An official website of the United States government
Here's how you know
Official websites use .gov
A .gov website belongs to an official government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.
This project analyzed combined condensing water heaters or boilers and hydronic air coils to provide high efficiency domestic hot water (DHW) and forced air space heating. Called "combi" systems, they provided similar space and water heating performance less expensively than installing two...
Case study describing how combination space and water heating systems can be used in homes with efficient thermal enclosures, decreasing energy consumption and costs.
Video explaining issues with backflow from drains and sewer lines and a discussion about different valve types used in water management practices from LSU AgCenter.
Article describing how demand plumbing systems send cold water back to the water heater until hot water arrives at the sink, shower or other fixture where it is needed.
Case study describing the installation four high-efficiency natural gas water heaters n single-family homes and their savings potential, installed efficiencies, and abilities to meet household demands.
Case study describing an alternative ground source heat pump (GSHP) cold-climate application in an attempt to reduce the installation cost of the ground loop portion by containing the entire loop beneath the basement slab.
Guide describing the installation of a tankless hot water heater to provide domestic hot water that is heated on demand without the standby losses associated with tank storage water heaters.
Information guide describing things to consider when considering home retrofits in the basement or crawlspace including HVAC, wiring, or structural systems.