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Anode bars can protect boiler steel without the bad effects of chemical water treatment

Anode bars can protect boiler steel without the bad effects of chemical water treatment
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Assembled section of fiber board duct

Assembled section of fiber board duct
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At the outlet of the dryer exhaust duct, install a hooded vent with a louvered damper

At the outlet of the dryer exhaust duct, install a hooded vent with a louvered damper
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Average wet-bulb temperatures across the United States

Average wet-bulb temperatures across the United States
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Back-draft damper still has a piece of tape that prevented it from rattling during shipping

Back-draft damper still has a piece of tape that prevented it from rattling during shipping
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Baffles are installed to protect airflow from the soffits to the ridge vents before the ceiling drywall and attic insulation are installed.

Baffles are installed to protect airflow from the soffits to the ridge vents before the ceiling drywall and attic insulation are installed.
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Balanced ventilation dominates ventilation specifications by Zero Energy Ready Home builders

Balanced ventilation dominates ventilation specifications by Zero Energy Ready Home builders
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Balanced ventilation strategy for conditioned attic spaces

Balanced ventilation strategy for conditioned attic spaces
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Bathrooms should be equipped with an exhaust fan that vents directly outdoors

Bathrooms should be equipped with an exhaust fan that vents directly outdoors
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Because flue temperatures are cool, intake and exhaust ducts on a Category 4 direct-vent sealed-combustion condensing furnace can be made of PVC

Because flue temperatures are cool, intake and exhaust ducts on a Category 4 direct-vent sealed-combustion condensing furnace can be made of PVC
Case Study:

Bedford Farmhouse High Performance Retrofit Prototype

Bedford Farmhouse High Performance Retrofit Prototype
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Bedrooms pressure-balanced and provide 1 sq. in. of free area opening per 1 CFM of supply air or achieve a Rater-measured pressure differential ≤ 3 Pa

Bedrooms pressure-balanced and provide 1 sq. in. of free area opening per 1 CFM of supply air or achieve a Rater-measured pressure differential ≤ 3 Pa
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Bedrooms pressure-balanced and provide 1 sq. in. of free area opening per 1 CFM of supply air or achieve a Rater-measured pressure differential ≤ 3 Pa

Bedrooms pressure-balanced and provide 1 sq. in. of free area opening per 1 CFM of supply air or achieve a Rater-measured pressure differential ≤ 3 Pa
Case Study:

Best Practices Case Study: S&A Homes, East Liberty, PIttsburgh, PA

Best Practices Case Study: S&A Homes, East Liberty, PIttsburgh, PA
Case Study:

Best Practices Case Study: Shaw Construction Burlingame Ranch Ph.1, Aspen, CO

Best Practices Case Study: Shaw Construction Burlingame Ranch Ph.1, Aspen, CO
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Block off registers before installing spray sealant in HVAC ducts

Block off registers before installing spray sealant in HVAC ducts
Case Study:

Blue Sea Construction: Affordable Housing Case Study

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Boilers can provide zoned heating with parallel piping loops

Boilers can provide zoned heating with parallel piping loops
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Boot has been covered with insulation and sealed with mastic

Boot has been covered with insulation and sealed with mastic
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Boot is uninsulated

Boot is uninsulated
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Boot to drywall connection not sealed

Boot to drywall connection not sealed
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Boot to drywall connection sealed

Boot to drywall connection sealed
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Boot to floor connection not sealed

Boot to floor connection not sealed
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Boot to floor connection sealed

Boot to floor connection sealed