7 Best Z Wave Thermostats 2021 for your Home – Review Guide


Do you have several Z-Wave compatible smart devices in your home? In that case, the best way for them to interact with your smart thermostat is to obtain a Z-Wave thermostat.

Z-Wave is a wireless protocol that allows devices to communicate with each other on a network. It consists of a central hub (such as Samsung SmartThings or Wink) that can control all Z-Wave compatible smart devices, including Z-Wave thermostats.

Thus, Z-Wave thermostats are basically intelligent thermostats compatible with the Z-Wave wireless protocol. They can appear as a new node in your existing Z-Wave smart home network. However, to control Z-Wave thermostats, you must have a Z-Wave hub.

Our Top Pick

Last update on 2022-12-05 / Affiliate links / Images from Amazon Product Advertising API

Top 10 Best Z Wave Thermostats To Buy In 2021

Last update on 2022-11-24 / Affiliate links / Images from Amazon Product Advertising API

10 Best Z Wave Thermostats Review

SaleBestseller No. 1
Honeywell TH6320ZW2003 T6 Pro Series Z-Wave Stat Thermostat & Comfort Control, Smart Home
  • This Certified Refurbished product is manufacturer refurbished, shows limited or no wear, and includes all original accessories plus a 90-day limited hardware warranty.
  • Finish: White
  • Manufactured By: Honeywell Home
  • Depth: 2.27 in.
SaleBestseller No. 2
Honeywell Home TH6320ZW2007/U Z-Wave T6 Pro Programmable Thermostat with SmartStart, Low Voltage, UWP Mount, White
  • Flexible scheduling: The thermostat is fully programmable when not included into a Z-Wave network. Each day can be programmed for different heating and cooling settings in 4 unique periods (Wake, Away, Home, Sleep). The thermostat scheduling options available differ depending on whether the thermostat is included or excluded from Z-Wave network, on capability of your Z-Wave controller and app to program thermostat.
  • Displays ambient air temperature, % relative indoor humidity and reports HVAC system status: You can display actual temperature or % relative humidity, or to see whether your cooling / heating system is running.
  • Auto change from heat to cool: When Auto mode is selected, the T6 Pro Z-Wave thermostat can automatically determine whether your home needs heating or cooling to reach the desired temperature at the right time.
  • Smart Alerts: The T6 Pro Z-Wave thermostat can alert you when your HVAC system is not working properly and can remind you for things like when to change your furnace filter.
  • Adaptive Intelligent Recovery: The T6 Pro Z-Wave thermostat learns your heating and cooling cycle times to make sure the system delivers the temperature you want, when you want it. (Available only if the local thermostat schedule is enabled.)
SaleBestseller No. 3
Stelpro Z-Wave Plus KI STZW402WB+ Thermostat (White) for Electric Baseboards and Convectors
  • UNIQUE Z-WAVE: The Stelpro KI is the first Z-Wave thermostat in North America to work with line voltage, with a 2-wire connection to the heater.
  • EFFICIENT HEATING: Remotely control your baseboard and convector heaters from your mobile device or computer (when included to a Z-Wave gateway controller - sold separately).
  • SAVE SMART: Set your own temperature schedules to reduce energy bills with minimal effort; take advantage of the device's ECO mode, designed to be as energy-efficient as possible.
  • ELEVATED CLIMATE CONTROL: Create advanced automations by pairing the Stelpro KI with other Z-Wave devices. Trigger the heating on/off with a door/window sensor, temperature sensor, motion sensor, etc.
  • CERTIFIED QUALITY: This thermostat is Z-Wave Plus and UL certified. Made in Canada. Works with SmartThings, Vera, HomeSeer, Nexia and Wink.
Bestseller No. 4
RCS Technology RCS Z-Wave Thermostat, TBZ48, Battery
  • A quality product by RCS Technology
  • A quality product by RCS Technology
  • A quality product by RCS Technology
  • A quality product by RCS Technology
  • A quality product by RCS Technology
Bestseller No. 6
Qubino Z-Wave Plus Smart On/Off Thermostat 2 ZMNKID3 (Z-Wave Hub Required)
  • Monitor and change the temperature within a room via Z-Wave controller
  • Compatible with 110-230 VAC and 24-30VDC power supplies
  • Small device size allows for quick and easy installation in nearly any setting
  • Compatible with leading automation brands including Fibaro, Google Home Assistant, HomeSeer, SmartThings, Vera, Zipato, and more!
Bestseller No. 7
2GIG Smart Z-Wave Plus Model 2GIG-STZ-1 Programmable Thermostat, Humidity Sensing and Control, SmartStart Support, S2 Authentication Security, Fixed Format Display, Auto/On Fan Mode
  • 700-series Z-Wave Plus support, Longer range wireless capability
  • Humidity sensing and control
  • SmartStart Support
  • Can be powered by an HVAC system's 24VAC "C" wire
  • S2 authentication security
Bestseller No. 8
2GIG CT-30 Radio Thermostat Z-Wave
  • Z-wave
  • Programmable
  • Vivint
Bestseller No. 9
Radio Thermostat CT32 7-Day Programmable Thermostat (Z-Wave Enabled)
  • Sleek 7-day programmable thermostat with touchscreen controls
  • Includes 300 series z-wave module
  • Can control up to 2 stages of heat and 2 stages of cool. The Ct32 allows you to program up to 4 independent periods per day
  • The Ct32 is designed to run on batteries, making it a great replacement with no need for that pesky c wire connection you may have seen with other models
  • Works with nearly any hvac system - including traditional furnaces and heat pump
Bestseller No. 10
Google Nest Thermostat - Smart Thermostat for Home - Programmable Wifi Thermostat - Snow
  • ENERGY STAR certified smart thermostat for home that helps you save energy and stay comfortable.Product note: You can also check your system’s compatibility before purchasing a Nest thermostat with our online Nest Compatibility Checker on the Google Nest support page
  • The Nest Thermostat is designed to work without a C wire in most homes, but for some systems, including heating only, cooling only, zone controlled, and heat pump systems, you’ll need a C wire or other compatible power accessory
  • Nest Thermostat turns itself down when you leave, so you don’t waste energy heating or cooling an empty home; easily program an energy efficient schedule in the Google home app on your Android or iPhone
  • Remote control lets family members change the thermostat temperature from anywhere on a phone, laptop, or tablet[1]
  • Savings Finder looks for more ways your thermostat can help you save, and suggests tweaks to your schedule in the app; check with your energy provider to learn more about rebates and more ways to save on a Nest thermostat

