Showing results 1 - 36 of 36
Image
A constant airflow regulator is a modulating orifice that automatically regulates airflows in duct systems to constant levels
Image
A constant airflow regulator is fitted into the neck of the supply duct to control air flow to deliver the design airflow regardless of pressure variations
Image
Image
A ducted central return brings air from central return registers back to the air handler through insulated, air-sealed ducts
Image
Image
Image
Image
An air vent mounted high on the radiator will shut quickly and limit the radiator’s heat output
Image
An air vent mounted low on the radiator will allow more steam to enter the radiator before it shuts
Image
Image
Anode bars can protect boiler steel without the bad effects of chemical water treatment
Image
Bedrooms pressure-balanced and provide 1 sq. in. of free area opening per 1 CFM of supply air or achieve a Rater-measured pressure differential ≤ 3 Pa
Image
Bedrooms pressure-balanced and provide 1 sq. in. of free area opening per 1 CFM of supply air or achieve a Rater-measured pressure differential ≤ 3 Pa
Image
Direct-heat risers are bare pipes that heat the space they're in without connected radiators
Image
Do not install a main vent on top of a drip leg where water spitting is likely to occur, which can damage the vent
Image
Door has been undercut to allow for specified amount of air flow therefore contributing to pressure balancing
Image
Image
Door undercuts are commonly used to provide a return air pathway from rooms with closed doors
Image
Image
Duct to boot connection of jump duct not fastened and sealed
Image
Image
In this traditional steam header, the steam makes a 90-degree turn to supply the building, while the heavier water droplets are carried back to the boiler
Image
Install a master vent tree to release air and prevent air binding which blocks steam heat from reaching its destination
Image
Image
Image
Image
Image
Image
Image
Right – A transfer grille is installed high on a bedroom wall in a new-construction home
Image
Right – Transfer grilles are installed over doorways to bedrooms in a new-construction home
Image
Simplified schematic of a one-pipe steam system showing the main and risers with fast vents and the radiators with slow vents
Image
Some radiators are behind covers so the cover must be removed to identify the air vent
Image
The exposed riser shown here also supplies the radiator. A short pipe runs under the floor to the hand valve.
Image
Image
