Azel Technologies

Azel Technologies manufactures controls for hydronic radiant floor heating systems, with a stated mission of promoting energy efficient radiant floor heating through its product line. The company's catalog centers on the equipment installed between a boiler or heat source and the individual zones of a radiant floor system.

Azel's lineup starts with digital setpoint temperature controls used directly on a boiler or heat source. It continues with the switching relays and zone valve controls that route heat to individual zones. It ends with the thermostats installed in each room.

Product Lines

Azel's digital setpoint temperature controls come in three lines. The DST-777 series is for single and two stage applications with a minus 40 to 240 degree Fahrenheit range. The DST-900 and DST-922 universal controls have a minus 39 to 248 degree Fahrenheit setpoint range. The DST-932 is a solar differential control for solar heating systems.

For zoning, the i-Link series covers circulator pump switching relays in one to six zone models and zone valve controls in four to six zone configurations. The thermostat lineup includes non-programmable models for basic heat only control and radiant floor applications. It also includes programmable models for heating and cooling systems and for hydronic radiant floor heating. Azel also makes a dual display temperature gauge for monitoring supply and return temperatures, and thermistor sensor probes that can be extended up to 500 feet.

Why Contractors Specify Azel Technologies

Installers working radiant floor jobs specify Azel because the product line covers the full signal path from thermostat to zone valve to circulator relay. This reduces the number of manufacturers a job needs to source controls from.

The extended range thermistor probes run out to 500 feet. They make Azel a practical choice on larger radiant floor installations where the sensor must reach a boiler room or mechanical closet far from the zone being controlled.

How to Choose Azel Technologies Products

Matching a zone control to a job starts with counting zones. The i-Link switching relays and zone valve controls are available in models that top out at four or six zones. A job with more zones than that needs multiple relay units.

For the thermostat, the choice between programmable and non-programmable comes down to whether a setback schedule is wanted. Radiant floor jobs should use a thermostat built for floor sensing, such as the dual sensor models, rather than a standard air sensing thermostat. Floor temperature and room air temperature respond at different rates.

Frequently Asked Questions

How many zones can Azel's switching relays handle?

Azel's i-Link series circulator pump switching relays are available in one to six zone models.

Does Azel make thermostats specifically for radiant floor heating?

Yes. Azel's D-508F and D-26FS thermostats are built for floor heating applications, and the D-502F is a programmable radiant floor model.

What temperature range do Azel's digital setpoint controls cover?

The DST-777 series covers minus 40 to 240 degrees Fahrenheit, and the DST-900 and DST-922 series cover minus 39 to 248 degrees Fahrenheit.

How far can Azel's sensor probes be extended?

Azel's P-01 and P-03 thermistor probes can be extended up to 500 feet.

Does Azel make a control for solar heating systems?

Yes. The DST-932 is a solar differential control built for solar heating applications.