Last update on 2022-11-24 / Affiliate links / Images from Amazon Product Advertising API

What is Z-Wave Protocol?

Z-Wave is a smart home protocol that allows commands to travel from one device to another. Connected devices create a non-centralized mesh network with multiple paths to reach different destinations.

Its goal is to provide a set of standardized commands to make communication between home automation devices easier. 

Currently, Z-wave plus is released as an upgrade of the original Z-Wave protocol, it’s more power efficient and more secure than it’s precedent.

Why Get a Smart Thermostat

Old fashioned thermostats that barely control temperature are no longer viable. Smart thermostats are much better at providing comfort and energy savings. With a smart thermostat, you have multiple ways to control your thermostat and set the temperature.

  1. Scheduling – Create a daily schedule to set the temperature to the right level based on what you are doing. I personally like in cooler when I’m sleeping at night.
  2. App Control – Change the temperature of the thermostat using a smartphone app. You can even control the thermostat remotely if it is connected to the internet.
  3. Voice Control – Many smart thermostats can be controlled with Alexa, Google Home or Siri. This makes is very convenient to lower or raise the temperature even if you are sitting on the couch.

With all of these controls, you can see why it is very convenient to have a smart thermostat. The added benefit is energy savings. You are no longer heating or cooling the house if you aren’t home. These dollars add up over time!

In short, a convenient smart thermostat combined with a good HVAC system will turn your hot summers into breezy ones and your freezing winter nights will be warm and cozy.

Benefits of Z-Wave Thermostats

There are several great smart thermostats available today. Why should you choose a Z-Wave thermostat? What are the benefits of a Z-Wave thermostat versus. a Wi-Fi thermostat? Here are the primary benefits of a Z-Wave thermostat. 

No Need for Wi-Fi

The two primary options you have for a smart thermostat are Wi-Fi and Z-Wave. The main appeal of not using Wi-Fi as a communication protocol is privacy. A local Z-wave transmission protocol grants data integrity and confidentiality.


Adding new Z-Wave devices to your smart home is network is easy. Additionally, adding new devices to an already existing network makes the mesh network even stronger. This makes all of your Z-Wave devices better or more reliable. 


Technically speaking, Z-Wave runs at a low frequency, thus minimizing the interference with other wireless signals. If a signal faces no interference on its path, it means smoother transmission and less energy consumption. It is also more reliable than Wi-Fi.

