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Wrong – A clothes dryer that vents to the crawlspace can contribute moisture to the crawlspace; this can result in damp, molding, and rotting insulation

Wrong – A clothes dryer that vents to the crawlspace can contribute moisture to the crawlspace; this can result in damp, molding, and rotting insulation
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Wrong – Overly powerful kitchen exhaust fans can backdraft other combustion appliances in the home

Wrong – Overly powerful kitchen exhaust fans can backdraft other combustion appliances in the home
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Wrong – Refrigerator was not properly secured to the wall studs of the home.

Wrong – Refrigerator was not properly secured to the wall studs of the home.
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Wrong – Seams in the furnace-to-AC connection at the air handler are not sealed.

Wrong – Seams in the furnace-to-AC connection at the air handler are not sealed.
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Wrong – the exhaust terminal for a clothes dryer should not be covered with a screen which could trap lint; instead, cover it with a hooded, louvered damper

Wrong – the exhaust terminal for a clothes dryer should not be covered with a screen which could trap lint; instead, cover it with a hooded, louvered damper
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Wrong – Two combustion appliances are sharing a flue which could lead to backdrafting if one appliance is updated to a direct vent appliance and disconnected from shared chimney.

Wrong – Two combustion appliances are sharing a flue which could lead to backdrafting if one appliance is updated to a direct vent appliance and disconnected from shared chimney.
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Wrong –Excessive length and a vertical angle on this dryer duct reduced air flow allowing the dryer duct to become completely clogged with dryer lint

Wrong –Excessive length and a vertical angle on this dryer duct reduced air flow allowing the dryer duct to become completely clogged with dryer lint
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Wrong: HPWH inlet and outlet are piped to mixing valve inlet and DCW make up, driving erratic HPWH and mixing valve behavior

Wrong: HPWH inlet and outlet are piped to mixing valve inlet and DCW make up, driving erratic HPWH and mixing valve behavior
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Wrong: Not enough space was left in the floorplans for both the heat pump water heater and a duct elbow to be attached to the right side of the water heater (the orange circle outlines the tank; the rectangle shows the space needed for the duct)

Wrong: Not enough space was left in the floorplans for both the heat pump water heater and a duct elbow to be attached to the right side of the water heater (the orange circle outlines the tank; the rectangle shows the space needed for the duct)
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Wrong: Sized per Approach 1 or 2, this heat pump’s modulating zone has a small overlap with the home’s heating load line, resulting in a large amount of short-cycling; the unit will require backup heat when the temperature is below 25°F

Wrong: Sized per Approach 1 or 2, this heat pump’s modulating zone has a small overlap with the home’s heating load line, resulting in a large amount of short-cycling; the unit will require backup heat when the temperature is below 25°F
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Wrong: Sized per Approach 3, there is minimal overlap between this heat pump’s modulating zone and the home’s heating load line, causing excessive short-cycling; it will require backup heat and may not contribute significantly at temperatures below 5°F

Wrong: Sized per Approach 3, there is minimal overlap between this heat pump’s modulating zone and the home’s heating load line, causing excessive short-cycling; it will require backup heat and may not contribute significantly at temperatures below 5°F
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Wrong: Sized per Approach 3, there is small overlap between this heat pump’s modulating zone and the home’s heating load line, resulting in excessive short-cycling; it will require backup heat when the temperature is below 5°F

Wrong: Sized per Approach 3, there is small overlap between this heat pump’s modulating zone and the home’s heating load line, resulting in excessive short-cycling; it will require backup heat when the temperature is below 5°F
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Wrong: The exhaust air from one heat pump water heater is blowing into the intake of the heat pump water heater next to it

Wrong: The exhaust air from one heat pump water heater is blowing into the intake of the heat pump water heater next to it
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Wrong: This heat pump is oversized even for Approach 4, and its modulating zone has a small overlap with the home’s heating load line, resulting in a large amount of short-cycling.

Wrong: This heat pump is oversized even for Approach 4, and its modulating zone has a small overlap with the home’s heating load line, resulting in a large amount of short-cycling.
Video:

Your Northern Home: Small Space Heater Maintenance