The HVAC Smart Relay Switch (HSRS) is an energy saving device designed to automatically shut off air conditioning or heating when a monitored door or window remains open for a preset period of time. Available in both wired & wireless packages, the system uses compatible door/window sensors – two included. For the wireless edition, choose one of the following product generations:
- GEN2 – Our second generation (classic) sensors feature a usable wireless transmission range of 50 ft. or more. Requiring two (2) AAA batteries (not included), they are auto-addressable (up to 65,000+ possible IDs) and measure 3.25″ x 1.5″ x 0.5″. Foam mounting tape and screws are supplied. (GEN2 sensors do not store a permanent address and therefore must be initialized and re-registered whenever batteries are replaced.)
- GEN3 – Our third generation sensors are available in two models: mini and basic. The mini sensor has a wireless transmit range of 50 ft. (max.) and operates on a single CR2032 lithium coin-cell (included). The basic sensor has similar range and includes a CR123A cell. Each is pre-programmed with a unique, permanent address (over 16 million possible IDs). The mini sensor measures 2.2″H x 1″W x 0.25″D and includes foam mounting tape (no screws).
- The basic sensor measures 3-1/16”H x 1-9/16”W x 1-3/16”D and includes foam mounting tape and screws.
Frequently Asked Questions: |
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- Notes:
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- The two product generations are not cross-compatible as they operate on different radio frequencies. Therefore, a 2nd generation controller will not accept a 3rd generation sensor. Nor will a 3rd generation controller recognize a 2nd generation sensor.
- G2-classic sensors feature a copper coil antenna for excellent signal transmission (50 ft. or higher).
- Both G2-classic and G3-basic sensors provide wired contact screw terminals for optional external wired switch (N/C) or closed contact loop. Unless you plan to utilize this input, it must be disabled to avoid inadvertent trigger. To disable, simply apply a short jumper wire across the wiring terminals.
- RF range varies for every installation. In general, wireless signals can be diminished or impeded by RF interference, concrete walls, large appliances, etc.
The HSRS is fully configurable using onboard DIP switches, allowing you to establish specific operational parameters. For instance, configure the device to temporarily disable the air conditioning or heating system when any door or window has remained open for 10 minutes and then re-enable when the door has remained closed for 1 minute. (Requires installation by a qualified hvac technician.
Features:
- Automatically shuts off air conditioning or heating when a monitored door or window remains open too long
- Accepts wired and/or wireless sensors types – two (2) included. (For additional sensors, see “Related Products” at the bottom of this page.)
- Configurable delay period using onboard DIP switches, up to 10 hours
- Expandable (accepts up to 4 wired zones and/or 8 wireless sensors)
- Ideal for split (central) a/c systems
- Compatible with most existing thermostats
(Note: Installation by a qualified hvac technician is recommended.)
What’s Included:
- HSRS controller with mounting flange
- Two (2) door/window sensors. (For additional sensors, see “Related Products” at the bottom of this page.)
- Power converter (24 vac)
- Integrated RF receiver (wireless systems only)
- Whip antenna (wireless systems only)
- Warning decals – see below:
Notes:
- Though installation is not difficult, a qualified HVAC technician is recommended.
- System includes two (2) door/window sensors. (Add-on sensors also available.)
- Wireless sensors are battery-operated.
Dan (Verified Purchase) –
I have used a similar system in a couple locations over the last ten years in vacation rental condos. They really work to reduce your utility bills. The thing I like about the Kadtronix system is it allows you to use any thermostat you want. The other systems require you to use their t-stat. I like the combination of door sensors to shut off HVAC when doors are left open. Very good people to work with.
Tara Urban (Verified Purchase) –
I found Kadtronix through a google search when I was looking for an HVAC switch to help me control how energy is used in our vacation home when guests leave the external doors open while the central air is on. My HVAC tech asked me to purchase and he would install. I made a few calls to Kadtronix and spoke with Ken who was extremely helpful and patient. At one point he even took the information I had, so that he could research compatibility with the products he sells. He also ensured after I ordered, that the items I purchased showed up in the time frame I needed them. I would recommend Ken and his company over and over. It’s hard to find good prompt customer service and Ken has it mastered. Look forward to future business with this company.