Energy Tech

Tankless Water Heaters

Energy efficient renai water heatersYou don’t use hot water 24 hours a day, but, you’re paying to heat water all day long. With a standard water heater, you heat and reheat the same water…even when you’re sleeping. Forever Hot Water tankless heating technology is a more efficient way to heat water while saving money and recapturing valuable space in your mechanical room. Using the latest in gas technology, it heats water on-demand and delivers an endless supply of hot water for as long as you need it, offering personalized control for your convenience, comfort and safety. Visit  for more info.








Spray-in Foam Insulation

Energy Efficient Spray Foam
Why insulate with foam insulation? It’s a good question. And in these days of soaring energy costs and uncertain supplies, there is an obvious answer. We believe you should harness the insulating power of foam insulation for use in your home. Not only is it a wise decision, but it is also practical to accomplish with a 21st Century state-of-the-art sprayed-in foam insulation called Spray Foam Insulation. We recommend using EnergyWise in conjunction with this technology to achieve the most efficient results.







Energy Efficient Windows

In climates that mainly require cooling, non-energy efficient windows can be a major source of unwanted heat gain. In recent years, low-E coatings that reject solar heat without darkening the glass have undergone a technological revolution. It is now possible to significantly reduce solar heat gain improving comfort while providing clear views and daylight.


Solar Power

Energy Efficient solar panels
Protect Against Rising Energy Cost and Save Money Receive  rebates from energy companies* Qualify for a 30% federal tax credit** Save up to 40% on your monthly electric bill Save the Environment The average solar energy system in San Antonio prevents about 8,700 pounds of CO2 emissions every year – the equivalent of keeping over 200 cars off the streets for a day. It’s A Simple Three-Step Process Solar photovoltaic (PV) panels are mounted on your roof, where they collect energy from the sun in the form of direct current electricity. The direct current electricity is then converted by an inverter into alternating current electricity for use by your home. The alternating current electricity is fed directly into your home, just like it is from your electricity provider. And since the solar energy system works in tandem with your electricity provider, you’ll continue to get electricity from them when you need more than the solar energy system can provide (e.g. during overcast weather and at night). All you need is at least 100 square feet of un-shaded roof area facing predominantly southward (a little to the east or west is okay).


Rain Water Harvesting

Rain Water Harvesting Tanks are Energy Efficient
Water is our most precious resource. However, an increase in housing and business development in Central Texas is placing an unrealistic demand on our aquifer and municipal water supply. The need for an alternative water source is becoming a necessity. River Hills Custom Homes offers a solution to this problem. Whether it is for landscape irrigation or complete household/business use, rain harvesting provides a safe, dependable water source without depending on endangered water supplies.