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4310 4th St NE

Completed Project

4310 4th


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House Specs Here...             

Homes use 40-50% of their energy on space heating and cooling.  Early choices in the design have an enormous impact on energy use for the long term. 


Load calculations means higher comfort and lower energy use


Bigger is NOT better when it comes to HVAC systems.  Many contractors rely on “Rules of thumb” to size a HVAC system.  This leads to grossly oversized systems that use more energy than is necessary and provide poor comfort in a home due to short cycling.


There is a proper way to size a HVAC system.  The contractor performs a special energy model that calculates the heating and cooling load.  It’s called a Manual J.  Most contractors either do not perform a Manual J, (instead relying on rules of thumb) or they do the Manual J grossly wrong.

  • True Turtle always performs a Manual J. 

  • In fact…our Manual J is quality checked by our LEED rater to assure it’s done right. 

More specs   


Energy saving layout design


Handler location

  • ​The air handler is inside the envelope...many times it is in the attic or garage where it loses heating and cooling to extreme temperatures.​​

  • Centrally located so that duct runs are short and straight.  Every bend means you lose 25% of the air flow due to turbulence.   We specifically locate a handler to minimize bends.                 


Energy saving duct layout design

  • All ducts are inside the envelope…many times contractors locate ducts in exterior walls or even worse in attics or crawlspaces where they lose heating and cooling to the extreme temperatures and leakage. 

  • No flex duct unless required by code.  Flex duct is not smooth on the inside and air flow is lost.  Many contractors will duct an entire home with flex duct, resulting in uncomfortable rooms and an octopus in your basement or attic. 

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