'/%3E%3C/svg%3E)
Hover image to zoom
Wirsbo Radiant Thermostat (WT 1), Heat Only, Two-wire
 --%3E %3Csvg version='1.1' id='Fill' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' viewBox='0 0 100 100' enable-background='new 0 0 100 100' xml:space='preserve'%3E %3Cpath fill='%23F15C02' d='M79.44,0.95H20.56C9.78,0.95,0.95,9.78,0.95,20.56v58.87c0,10.79,8.82,19.61,19.61,19.61h58.87 c10.79,0,19.61-8.83,19.61-19.61V20.56C99.05,9.78,90.22,0.95,79.44,0.95z M65.38,58.24l9.38,29.58L49.69,69.78L24.5,87.82 l9.34-29.6L8.8,39.6l30.73-0.17c0,0,6.98-19.61,10-28.93c0.54,1.36,9.88,29.1,9.88,29.1H91.2L65.38,58.24z'/%3E %3C/svg%3E){kind=small}
Hover image to zoom
' fill='%23F15C02' d='M49 0C21.938 0 0 21.938 0 49s21.938 49 49 49 49-21.938 49-49S76.062 0 49 0m0 82.709a7.54 7.54 0 1 1 0-15.08 7.54 7.54 0 0 1 0 15.08m7.54-28.412a7.541 7.541 0 0 1-15.08 0V22.831a7.54 7.54 0 0 1 15.08 0v31.466z'/%3E%3C/svg%3E)
A3030101 has been discontinued
Discontinued April 11, 2017
This product was discontinued by the manufacturer.
MANUALS (2)
Direct Replacement:
 --%3E %3Csvg version='1.1' id='Half' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' viewBox='0 0 100 100' enable-background='new 0 0 100 100' xml:space='preserve'%3E %3Cg%3E %3Cpath fill='%23F15C02' d='M30.05,70.23l3.79-12.01L8.8,39.6l30.73-0.17c0,0,6.98-19.61,10-28.93c0.54,1.36,9.88,29.1,9.88,29.1h1.58 L93.71,7.18c-3.58-3.82-8.66-6.23-14.28-6.23H20.56C9.78,0.95,0.95,9.78,0.95,20.56v58.87c0,5.41,2.22,10.32,5.79,13.88 L30.05,70.23z'/%3E %3C/g%3E %3Cpath fill='%23FBC8B4' d='M93.71,7.18L60.98,39.6H91.2L65.38,58.24l9.38,29.58L49.69,69.78L24.5,87.82l5.55-17.59L6.75,93.32 c3.55,3.54,8.44,5.73,13.82,5.73h58.87c10.79,0,19.61-8.83,19.61-19.61V20.56C99.05,15.4,97.01,10.69,93.71,7.18z'/%3E %3C/svg%3E){kind=small}
 --%3E %3Csvg version='1.1' id='With-RB' xmlns='http://www.w3.org/2000/svg' xmlns:xlink='http://www.w3.org/1999/xlink' x='0px' y='0px' viewBox='0 0 100 100' enable-background='new 0 0 100 100' xml:space='preserve'%3E %3Cpath fill='%23FBC8B4' d='M79.44,0.95H20.56C9.78,0.95,0.95,9.78,0.95,20.56v58.87c0,10.79,8.82,19.61,19.61,19.61h58.87 c10.79,0,19.61-8.83,19.61-19.61V20.56C99.05,9.78,90.22,0.95,79.44,0.95z M65.38,58.24l9.38,29.58L49.69,69.78L24.5,87.82 l9.34-29.6L8.8,39.6l30.73-0.17c0,0,6.98-19.61,10-28.93c0.54,1.36,9.88,29.1,9.88,29.1H91.2L65.38,58.24z'/%3E %3C/svg%3E){kind=small}
Product Highlights
–
Non-Programmable
24V, Low voltage
1 Heat
Vertical
Hardwired
White
Description
–
- When it comes to radiant heating systems, not just any thermostat will do. That's why professional installers choose Wirsbo Radiant Thermostats. They are the first thermostats designed specifically for radiant floor heating.
- Why a special thermostat for radiant floor heating? The dynamics of a radiant heating system differ from typical baseboard or warm air heating systems. Radiant systems always heat objects and mass, and need to be addressed differently than conventional thermostat logic.
- The Wirsbo Thermostats offer two different control methods to handle this condition--differential and pulse-width modulation. Differential--When the measured room temperature falls 1F (0.5C) below the desired room setting, the control devices wired to the thermostat turns on.
- Pulse-width Modulation--When the condition exists where the room temperature is 1 to 3F (0.5 to 1.5 C) below the room setting, the thermostat manages the on-and-off cycle using pulse width modulation. The on-and-off times vary depending on the difference between the room and set temperatures. The farther away the room temperature is from setpoint, the longer the on time. This prevents the room temperature from rising above the set temperature. The heating system runs continually at room temperature differences greater than 3 degrees F below setpoint.
