventilate a hipped roof above an attic. Since the ridge is very short, ridge venting is not an option. I was planning to install powered exhaust ventilation. How should I size the fan?

     
  • Q&A: Attic Ventilation Details

    Q: I am improving the attic ventilation in a 30-year-old two-story house in Virginia. My plan is to install soffit vents and insulation baffles. The attic has gable vents with thermostatically controlled fans. Do I have to install a ridge vent, or are the

     
  • Products

    Ready-made business forms; ventilating fan for toilet bowl; generator wheel kit; rack for production door painting; hot wheelbarrow add-ons; more

     
  • Q&A: Makeup Air for Fireplaces and Exhaust Fans

    Q: In a house I am building, I need to provide adequate makeup air for a fireplace and a 600-cfm cooktop exhaust fan. How do I size a passive duct to introduce exterior makeup air into the house?

     
  • Choosing a Whole-House Ventilation System

    Homeowners and code officials are beginning to insist on better mechanical ventilation systems. A ventilation expert helps you choose the best system for your climate.

     
  • Kitchen & Bath: Effective Bathroom Ventilation

    Sizing a bathroom vent fan

     
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    Designing Better Kitchens

    Many common kitchen design elements are inefficient or downright dangerous. These guidelines from a kitchen specialist will help you create kitchens that not only look great and work well, but are safe to use.

     
  • K&B Problem-Solvers

    This selection of products will help you design, install, and customize functional, attractive kitchens and bathrooms.

     
  • Crawlspace Ventilation Update

    Most crawlspaces should be carefully sealed, not ventilated. In many areas, however, the codes are still catching up with best practice.

     
  • Notebook

    Coping with the labor shortage, water heater failures, higher fly ash content in concrete, new home ventilation standard

     
  • Plumbing Venting Explained

    Ever wonder why the plumber insists on notching and boring the framing to run all those vent lines up through the house? A master plumber explains the whys and wherefores of venting rules, and tells how he goes beyond code minimums to avoid callbacks.

     
  • Q&A: Carpet Filtration Mystery

    Q: We are builders in the Philadelphia area. Over the past few years, we’ve experienced several cases of what we’ve been told is "carpet filtration" — dark ghost lines that appear on the carpet under doors and around the perimeter of rooms. We tested the hvac system and found a sizeable imbalance...