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Typical coaxial coil (liquid-to-refrigerant heat exchanger) used in a ground-source heat pump

Typical coaxial coil (liquid-to-refrigerant heat exchanger) used in a ground-source heat pump
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Typical ground-source plumbed system

Typical ground-source plumbed system
Video:

University of Minnesota-NorthernSTAR: A Natural Gas-Fired Combi System for Space Heating and Hot Water

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Use only Underwriters Laboratory UL-181 approved tape

Use only Underwriters Laboratory UL-181 approved tape
Presentation:

Variable Capacity Comfort Systems and Smart Ventilation Systems in High-Performance Homes

Variable Capacity Comfort Systems and Smart Ventilation Systems in High-Performance Homes
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Vented Attic vs Unvented Cathedral Attic Air Flow

Vented Attic vs Unvented Cathedral Attic Air Flow
Case Study:

Veridian Homes: Cold Climate Region 40+% Energy Savings

Presentation:

What is a High Performance Home and How to Consistently Deliver It at Lower Cost

What is a High Performance Home and How to Consistently Deliver It at Lower Cost
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When architects and builders think of the house as a systems, all of the parts are designed to work together for a healthy, durable home that minimizes builder callbacks while cutting energy, maintenance, and repair costs down the road.

When architects and builders think of the house as a systems, all of the parts are designed to work together for a healthy, durable home that minimizes builder callbacks while cutting energy, maintenance, and repair costs down the road.
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When HVAC systems are installed in enclosed garages, it is preferable that the equipment is located within an air-sealed room that is connected to the conditioned space.

When HVAC systems are installed in enclosed garages, it is preferable that the equipment is located within an air-sealed room that is connected to the conditioned space.
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When wrapping metal ducts with insulation allow two inches of overlap and staple along the seam with outward clinching staples

When wrapping metal ducts with insulation allow two inches of overlap and staple along the seam with outward clinching staples
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Whole house ventilation ensures adequate indoor air quality

Whole house ventilation ensures adequate indoor air quality
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Wrong - ERV heat exchange coils have not been cleaned and have become completely clogged with dirt.

Wrong - ERV heat exchange coils have not been cleaned and have become completely clogged with dirt.
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Wrong – This ductless mini-split heat pump was installed above an exterior door allowing conditioned air to escape when the door is opened, heat transfer through the door, and temperature fluctuations that could impact the unit’s thermostat.

Wrong – This ductless mini-split heat pump was installed above an exterior door allowing conditioned air to escape when the door is opened, heat transfer through the door, and temperature fluctuations that could impact the unit’s thermostat.
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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: 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 door and filter were removed, allowing unfiltered air to enter the air handler leading to premature failure of the system due to dirt accumulation.

Wrong: The door and filter were removed, allowing unfiltered air to enter the air handler leading to premature failure of the system due to dirt accumulation.
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Wrong: This air handling equipment is installed in the garage without isolating the equipment from the garage space

Wrong: This air handling equipment is installed in the garage without isolating the equipment from the garage space
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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.