Earth tubes (also known as Air to Earth Heat Exchangers AEHX) can be designed many ways. Here we will try to sort it all out...

The drawing above illustrates a set of four earth tube ventilation pipes as they're normally installed within a monolithic slab. Please note the use of 45 degree fittings which help accentuate airflow and make …

May 12, 2017 · An earth tube is a buried ventilation duct. The idea behind burying ventilation ducts — the ducts conveying fresh outdoor air to a building — is that the soil surrounding the ducts will warm …

Planning well in advance will reduce logistical constraints. These earth tubes offer a sustainable alternative to reduce or eliminate the need for conventional compressor-based air conditioning and …

The relationships between the soil, tube design, ambient air, and air velocity are quite complex. This document outlines the fundamental design principles and then applies these principles using …

Mar 12, 2025 · You'll typically see temperature drops of 10-20°F, depending on factors like soil composition, tube depth, and length. Earth tubes can be integrated with your existing HVAC system …

Earth tubes can provide a low tech solution to pre-heating or cooling an air supply resulting in reduced heating and cooling loads on the building plant. Earth tubes can form part of an entirely passive …

The following examples are taken from the multiple Earth Tube projects Lee & de Ridder have designed / implemented and been involved with.

Jun 17, 2025 · Explore the latest innovations and future directions in earth tube technology, and learn how architects and builders can integrate earth tubes into modern building design.

This Earth tube is approximately 600 linear feet of 2ft diameter cement pipe with rubber gasket joints. It is laid in a 5000 sq ft area, buried 10 ft below the building. PVC Earth-tubes often crack during …