Around 500,000 people are warmer because of the Government-subsidised home insulation and heating campaign, according to the scheme's boss.
Michael Underhill, Energy Efficiency and Conservation Authority chief executive, defended the scheme on TV3's consumer show Target on Tuesday and said it had been extremely popular and successful after 175,000 houses got either new insulation or heaters.
Consumer Candice Shalfoon complained to Target she could get a cheaper job by not using tradespeople in the state programme and that providers were taking advantage by marking up prices due to the Government subsidy.
"If you think the price is high, get more than one quote," Underhill said.
ECCA provided data this week on the takeup in the Warm Up New Zealand: Heat Smart scheme, showing how the 175,000 houses had either had new insulation or heaters: modern wood and wood-pellet burners, energy-star qualified heat pumps and high star-rated, flued gas heaters.