Reduce your heating costs with Sweeney Renewables
OFTEC & RGII registered plumbing and heating engineers based in Letterkenny, Co. Donegal — installing Orca air-to-water heat pumps, central heating and plumbing systems for homes and businesses across Ireland and Northern Ireland.
Plumbing, heating & renewable energy, done properly
We deal with every aspect of plumbing and heating, from a single radiator to a full renewable heating system — installed to OFTEC and RGII standard.
Air to Water Heat Pumps
Our flagship system — official Orca agents, up to 70% lower water heating costs.
Learn more →Central Heating
New systems and upgrades for new builds, renovations and everything between.
Learn more →Plumbing
Fully insured, registered plumbers for domestic and commercial premises nationwide.
Learn more →Underfloor Heating
Even, radiator-free warmth for new builds and retrofits.
Learn more →Heating Controls
Wireless, zoned controls so you only pay to heat the rooms you use.
Learn more →Heat Recovery Ventilation
Fresh, filtered air with up to 90% heat recovery efficiency.
Learn more →Aluminium Radiators
Aklimat radiators — smaller, faster-responding, 15-year warranty.
Learn more →Rainwater Harvesting
Collect and filter rainwater to cut mains water costs.
Learn more →OFTEC & RGII registered. Official Orca agents. No high-pressure sales.
- Official Irish agents for Orca — European-made, SEAI-approved air-to-water heat pumps, backed by a 12-year guarantee and 2-year parts warranty.
- Registered & insured — our engineers are OFTEC and RGII registered, fully qualified to work on oil and gas heating systems.
- Real, personal service — as our customers tell us, you get a call back, not a call centre. Frankie answers his own phone.
- Nationwide reach — direct installation from our Donegal base, plus a trained network of local agents across Ireland and Northern Ireland.
What our customers say
A small sample of the feedback we've had from homeowners and businesses across Ireland — read all of it on our testimonials page.
We are very happy with this system as it provides us with constant heat and water without the need of oil or solid fuel.Gregory and Roisin Homeowners, Co. Donegal
Frankie provided a second to none service, dealing with any query. He is not a high pressure salesman but an expert and enthusiast for this energy efficient system.Dr John Carnie Homeowner, Rathmullan, Co. Donegal
Frank and his team installed everything in one day which meant no disruption to our operation. Our bills have fallen by around 10%, including the washer dryer.Aongus McGuinness O'Briens Sandwich Café, Galway