Smart 40 Indirect Water Heater, 36.0 Gal

Triangle Tube

Brand: Triangle Tube

Mfr Part#: SMART40

Availability: In Stock
Usually ships: Today, if ordered by 3pm
Qty Price
$1,079.95 / each & Free Shipping
  • Description
  • Literature
  • Reviews
  • FAQs

Smart series indirect water heaters by Triangle Tube (ACV) feature an exclusive tank-in-tank heat exchanger design, with 1.5 - 2 times the heat transfer surface - allowing for high energy-efficiency and hot water recovery times of up to x3 times faster than traditional gas or electric tank water heaters. 2" polyurethane tank insulation ensures minimal heat loss @ only 1°F / hr.


  • ACV exclusive tank-in-tank design;
  • Self-cleaning, maintenance-free heat exchanger with surface area 1.5 - 2 times larger than traditional coil;
  • Provides abundant hot water with a recovery rate of up to 3 times higher than conventional gas or electric water heater;
  • Stand-by heat loss is less than 1°F per hour;
  • Average life span exceeds 20 years.

Technical Specifications:

  • Domestic Water Capacity (Gallons): 36.0;
  • Heat Exchanger Type: Tank-in-Tank;
  • Heating Water Capacity (Gallons): 6.0;
  • Domestic Water Connections: 3/4" NPT;
  • Boiler Connections: 1" NPT;
  • Min. Boiler Output (BTU/hr): 112,000;
  • Continuous Domestic Hot Water Flow @ 90°F Rise (Gallons/hr): 150.0;
  • 1st Hour Rating @ 90°F Rise (Gallons/hr): 180.0;
  • Max Boiler Side Pressure (psi): 45;
  • Max Domestic Water Pressure (psi): 150;
  • Insulation Thickness: 2";
  • Dimensions (Diameter x Height): 22" x 46";
  • Empty Weight (lbs): 135.


Limited lifetime warranty
No reviews yet
Indicate an email address where you wish to receive the answer to your question.
Enter numbers shown above without spaces. This step helps us to prevent automatic submissions.
The following was added to your shopping cart: ×

Forgot Your Password?

Enter your e-mail address below.
You will receive an e-mail
with password reset instructions.


Estimate Delivery Date & Cost

Ship to Zip Code:
Qty (Optional):