Skip to main content

- What is Passive Building?
  Your passive building questions, answered
  
  Passive Building
  
  Passive Building Principles
  
  Passive Building FAQs
  
  A Better Way to Zero
  
  Passive Building Foundations Training
- Sectors
  Passive isn't just for houses
  
  Single-Family
  
  Multifamily
  
  Office Buildings
  
  Schools
  
  Other Non-Residential
- Projects
  Phius Certified Projects are the most energy efficient and comfortable buildings in the world
  Find a Project
  
  Project Certification
  
  Submit a Project
  
  Certification Review Queue
- Products
  Phius Certified Products are guaranteed to perform to passive standards
  View Products
  
  Product Certification Overview
  
  Window Certification
  
  Panel Certification
- Professionals
  Phius Certified Professionals are on the cutting edge of high-performance building
  Find a Professional
  
  Phius Certified Consultant (CPHC®)
  
  Phius Certified Builder (CPHB)
  
  Phius Certified Rater
  
  Phius Certified Verifier
  
  Phius Certified Trades Professional
  
  Phius Associate
  
  Maintain Credentials
Our Approach
- New Construction
  Phius CORE and Phius ZERO provide the path for constructing a Phius building from the ground up.
- Retrofit
  Upgrade existing buildings to Phius standards using Phius CORE REVIVE and Phius ZERO REVIVE.
- Commercial
  Phius standards aren't just for residential buildings. Phius CORE COMM and Phius ZERO COMM can be applied to any non-residential building.
Categories
February 4 – 5

Phius Certified Verifier Training | February 2026 | Boston, MA
Take advantage of the Massachusetts passive building boom!
Upcoming Sessions
- Phius Certified Verifier Training | February 2026 | Boston, MA
  February 4 – 5
- Phius Project Certification Workshop | February 2026
  February 4
- Feb. Webinar: QAP 101
  February 10
- WUFI Passive Single Family | February 2026
  February 11 – 18
- Policy Work
  Promoting policies designed to grow passive building
  Policy Database
  
  Financial Incentives
  
  Codes
  
  Qualified Allocation Plans
  
  Cost Data
- Tools and Support
  Providing the tools you need to create healthier buildings
  Resource Library
  
  Certification Support
  
  Calculators and Protocols
  
  Feasibility Study
  
  METr Design Tool
  
  WUFI Passive Design Tool
  
  Climate Data
  
  Quality Assurance
  
  Tech Corner

Project 2747

Tahitian Village Passive

Heliode Architecture and Consulting

Bastrop, Texas

Building Function

Single-Family
Project Type

New Construction
ASHRAE Climate Zone

2A - Hot - Humid
Status

Certified
INT. Conditioned Floor Area

1700 ft²

Core Project Team

Builder

Alesandra Di Lorenzo
Phius CPHB

Scott True
Phius Certified Rater

Roger Taylor
Phius CPHC (Lead)

Kevin Witt
Project Submitter

Kevin Witt

Project Information

- Developer
  
  Dimora Homes
- Architecture Planning
  
  Heliode Architecture and Consulting
- Building Owner
  
  Dimora Homes
- Mechanical Systems Designer
  
  Building Performance Workshop LLC
- Construction Company
  
  Dimora Homes
- Building Function
  
  Single-Family
- Project Type
  
  New Construction
- Number of Units
  
  1
- Number of Stories
  
  2
- Program Version
  
  Phius CORE 2024
- All Electric
  
  Yes
- INT. Conditioned Floor Area
  
  1700 ft²
- Status
  
  Certified
- Design Certification
  
  November 26, 2025
- Final Certification
  
  January 14, 2026
- ASHRAE Climate Zone
  
  2A - Hot - Humid
- Region
  
  South Central

Performance

- Annual Heating Demand
  
  3.29 kBTU/ft².yr
- Annual Cooling Demand
  
  13.15 kBTU/ft².yr
- Peak Heating Load
  
  5.44 kBTU/ft².yr
- Peak Cooling Load
  
  3.81 kBTU/ft².yr
- Site Energy Use Index (EUI)
  
  17.4 kBTU/ft².yr
- Compliance Software
  
  WUFI Passive
- Source Energy (Residential)
  
  3468 kWh/person.yr
- HERS Rating
  
  35

Enclosure

- Window Manufacturer 1
  
  Reliabilt

Systems & Equipment

- Ventilation System Manufacturer
  
  Broan
- Measured Ventilation Fan Efficiency
  
  0.54 W/cfm
- Heating System Manufacturer
  
  Mitsubishi
- Cooling System Manufacturer
  
  Mitsubishi
- Hot Water System Manufacturer
  
  Rheem