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Collars that are specifically made for flexible duct have a raised bead to prevent the duct from slipping off

Collars that are specifically made for flexible duct have a raised bead to prevent the duct from slipping off
Case Study:

Colleyville Eco House Prototype

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Combined space and water heating system with tankless gas water heater

Combined space and water heating system with tankless gas water heater
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Common methods for plywood shutter attachment to wood-frame and masonry walls.

Common methods for plywood shutter attachment to wood-frame and masonry walls.
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Common window water infiltration pathways

Common window water infiltration pathways
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Comparison of three homes showing the amount of wall insulation needed to achieve a whole-wall insulation value of R-19 when the wall has double- versus triple-pane windows

Comparison of three homes showing the amount of wall insulation needed to achieve a whole-wall insulation value of R-19 when the wall has double- versus triple-pane windows.
Video:

Complete Window and Frame Replacement

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Completed wall retrofit of masonry home (on right) showing new lap siding attached over four inches of rigid foam; windows were boxed with plywood to accommodate depth of foam plus 1x4 furring strips

Completed wall retrofit of masonry home (on right) showing new lap siding attached over four inches of rigid foam; windows were boxed with plywood to accommodate depth of foam plus 1x4 furring strips
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Concept behind an evaporative cooler – warm air is cooled as the air passes through a wet medium and gives up some of its heat to evaporate the water

Concept behind an evaporative cooler – warm air is cooled as the air passes through a wet medium and gives up some of its heat to evaporate the water
CAD File:

Conceptual stack framing drawing

Preview Image
Conceptual stack framing drawing
Case Study:

Concord Cape Prototype

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Concrete slab pan flashing for doors

Concrete slab pan flashing for doors
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Condensate from this heat pump water heater is routed to a nearby floor drain, shared with the condensate lines from a condensing gas furnace and an air conditioning coil

Condensate from this heat pump water heater is routed to a nearby floor drain, shared with the condensate lines from a condensing gas furnace and an air conditioning coil
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Condensation can form between the interior removable storm window and the existing window if the storm window is not air tight

Condensation can form between the interior removable storm window and the existing window if the storm window is not air tight
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Condensation in storm windows can be prevented by air sealing around the storm window and allowing some ventilation to the outside from the original window

Condensation in storm windows can be prevented by air sealing around the storm window and allowing some ventilation to the outside from the original window
CAD File:

Condensation in storm windows can be prevented by air sealing around the storm window and allowing some ventilation to the outside from the original window

Preview Image
Condensation in storm windows can be prevented by air sealing around the storm window and allowing some ventilation to the outside from the original window.
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Condensation potential for interior storm window retrofit

Condensation potential for interior storm window retrofit
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Condensing boilers have primary and secondary heat exchangers

Condensing boilers have primary and secondary heat exchangers
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Cool air flow is produced when the cooling cycle is energized (set thermostat to “cool”)

Cool air flow is produced when the cooling cycle is energized (set thermostat to “cool”)
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Cooling air temperatures that can be achieved by a direct evaporative cooler at various outdoor conditions

Cooling air temperatures that can be achieved by a direct evaporative cooler at various outdoor conditions
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Cut fiber board with a red V-groove tool and a gray shiplap tool to create mitered corners and a shiplapped edge for duct sections

Cut fiber board with a red V-groove tool and a gray shiplap tool to create mitered corners and a shiplapped edge for duct sections
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Cut I in housewrap

Cut I in housewrap
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Deep overhangs and porches provide midday shade for most of the windows on this home in Albuquerque, NM.

Deep overhangs and porches provide midday shade for most of the windows on this home in Albuquerque, NM.
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Deep overhangs and porches shade the double-paned, argon-filled, low-emissivity windows to keep out summer sun.

Deep overhangs and porches shade the double-paned, argon-filled, low-emissivity windows to keep out summer sun.