Overview

To ensure best practices and outcomes, HPD has developed technical guidance and resources to support our programs. The documents on this page are referenced in HPD Design Guidelines, HPD’s REDi program, and elsewhere as needed.  

Technical Requirements: 

• HPD Technical Requirements- Split System Heat Pump for Space Heating 
• HPD Technical Requirements- Room Heat Pump 
• HPD Technical Requirements- Heat Pump Water Heater 
• HPD Technical Requirements- Refrigerant Management (Refrigerant Charging and Leak Prevention)  
• Equipment Right-Sizing Guidelines 
• Clarifications on Electric Resistance  
• HPD Solar Technical Requirements

Refrigerants: 

• DOB Final Rule Rules relating to Safety Standards for Refrigeration  
• HPD A2L Revised Guidance  
• HPD A2L Presentation 2026  

 Maintenance: 

• HPD VRF and Split System Maintenance Plan 
• HPD Maintenance Service Contract Checklist 
• PTHP Maintenance Plan & Service Overview  
• DHW Maintenance Plan (coming soon) 

Resident Resources: 

• QR Code Signage (coming soon) 
• Residential User Tips for Air Source Heat Pumps 
• NYC's Utility Assistance Programs 
• Community Solar