April 2026 Project Spotlight: Bush School - Upper School South
This edition of the Phius Project Spotlight Series highlights the Bush School - Upper School South project in Seattle, Washington.
Lync by WATTS - Aegis A CO2 Heat Pump Water Heater COP Estimator v26.1.0
Use this estimator to determine a climate-adjusted coefficient of performance (COP) for the Aegis A CO2 Heat Pump Water Heater. This estimator also includes instructions on modeling storage losses associated with water storage tanks per Lync by WATTS' available products. This estimator is applicable for the 250, 350 and 500 models.
Transom Heat Pump Water Heater COP Estimator v26.1.0
Use this estimator to determine a climate-adjusted coefficient of performance (COP) for the Transom Heat Pump Water Heater. This estimator is applicable for the V105, V210 and V420 models.
ECO2 CO2 Heat Pump Water Heater COP Estimator v26.1.0
Use this estimator to determine a climate-adjusted coefficient of performance (COP) for the ECO2 CO2 Heat Pump Water Heater. This estimator also includes instructions on modeling storage losses associated with water storage tanks and swing tanks per ECO2's available products. This estimator is applicable for Gen 1 through Gen 5.
Daikin Mega-Q Heat Pump Water Heater COP Estimator v26.1.0
Use this estimator to determine a climate-adjusted coefficient of performance (COP) for the Daikin Mega-Q Heat Pump Water Heater. This estimator is applicable for the RXHWQ120MQTJA heat source unit model paired with the BWLP120TJU cascade unit model.
ICE AIR Heat Pump Water Heater COP Estimator v26.1.0
Use this estimator to determine a climate-adjusted coefficient of performance (COP) for the Ice Air ccHPWH. This estimator is applicable for the 275-D-B, 275-S-B, 550-D-B and 550-S-B models.
DOE Efficient New Homes Requirement Paused for Multifamily Phius Projects
Phius has made the decision to place a pause on requiring DOE Efficient New Homes Multifamily Version 2 certification as a co-requisite for multifamily projects.
Feasibility Study Checklist Webinar
Phius Certification Program Director James Ortega discusses the checklist for Phius feasibility studies and how they can be beneficial to project teams.
February 2026 Project Spotlight: Spark Side
This edition of the Phius Project Spotlight Series features the Spark Side single-family home in Durham, New Hampshire.
January 2026 Project Spotlight: The Pierce at 7 Van Buren
This edition of the Phius Project Spotlight Series highlights The Pierce at 7 Van Buren, a Phius ZERO multifamily building in the Chicago area.