- These thermostats also feature digital filtering. This means that the thermostat measure the room temperature continuously. The thermostat's sensor detects even the smallest change, making it better able to react to a room's changing conditions. If all the room's temperatures were displayed as they are sensed, the temperatures shown would appear erratic and inconsistent. Filtering works by averaging the sensed values to ensure a smooth operation and display.
- Wirsbo offers three thermostat models: Heat Only (A3030101), Heat and Cool (A3030102) and Heat Only, Three-wire (A3030103). The Heat Only (A3030101) and Heat and Cool (A3030102) thermostats are designed to operate in heating mode over two wires. These types of thermostats obtain their power for operation from taking voltage from the connected wiring. Different from other industry power-sharing thermostats, these eliminate any need for a third wire or battery, which makes the thermostats simple to install, wire and service.
- And for those times when the two-wire thermostats aren't appropriate because of incompatibility with some third-party devices, Wirsbo also offers the Heat Only, Three-wire (A3030103).
- No matter which thermostat you use, when you're selling radiant, you're selling comfort, The Wirsbo Radiant Thermostats feature special built-in software that provides the ultimate control that standard thermostats--when used with radiant heat--simply cannot. There's no overshoot, no undershoot--just constant, even comfort. Your customers will love the distinctive design and easy-on-the-eyes readout. But most of all, they will love the true radiant comfort only Wirsbo Radiant Thermostats provide!
Specs
–
| Application: | Heat Only |
|---|---|
| Stages: | 1 Heat |
| Programmability: | Non-Programmable |
| User Interface: | Push Button |
| Mount: | Vertical |
| Power Method: | Hardwired |
| Voltage: | 24V Low voltage |
| Operating Voltage: | 24 VAC +/-10% |
| Wiring: | Two-Wire |
| Color: | White |
| Height: | 5" |
| Length: | 2.72" |
| Depth (Inches): | 0.91" |
| Max. Load: | 1.3A at 24 VAC |
| Display Range: | 32 to 99°F |
| Resolution: | 1° Displayed 0.25° Calculated |
Questions?
Speak with a real person who will go out of the way to help!
Call or text 888-757-4774
Monday – Thursday
8am–7:45pm
Friday
9am–7:45pm
Saturday – Sunday
9am–5:45pm
Product Reviews
4.81 out of 78 reviews
99% would recommend this product
5 star
85%
4 star
12%
3 star
4%
2 star
0%
1 star
0%
Most Liked Positive Review
Very satisfied
I got these because one of our thermostats was acting up. A replacement was easily installed and worked well in the room which has been more evenly heated ever since. The result was so satisfactory that I ordered 4 more for other zones because it was obvious that the electronics. including the temperature sensor, had been changed from the originals which were installed in 2009. If you can use a screwdriver you can install this unit. Only a few minutes are required for installation. [...]
VS
Most Liked Negative Review
no backlight
Works great, but no backlight. In order to adjust the temp at night, yiou need to have a flashlight or turn on the room lights. Why would they make a thermostat without a backlight?
Showing 1-10 of 78 reviews
Good thermostat but...
It would be nice if it had a illuminated digital display. You can't see the display at night.
Jorge
NJ
10 years ago
Verified Buyer
Was this review helpful to you?
Good product that I needed and I bought it again yesterday.
Very good selection of products for my house. In addition, these guys are great at delivering my orders. I ordered a thermostat on Sunday afternoon and got a confirmation a few hours later that they shipped it.
Michael Roth
NYC
10 years ago
Verified Buyer
Was this review helpful to you?
Was the exact model we have had since 2001 in our home.
I was thankful they were still available for replacement. We have eight of them in our home and this was the only failure since 2001.
riverman
Hayward, Wisconsin
10 years ago
Verified Buyer
Was this review helpful to you?
Well worth the investment
Much, much better than the previous thermostats we used. These are maid for radiant-floor heating systems, which we have, and for this purpose they work perfectly. We did not have to adjust the thermostats all winter, the house was the most comfortable it has been, and the furnace did not "jitterbug".
P&J
Las Cruces, NM
10 years ago
Verified Buyer
Was this review helpful to you?
Using for Geothermal Radiant Heating
This is a great thermostat for use with geothermal and radiant heating. It keeps right near the set-point with very little variance which is ideal for geothermal heat.
Bob the Builder
Frenchtown
10 years ago
Verified Buyer
Was this review helpful to you?
Great Product, simple install
I did need to wire in the resistor for this to be compatible with my Taco SR504EXP controller Unit. However, it was quite easy to do. New units work much better then what they replaced (no temp overshoot on my in-slab hydronic heat), plus they don't need batteries, so no maintenance issues with battery replacement. Highly recommended, and much cheaper then some of the similar competitor models. I've had this same T-stat in use in a different property for over 8 years without a single problem.
