Domestic Hot Water Overview

Hot water recirculation is an inexpensive way to save domestic hot water heating energy.

Abacus understands that there are many varieties of domestic hot water systems out there. We keep an open mind to all of their advantages and disadvantages from an educated and unbiased point of view. We successfully rely on a very strong supporting cast of manufacturers, representatives and distributors.

The main types of domestic hot water source are a conventional tank style, tank-less heaters, boiler side arms and solar thermal domestic water systems. The solar thermal system will always require an electric element or hot water coil to make your hot water during bad weather. We can help you understand the differences in cost, efficiency and paybacks.

No matter what your domestic hot water needs are, we can help!

Energy Star incentive page.

The following table are current incentives offered by our Federal Government for tax deduction.

Product Category

Product Type

Tax Credit Specification

Tax Credit


Water Heaters

Gas, Oil, Propane Water Heater

Energy Factor >= 0.82
or a thermal efficiency of at least 90%.

30% of cost, up to $1,5002

Not all ENERGY STAR gas storage and gas condensing water heaters will qualify for the tax credit. All ENERGY STAR gas tankless models will qualify.

ENERGY STAR criteria:

Gas Storage:
Energy Factor >= .62

Gas Tankless:
Energy Factor >= 0.82

Gas Condensing:
Energy Factor >= 0.8

For a partial list of qualifying products go to the Gas Appliance Manufacturing Association

Electric Heat Pump Water Heater

Same criteria as ENERGY STAR: Energy Factor >= 2.0

30% of cost, up to $1,5002

All ENERGY STAR qualified electric heat pump water heaters qualify for the tax credit.

2 Subject to a $1,500 maximum per homeowner for all improvements combined.


  • FREE Lennox Healthy Climate Air Filtration System or 50% off Whole House Humidifier with purchase of new High Efficiency Furnace or Air Conditioning add-on
  • 25% off Tekmar TN4 Comfort Control System with upgrade of current boiler to High Efficiency Con-Mod BoilerThe combination of 1. Properly resizing the boiler to your home; 2. Upgrading boiler efficiency and; 3. Adding an intelligent Tekmar Control system has realized as much as 75% overall savings and optimum comfort for some customer! (not to mention proper system design)
  • 10% off Tekmar TN4 Comfort Control System to add to your existing boiler system for savings of up to 30% off your current fuel costs
  • Free Solar Site Analysis with HUGE Green Incentives available through December 2010 – Call Abacus to ensure your system is done right!
  • Free estimates and consultations/ education on your home or building’s mechanical systems