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During drought periods, an integrated back-up system adds city water to maintain the Durable Energy home’s 11,500-gallon cistern at 25% capacity or more.

During drought periods, an integrated back-up system adds city water to maintain the Durable Energy home’s 11,500-gallon cistern at 25% capacity or more.
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Each unit in a multifamily building should have its own supply and exhaust ventilation

Each unit in a multifamily building should have its own supply and exhaust ventilation
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Earth tubes buried in the ground can provide pre-cooling of ventilation air or primary cooling if designed deep and long enough

Earth tubes buried in the ground can provide pre-cooling of ventilation air or primary cooling if designed deep and long enough
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ECM Motor and Control

ECM Motor and Control
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ECM Motor Retrofit

ECM Motor Retrofit
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Efficient Hot Water Distribution Part 1: What’s at Stake

Efficient Hot Water Distribution Part 1: What’s at Stake
Presentation:

Efficient Hot Water Distribution Part 2: How to Get it Right

Efficient Hot Water Distribution Part 2: How to Get it Right
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Efficient showerheads can save 2,900 gallons of water per year.

Efficient showerheads can save 2,900 gallons of water per year.
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Ensure that attached garages in multifamily buildings are well-ventilated to reduce the presence of airborne contaminants in the garage and occupied space

Ensure that attached garages in multifamily buildings are well-ventilated to reduce the presence of airborne contaminants in the garage and occupied space
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Even when wind is blowing parallel to a wall, an open casement window can create a zone of higher pressure near the window opening, driving airflow into the house

Even when wind is blowing parallel to a wall, an open casement window can create a zone of higher pressure near the window opening, driving airflow into the house
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Example calculation of the leakage allowance for a duct leakage test at final for a ventilation system in a multifamily building

Example calculation of the leakage allowance for a duct leakage test at final for a ventilation system in a multifamily building
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Example calculation of the leakage allowance for a duct leakage test at rough-in for a ventilation system in a multifamily building

Example calculation of the leakage allowance for a duct leakage test at rough-in for a ventilation system in a multifamily building
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Example calculations for converting measured leakage airflow and leakage allowance when measured at a pressure other than the design or operating pressure

Example calculations for converting measured leakage airflow and leakage allowance when measured at a pressure other than the design or operating pressure
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Example calculations for converting total airflow and leakage allowance when measured at 50 Pa instead of the design or operating pressure

Example calculations for converting total airflow and leakage allowance when measured at 50 Pa instead of the design or operating pressure
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Example calculations for leakage allowance when testing only a portion of the ducts in a central exhaust system

Example calculations for leakage allowance when testing only a portion of the ducts in a central exhaust system
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Example design airflow data for a ventilation system in a multifamily building

Example design airflow data for a ventilation system in a multifamily building
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Example design airflow data for the supply and exhaust registers of a ventilation system in a multifamily building

Example design airflow data for the supply and exhaust registers of a ventilation system in a multifamily building
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Example duct length calculations for a multifamily central exhaust system

Example duct length calculations for a multifamily central exhaust system
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Example of an HVAC air filter slot with a latch cover door.

Example of an HVAC air filter slot with a latch cover door.
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Example of an HVAC air filter slot with a sliding cover door.

Example of an HVAC air filter slot with a sliding cover door.
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Examples of heat pump water heaters with water pipe connections on top.

Examples of heat pump water heaters with water pipe connections on top.
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Examples of whole-house and local ventilation systems

Examples of whole-house and local ventilation systems
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Exhaust duct is well supported by framing and support straps

Exhaust duct is well supported by framing and support straps
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Exhaust fan installed but in wrong direction causing excessive bend and duct is uninsulated

Exhaust fan installed but in wrong direction causing excessive bend and duct is uninsulated