Phone & Email Support

1-844-597-3070 * info@masterbuildermercantile.com

Free Ground Shipping

Free shipping on orders over $125.00 USD. Express available.

Satisfied or Refunded

Refund Available Within 30-Days of Purchase

Secure Information

Secure and Encrypted Payments.

HVAC Control Systems

145 products

Showing 1 - 24 of 145 products

Showing 1 - 24 of 145 products
View
Tekmar 519 Thermostat One Stage Heat With 079 Sensor
Tekmar Tekmar 519 Thermostat One Stage Heat With 079 Sensor
$145.99 USD
No reviews
In Stock
Tekmar 003 Relay 24VTekmar 003 Relay 24V
Tekmar Tekmar 003 Relay 24V
$68.99 USD
No reviews
In Stock
Tekmar 518 Thermostat One Stage Heat
Tekmar Tekmar 518 Thermostat One Stage Heat
$112.99 USD
No reviews
In Stock
Tekmar 564 Thermostat White Invita® WiFi
Tekmar Tekmar 564 Thermostat White Invita® WiFi
$397.99 USD
No reviews
In Stock
Tekmar 071 Universal Sensor
Tekmar Tekmar 071 Universal Sensor
$45.99 USD
1 review
In Stock
Tekmar 563 Thermostat - Conventional 2H/2C or Heat Pump 4H/2CTekmar 563 Thermostat - Conventional 2H/2C or Heat Pump 4H/2C
Tekmar Tekmar 563 Thermostat - Conventional 2H/2C or Heat Pump 4H/2C
$490.99 USD
No reviews
Tekmar 091 Snow/Ice Sensor Socket
Tekmar Tekmar 091 Snow/Ice Sensor Socket
$289.99 USD
No reviews
In Stock
Tekmar 079 Slab Sensor - 10' (3 m) Wire
Tekmar Tekmar 079 Slab Sensor - 10' (3 m) Wire
$50.99 USD
No reviews
In Stock
Belimo Z2050Q-J ZoneTight (QCV), 1/2", 2-Way, Cv 5.9
Belimo Belimo Z2050Q-J ZoneTight (QCV), 1/2", 2-Way, Cv 5.9
$71.99 USD
No reviews
Tekmar 356 Mixing Control - Variable Speed
Tekmar Tekmar 356 Mixing Control - Variable Speed
$464.99 USD
No reviews
In Stock
Tekmar 090 Snow/Ice Sensor In-Slab
Tekmar Tekmar 090 Snow/Ice Sensor In-Slab
$991.99 USD
No reviews
In Stock
Tekmar 070 Outdoor Sensor
Tekmar Tekmar 070 Outdoor Sensor
$55.99 USD
1 review
In Stock
Honeywell HZ322/U TRUZONE Zone Wireless Control PanelHoneywell HZ322 TRUZONE Zone Wireless Control Panel
Honeywell Honeywell HZ322 TRUZONE Zone Wireless Control Panel
$419.99 USD
No reviews
Honeywell TH1100DH1004/U Thermostat Pro 1000 Non Programmable
Honeywell Honeywell TH1100DH1004 Thermostat Pro 1000 Non Programmable
$58.99 USD
No reviews
Sold Out or Discontinued
Tekmar 084 Indoor Sensor - Flush Mount
Tekmar Tekmar 084 Indoor Sensor - Flush Mount
$65.99 USD
No reviews
Emerson 1F95-1291 Blue Series 12" Touchscreen Thermostat
Emerson Emerson 1F95-1291 Blue Series 12" Touchscreen Thermostat
$421.99 USD
No reviews
FAST-STAT Model 5000 HVAC Wiring Extender - Adds x3 Wires + Common 'C' ConnectionFAST-STAT Model 5000 HVAC Wiring Extender - Adds x3 Wires + Common 'C' Connection
FAST-STAT FAST-STAT Model 5000 HVAC Thermostat Wiring Extender
$179.99 USD
No reviews
In Stock
Tekmar 557 TekmarNet Thermostat - Radiant Floor - 2 Heat Pump/Cool - Backup - Humidity
Tekmar Tekmar 557 TekmarNet Thermostat - Radiant Floor - 2 Heat Pump/Cool - Backup - Humidity
$663.99 USD
No reviews
Tekmar 553 TekmarNet Thermostat - Two Stage Heat - One Stage Cool - Fan
Tekmar Tekmar 553 TekmarNet Thermostat - Two Stage Heat - One Stage Cool - Fan
$431.99 USD
No reviews
Tekmar 561 Thermostat Wi-Fi One Stage Cool and Fan
Tekmar Tekmar 562 Thermostat Wi-Fi Two Stage Heat, One Stage Cool and Fan
$451.99 USD
No reviews
Emerson 1F95-1277 Blue Series 12" Touchscreen Thermostat
Emerson Emerson 1F95-1277 Blue Series 12" Touchscreen Thermostat
$421.99 USD
No reviews
Tekmar 521 Thermostat Programmable - Two Heat or Heat-Cool (Includes Sensor 079)
Tekmar Tekmar 521 Thermostat Programmable - Two Heat or Heat-Cool (Includes Sensor 079)
$197.99 USD
1 review
Tekmar 552 TekmarNet Thermostat - One Stage Heat
Tekmar Tekmar 552 TekmarNet Thermostat - One Stage Heat
$358.99 USD
No reviews
In Stock
Tekmar 532 Thermostat One Stage Heat
Tekmar Tekmar 532 Thermostat One Stage Heat
$171.99 USD
No reviews

Recently viewed