Hugh
Rice County, MN
10 years ago
Verified Buyer
Was this review helpful to you?
Radiant radiant
Great set and forget thermostat. I use these all the time for radiant heat control. It is non programmable but will always maintain set temp. Ordinary thermostats will always overshoot and allow room temp to rise higher that set when controlling radiant type system.
Zach
New city, ny
10 years ago
Verified Buyer
Was this review helpful to you?
easy to install and works just the way it is advertised
This product works perfectly and is simple to install. Make sure you read the instructions and understand how it works. It has a pulsing future which is activated when the room only calls for a few degree change, in order to keep the room from over heating.
Dahiburd
DC
10 years ago
Verified Buyer
Was this review helpful to you?
wire up and go (simple-dimple)
these stat comes with a 1000 ohm resistor contacted tech support regarding the installation of this using 3rd party accessories. tech support said if I wasn't experiencing any problems then there would be no reason to install.
babe
spokane
10 years ago
Verified Buyer
Was this review helpful to you?
Works fine.... But
This product works as advertized. Maintains desired temp without short cycles or overshoot. Recently went on vacation and found that the minimum temperature setting is 59 deg. Also, no on/off switch.
oldbozo
Naples NY
11 years ago
Verified Buyer
Was this review helpful to you?
Product Q&A
38 Questions38 Questions
Q: We have an electric mini boiler from Electro Industries with infloor pex tubing, but we need a thermostat before we can complete the hookup. The thermostat they suggest is ES-24-BR. It is essentially a dial and a slab sensor, and it looks like its from the 1970's. Do you have something digital, non-programmable, but with same floor sensing capabilities?
Asked by Kristin 15 years ago
Add your answer
Verified Reply- PexSupply StaffWe recommend that you look at the Tekmar 509.
Was this review helpful to you?
Q: I hav a radiant floor heat sistem. I hav an x pup block. will the -Wisbero Radiant Thermostat (WT 1),- work
Asked by bos 15 years ago
Add your answer
Verified Reply- PexSupply StaffYes, it will work.
Was this review helpful to you?
Q: Can thermostat be used with electric mats, wired for 220v.?
Asked by Peter Doney 16 years ago
Add your answer
Verified Reply- PexSupply StaffNo, it cannot be used for that purpose. The thermostat is a 24 volt unit.
Was this review helpful to you?
- Z-Man
No, T-stat is for 24 volt system.
Was this review helpful to you?
Q: i have the wirsbo 2 wire thermostat and it is reading in celcius . how do i get it back to farenheit ?
Asked by 16 years ago
Add your answer
Verified Reply- PexSupply StaffTake a look at page 4 of this manual (Under the section titled "Units"): http://s3.pexsupply.com/manuals/1286975873009/40450_PROD_FILE.pdf
Was this review helpful to you?
Q: We have the Wirsbo Heat Only 2 wire thermostat which controls the radiant floor heat in one of our 3 zones. We'd like a programmable thermostat. The wiring by the boiler is also Worsbo. Is there a thermostat we can use in this application?
Asked by 16 years ago
Add your answer
Verified Reply- PexSupply StaffAny 2 wire digital thermostat will work with your application. As an example, the TH8110U1003 would be a compatible thermostat.
Was this review helpful to you?
Q: I have both forced air and radiant floor heat, and indirect hot water on a boiler with 3 seperate loops. They are controlled by a TACO-SR504 switching relay. The radiant system is in 3 rooms with different types if systems, but are all on one zone/manifold. Currently, I am using a Honeywell programable t-stat that is acting as a timer, but i can only have 2 on-off cycles in a 24 hour period. I was looking for a digital timer that I could use to program multiple cycles during the day, but i'm wondering if this t-stat would be qa better fit?
Asked by Johnny Radiant 16 years ago
Add your answer
Verified Reply- PexSupply StaffThis thermostat is nonprogrammable and will not work for your application. For 1 zone you can consider the Honeywell TH8110U1003, and for 3 zones you can consider the Honeywell TH8320U1008.
Was this review helpful to you?
Q: When the thermostat flashes different codes under the temperature, what do they mean? IE, ihh. I do not have a user manual. Thank you.
Asked by 16 years ago
Add your answer
Verified Reply- PexSupply StaffThe thermostat flashing different codes indicates errors in the system, most likely having to do with programming. The manual for the product can be viewed at the link below: http://s3.pexsupply.com/manuals/1286975873009/40450_PROD_FILE.pdf
Was this review helpful to you?
Q: I have a water boiler and baseboard radiators. Will this thermostat be appropriate for that application?
Asked by Rayford 16 years ago
Add your answer
Verified Reply- PexSupply StaffThis thermostat is used for radiant heat applications. We recommend looking at the Honeywell thermostats, such as the touchscreen VisionPRO (SKU: TH8110U1003).
Was this review helpful to you?