Low Power Requirements

Z-Wave is very efficient and only uses a small amount of power. This gives you options you won’t find in Wi-Fi thermostats that use more energy. The biggest advantage is the ability to power the thermostat using batteries. This is a great choice if you have an older thermostat without a C wire to power the device. 

Factors to Consider Before Buying

These are the main factors you should look for in every product before purchasing.


Assembling pieces of your smart home is like working on a puzzle. It’s challenging, but rewarding when you see the final result. Perhaps the most pressing issue you’ll face is compatibility.

You should do thorough research to know how to connect your upcoming thermostat and to understand the existing infrastructure of your home automation system if it exists.

Getting a thermostat that works with Z-Wave protocol is not enough. Beware that some products have features that differ from one hub to another. Make sure you are choosing a thermostat that is proven to work with your Z-Wave smart home hub.

The compatibility issues we’ve been talking about were mainly regarding hubs. However, you can face other compatibility issues concerning the HVAC system.

Before buying, you need to double-check that the thermostat you intend to get is compatible with your currently installed HVAC. Check the wires connecting your current thermostat and make sure your new thermostat has the same connections available.

Compatibility with Alexa is also something to consider if you’d like voice commands.

Power Supply

Power is the single biggest issue most people face when buying a smart thermostat. A lot of smart thermostats require a C wire, but not all of them. If you don’t have a C wire, then you should focus on thermostats that don’t require it. If you really like a smart thermostat that requires a C wire, then you can pay an electrician to install one in your home.

Since we’re talking about Z-wave thermostats, you will find that most of them are designed for low power consumption. In most cases, a Z-Wave thermostat can operate on batteries alone without the need of a C wire.


A thermostat isn’t a device that you’re going to replace every now and then. You need to make sure that it’ll stick with you as long as possible. One way to help with that is to know that the manufacturers have your back by offering a good warranty.

Best Brands of Z-Wave Thermostat

Like any other product, you will find yourself at crossroads between so many brands promoting themselves for selling the best product. Despite all that, there are certain brands that serve you well because they know exactly what is needed. For a product like a Z wave thermostat, this is extremely important so choose your brand wisely.


Honeywell is a brand that has the most basic thermostats as well as the most advanced ones as well and even products that can accommodate both. It is quite a vast brand otherwise but serves well when it comes to the Z wave thermostat because of its products being highly customized in nature. The brand gives you features that can be altered according to our requirements.


Nest is the first brand to have its Z wave thermostat energy star certified which is a huge accomplishment because our hvac systems and other temperature related systems are connected to it. These put a major load on the environment so Nest becomes a very considerable brand in that case.


We all live in a smart world now which is full of smart devices. Trane makes sure even our homes function smartly by giving out smart devices like the Z wave smart thermostats they have. It is one of the first brands to have extremely customizable and smart thermostats that have features that can be altered by the user. This is why a Trane Z wave thermostat is the best out of our list.

Features to consider while buying a Z Wave Thermostat


Most Z wave thermostat have a Z wave hub but many simply work on Wi-fi as well. Here, you have to make a choice based on the level of technology you want in you house. If you want to add on more Z wave devices later on then buy one with a base hub. This is obviously a better option because the wi-fi one isn’t as programmable.


The good part about a Z-wave thermostat is that they have programming features although some might not have that. Check if the brand mentions built in programs to control the temperature. This option gives you a guide to follow when setting a specific temperature inside the house because you will know what is right.


Mostly thermostats are easy to install, it is just putting them on a wall or in a junction box at the most. But here, installation also includes setting it up. the more programmable a thermostat is, easier it is to set up.

What Makes an Ideal Z-Wave Thermostat?

Numerous products inundate the market, so it’s challenging to make a selection.

Therefore, we compiled a list of prominent factors that we think each ideal Z-Wave Thermostat should include. It’ll help you decide which features are crucial and a must-have.

1. Compatibility With Your Existing/New Z-network

Whether you already have a current system or looking to create a new one, always conduct prior research before purchasing a thermostat. The product you are buying needs to be compatible with your network. If not, then it will be dysfunctional.

Although few reports are suggesting that even complimentary devices occasionally have problems, it’s best to examine the equipment before your decision critically. The initial starting point should be to read the included document’s description.

If the language appears cryptic or hieroglyphic, then search for expert reviews. They’ll break it to you in lucid terms so that you won’t have any problems. Forums and detailed customer evaluations of a device can also aid in your research.

