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Right – The double compressor unit supplies multiple interior minisplit heat pump heads.

Right – The double compressor unit supplies multiple interior minisplit heat pump heads.
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Right – The ductless minisplit in this open area is installed in the ceiling rather than on a wall.

Right – The ductless minisplit in this open area is installed in the ceiling rather than on a wall.
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Right (decent): For a relatively high-capacity ccASHP sized per Approach 3 or 4 to meet nearly 100% of the heating load, this heat pump’s modulating zone has a decent overlap with the home’s heating load line, reducing short-cycling.

Right (decent): For a relatively high-capacity ccASHP sized per Approach 3 or 4 to meet nearly 100% of the heating load, this heat pump’s modulating zone has a decent overlap with the home’s heating load line, reducing short-cycling.
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Right: Sized per Approach 1, this heat pump will have minimal short-cycling; since sized using Approach 1, it will require backup heat when temp is below 30°F but could still contribute significant heating down to heating design temp (-6°F) and lower

Right: Sized per Approach 1, this heat pump will have minimal short-cycling; since sized using Approach 1, it will require backup heat when temp is below 30°F but could still contribute significant heating down to heating design temp (-6°F) and lower
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Right: Sized per Approach 3 or 4, this heat pump’s modulating zone has a large overlap with the home’s heating load line, resulting in minimal short-cycling; the unit may require a small amount of backup heat during the very coldest hours of winter.

Right: Sized per Approach 3 or 4, this heat pump’s modulating zone has a large overlap with the home’s heating load line, resulting in minimal short-cycling; the unit may require a small amount of backup heat during the very coldest hours of winter.
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Right: Sized per Approach 3, this heat pump’s modulating zone has a large overlap with the home’s heating load line; it will require backup heating but could still contribute significant heating for all hours of the heating season

Right: Sized per Approach 3, this heat pump’s modulating zone has a large overlap with the home’s heating load line; it will require backup heating but could still contribute significant heating for all hours of the heating season
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Shade trees planted on the east or west sides of a house are one of the most effective measures that can be taken to reduce heat gains

Shade trees planted on the east or west sides of a house are one of the most effective measures that can be taken to reduce heat gains
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Small Consumer-type Generator

A smaller consumer-type generator that uses gasoline and propane engines. Use of this type of generator is not restricted by CARB.
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Snow and ice buildup over doorways can be a source of injury for occupants.

Snow and ice buildup over doorways can be a source of injury for occupants.
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Sources of heat gain in a house include solar gains, infiltration, conduction through walls and roof, occupants, and internal equipment

Sources of heat gain in a house include solar gains, infiltration, conduction through walls and roof, occupants, and internal equipment
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Sources of heat gain in a house include solar gains, infiltration, conduction through walls and roof, occupants, and internal equipment

Sources of heat gain in a house include solar gains, infiltration, conduction through walls and roof, occupants, and internal equipment
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Split-system air source heat pump

Split-system air source heat pump
Video:

Stabilizing Houses on Permafrost

Case Study:

Technology Solutions Case Study: Advanced Controls Improve Performance of Combination Space and Water Heating Systems, Minneapolis, Minnesota

Case Study:

Technology Solutions Case Study: Advanced Controls Improve Performance of Combination Space- and Water-Heating Systems

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Technology Solutions Case Study: Combustion Safety Simplified Test Protocol

Case Study:

Technology Solutions Case Study: Field Performance of Inverter-Driven Heat Pumps in Cold Climates

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Technology Solutions Case Study: Hydronic Systems: Designing for Setback Operation

Case Study:

Technology Solutions Case Study: Long-Term Monitoring of Mini-Split Ductless Heat Pumps in the Northeast, Devens and Easthampton, Massachusetts

Case Study:

Technology Solutions Case Study: Low-Load Space-Conditioning Needs Assessment

Case Study:

Technology Solutions Case Study: Replacing Resistance Heating with Mini-Split Heat Pumps

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The addition of low-E permanent exterior storm windows is typically accepted for most historic preservation projects

The addition of low-E permanent exterior storm windows is typically accepted for most historic preservation projects
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The Attachments Energy Rating Council (AERC) uses this label to indicate certified low-E storm window products.

The Attachments Energy Rating Council (AERC) uses this label to indicate certified low-E storm window products.
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The ductless air handler of a ductless heat pump can be mounted above the ceiling so that only the register is visible

The ductless air handler of a ductless heat pump can be mounted above the ceiling so that only the register is visible