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A new retrofit project in Galway has shown just how far the retrofit of a typical Irish home can go, by bringing a 1960s semi-detached house up to the full passive house standard.

When it came to heating, the owners had originally planned to put in a wood pellet boiler and solar thermal. But when M&E specialist Damien Mullins of Heat Doc came on board, he steered them away from that idea, and towards a Thermia air-to-water heat pump, for the sake of simplicity.

“The cost per kilowatt hour of their machines is very good,” Mullins says of Thermia. He says the controls are also excellent, and that the system heats the top of the buffer tank first, so hot water is available instantly. Mullins explains his preference for heat pumps: “They’re nearly like white goods. You don’t have to worry about topping it up with anything. So it’s very clean from a homeowner’s point of view.”

For complete details on this project visit the full Passive House Plus article

Designed around an existing timber chalet, this striking contemporary house managed to go passive on a budget for one lucky family of six, all while inadvertently blitzing Ireland’s forthcoming nearly zero energy building standard.

“On cold days, the condensation is on the outside of the windows.”

Heating is provided via an Air source heat pump BER: A2

A Danfoss air to water heat pump, consisting of an outdoor collector unit (left) and indoor unit with 180 litre cylinder (right), supplies heat to the house via an underfloor heating system.

For complete details on this project visit the full Passive House Plus article

Heat pump borehole

Heat Doc Ltd have been busy out on-site drilling bore holes for our valued customers.

To read all about Heat Pumps and see how they can save you on utility bills while helping your environment see our Heat Pumps section.

Danfoss DHP-Opti-Pro+

Opti technology (including class A circulation pumps). The Optimum technology increases the annual efficiency by about 6% compared to standard heat pumps. Speed controlled circulation pumps guarantees that daily operation is always adjusted according to the user’s requirements and conditions.

Intelligent control system

Danfoss control system has been developed to provide maximum savings. The system uses an algorithm that ensures the lowest possible supply line temperature – while maintaining the desired indoor temperature.

Hot water production: HGW & TWS

The new patented HGW (Hot Gas Water heater) technology increases the annual efficiency of the hot water production by about 20%. Domestic hot water can be produced simultaneously with the heat production, providing plenty of hot water during heating season at a very low cost. The integrated TWS (Tap Water Stratification) technology provides 15% more hot water than conventional water heaters. The large surface area and orientation of the TWS coil ensure a plentiful supply of hot water.

The added “+” makes all the difference

+ Reduce energy consumption – Reduce your heating bills up to 75% with superior 4,8 SPF*
+ Great payback period – Significant savings means that the cost of the investment is paid back
+ More hot water – extra fast – Two state-of-the-art technologies enable 15% more hot water, quicker and at lower cost than any other heat pump with an integrated water heater
+ Classic and Scandinavian design – The elegant design is ideally suited to match any location.
+ Extremely quiet operation
+ Online control and monitoring – Safety and control through online remote control – anywhere and anytime
+ Low-cost air conditioning – Enjoy low-cost air conditioning in warm months
+ Pool heating – Cost-effective pool heating