tN2 House Control Zoom

tN2 House Control


Brand: Tekmar

Qty Price
/ each
In Stock at Supplier! Ships in 2-3 Days
(2 Available)



Ambient Conditions: Indoor use only 32 to 104°F < 90% RH non-condensing
Height (Inches): 5.5
Width: 5-1/2"
Depth (Inches): 2-1/4"
Enclosure Type: O
Boiler Relay: 24 V (ac) 5 A
Boiler System Pump Relay: 115 V (ac) 5 A 1/6 HP
DHW Pump Relay: 115 V (ac) 5 A 1/6 HP
Setpoint: Short. 0 - 32 V (ac)
Output: 0 - 10 V (dc) 3K ohms min load impedance
Weight (lbs): 1.37 lbs
Power Supply: 24V (ac)
Zone Valve Load: 24 V (ac) 2 A
max combined current (zones 1 to 4): 3.7 A
Application: HVAC
Type: House Control

Description for Tekmar 400


The House Control 400 is designed to operate as part of a complete hydronic heating system with tekmarNet®2 (tN2) thermostats. It can provide operation of one outdoor reset water temperature in addition to Domestic Hot Water and Setpoint capabilities. It has four built in zones that can operate up to four zone pumps. It is easy to add more zones, add schedules or other convenient accessories through the use of the tekmarNet®4 (tN4) Expansion terminals.


  • Enclosure: O-Enclosure, blue PC+ABS UL94-5VA plastic
  • Approvals: CSA C US, meets ICES & FCC regulations for EMI / RFI
  • Ambient Conditions: Indoor use only, 32 to 104°F (0 to 40°C), RH 90% Non-condensing
  • Power Supply: 24 V (ac) ±10% 60 Hz, 100 VA max, Class 2
  • Control Load: 2 VA
  • Zone Valve Load: 24 V (ac) 2 A, maximum combined current (zones 1 to 4): 89 VA (3.7A)
  • Boiler Relay: 24 V (ac) 5 A
  • Boiler System Pump Relay - 115 V (ac) 5 A, 1/6 HP
  • DHW Pump Relay: 115 V (ac) 5 A, 1/6 HP
  • Pump Power: 115 V (ac) 12 A max
  • Setpoint and DHW Calls: Short, 0 - 32 V (ac)
  • Boiler Modulating Output: 0 - 10 V (dc), 3 kohm minimum load impedance

tN2 House Control


by PowerReviews
TekmartN2 House Control

(based on 2 reviews)

Ratings Distribution

  • 5 Stars



  • 4 Stars



  • 3 Stars



  • 2 Stars



  • 1 Stars



Reviewed by 2 customers

Displaying reviews 1-2

Back to top


Works Terrific

By Vin

from Massachusetts

Verified Reviewer

Comments about tN2 House Control:

Just installed 400 Control and 3 552 thermostats. I must say I am quite impressed. Boiler control with indoor feedback works perfectly.
Have a Lochinvar Knight with outdoor reset which worked well but outdoor reset only tells half the story and the least important half at that.
Problem had been depending on outdoor temp. one would deal with lengthy return from night setback or short cycling during the day.
With the 400 and the 552, the control decides how far way from target the temp is and adjusts boiler temp based on that info.
Recovering in the am, boiler temp is high despite what the outdoor might recommend. Recovered and control lowers boiler target below what outdoor would recommend. Until you see it in action it might be hard to imagine but it works WOW.
No calculation of savings yet. I supposed will have to calculate degree days vs use to get an accurate comparison.

  • Primary use:
  • Personal

little blue box, big proformance

By blueline

from mahwah, nj

Verified Buyer

Comments about tN2 House Control:

it looks great next to the rest of my controls

  • Primary use:
  • Personal

Displaying reviews 1-2

Back to top

Q&A: Ask the Questions, share answers