What spacing should be used when installing radiant floor heating?
Spacing of hydronic tubes is dependent on a few variables, including wall R-value, window quantity, and roof or attic insulation. Consult with your radiant floor designer or engineer to determine your radiant floor requirements. It is always important to follow manufacturer’s guidelines and best practices, such as making sure there is enough heat reaching areas more susceptible to heat loss; for example, more radiant tubing will need to be installed under windows because windows are particularly vulnerable to heat loss. Windows do not provide the same thermal resistance as a properly insulated wall. As such, heat from the radiant floor is critical in helping create convection currents to move moisture and dry out stagnant air around windows.