However, if you’re still skeptic about the decision, you can always contact the manufacturers.

Most of them provide instant customer support, and you’ll receive answers to your query in a few business days.

2. HVAC System Support

You need to ensure that the newest addition to your smart family supports your current heating and cooling system. Any contradiction here would result in either poor application or downright non-functionality.

Check the manufacturer’s website for pertinent information, and observe the list of compatible devices.

All products are extensively organized, so the details are a few clicks away. If the website doesn’t work for you, attempt in the traditional manner; either call or email.

3. Power-type

How your device gets the necessary power is another significant consideration. There are two different approaches available in the market, which are either C-Wire or battery-powered.

The former refers to a low-voltage cable that powers your device. Most updated thermostats come with C-wires. However, battery-powered products are also efficient if it’s compatible with your current system.

A note of caution, if your home doesn’t support C-wire, you need an expert to redo the entire wiring. You should opt for a product that meets the demands of your existing situation.

4. Energy Efficiency

Several products in the market have a handy addition called the “Auto-Away.” It utilizes motion sensors to detect whether you’re home or not.

If you’re on vacation, or away from home for an extended period, automatically the device switches into energy saving.

If you’re looking for maximum cost-efficiency, then be mindful of this feature.

5. Notifications

The cutting-edge Z-wave thermostats can alert you when they sense any anomaly in the atmosphere of your home.

If by any chance, the temperature reaches critical condition, hot or cold, your smart device can inform you through push notifications.

This feature can prevent any unwarranted damage; you can feel safe even when you’re not close to your house.

6. Algorithm

One feature that comes with top-tier Z-wave thermostats is their ability to understand your schedule automatically.

Through their algorithm, the machines can learn your behavioral patterns. It helps automated thermostat adjustment without any effort from you.

7. App and Remote Control

Your Z-wave thermostat will either come with a native app or a remote-control interface. For the latter, you’ll get extensive flexibility because you can set and adjust the temperature differently for each part of your house.

If you have guests on board who have particular atmosphere needs, you can easily control it by using the remote.

Some devices come with a native app; if not, they allow using the universal Z-Wave one. This software can help you monitor your home temperature, or control it from a distance.

8. Shape

Another primary consideration is the design of your device. While some products focus on functionality over aesthetics, others take the later into account as well.

Although you should not compromise quality for looks, we recommend that you find a device that matches your home interior.

You don’t want your thermostat to be glaringly visible for the guests.

Installing a thermostat without a C Wire

Now we’ll discuss the steps on how to set your thermostat up without a C-Wire.

1. Observation

The first thing you need to look for is whether your current device has a C-Wire or not. Ask yourself if you have a 24v low voltage HVAC system.

You need to detach it and observe the wiring. You have a C-Wire, if you find a terminal with the label C. If you don’t see any tag, look for a blue cable.

There can also be a hidden wire behind your wall. So, to check the source of power, go to your furnace. Afterward, check the connection and labels to ensure if you have it.

2. Search For an Alternative Product

If you don’t have a C-Wire, then the most straightforward workaround is to purchase a Z-Wave thermostat that doesn’t require it. There are few products available in the market for purchase.

3. Use a G-Wire

Another solution is to replace the C-Wire with a G-Wire. While the former provides continuous power by utilizing the furnace, the latter connects to a fan. It is a suitable substitution.

To get the best results, you should have forced air, propane or gas cooling, and heating system.

However, the replacement comes with a trade off. It will strip your ability to control your fan. While it offers convenience, you’ll lose some features.

4. Buy an Adapter

You can also choose an alternative adapter to operate as a C-Wire. These products are cost-effective and can act as an alternative.

5. Full-scale Rewiring

One more reasonable and permanent solution, if you want to have a smart house, is to change the wiring of your HVAC system.

It means you’ll need to rewire the whole system through your walls. The task can be a breeze or a challenge depending on the dimension of your house.

Our recommendation is to look for a professional technician to this job for you.

Although this is lengthy, it is the safest and a one-time solution to all your wiring difficulties.


A thermostat is important for any smart home and for people who are conscious of the temperatures within their homes.

The Z-wave thermostats have taken the market by storm over their popularity. Well, the enthusiasm is for a good reason. Admittedly, there are so many devices in the market and getting the right one for your requirements may be a bit confusing.

We trust that this guide gives you confidence to select the best z-wave thermostat that suits your needs, taste and budget. Cheers!

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